ORION NETWORK SYSTEMS INC/NEW/
POS AM, 1997-07-30
RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT
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      As filed with the Securities and Exchange Commission on July 30, 1997
                                                      Registration No. 333-19167
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                              --------------------
                         POST-EFFECTIVE AMENDMENT NO. 1
                                 TO FORM S-1 ON
                                    FORM S-3

                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                              --------------------

                           Orion Network Systems, Inc.
             (Exact name of registrant as specified in its charter)

            Delaware                                         52-2008654
(State or other jurisdiction of                           (I.R.S. Employer
 incorporation or organization)                        Identification Number)

                             2440 Research Boulevard
                                    Suite 400
                            Rockville, Maryland 20850
                                 (301) 258-8101
          (Address, including zip code, and telephone number, including
             area code, of registrant's principal executive offices)
                              --------------------

                              Richard H. Shay, Esq.
                           Orion Network Systems, Inc.
                             2440 Research Boulevard
                                    Suite 400
                            Rockville, Maryland 20850
                                 (301) 258-8101
       (Name, address, including zip code, and telephone number, including
                        area code, of agent for service)
                              --------------------

                                    Copy to:

                             Steven M. Kaufman, Esq.
                             HOGAN & HARTSON L.L.P.
                           555 Thirteenth Street, N.W.
                             Washington, D.C. 20004
                                 (202) 637-5600
                              --------------------

     Approximate date of commencement of proposed sale to the public: As soon as
practicable after this Registration Statement becomes effective and from time to
time as determined by market conditions.

     If the only  securities  being  registered  on this form are being  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. [ ]
                              --------------------

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]
                              --------------------

     If this Form is filed to  register  additional  securities  for an offering
pursuant to Rule  462(b)  under the  Securities  Act of 1933,  please  check the
following box and list the Securities Act of 1933 registration  statement number
of the earlier effective registration statement for the same offering. [ ]
                              --------------------

     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under  the  Securities  Act of  1933,  check  the  following  box and  list  the
Securities Act of 1933  registration  statement number of the earlier  effective
registration statement for the same offering. [ ]
                              --------------------

     If delivery of the  prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]

    THE  REGISTRANT  HEREBY AMENDS THIS  REGISTRATION  STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER  AMENDMENT  WHICH  SPECIFICALLY  STATES  THAT  THIS  REGISTRATION
STATEMENT SHALL  THEREAFTER  BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE  SECURITIES  ACT OF 1933 OR UNTIL THE  REGISTRATION  STATEMENT  SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION,  ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
================================================================================
<PAGE>

PROSPECTUS

                                 697,400 SHARES

                           ORION NETWORK SYSTEMS, INC.

                                  COMMON STOCK



     This Prospectus  relates to the possible issuance by Orion Network Systems,
Inc. ("Orion" or the "Company") from time to time of up to 697,400 shares of the
Company's  common  stock,  par value  $.01 per share  ("Common  Stock"),  to the
holders of currently  outstanding Warrants (as defined below) to purchase shares
of Common Stock upon the exercise thereof by such holders and in accordance with
a Warrant Agreement (the "Warrant Agreement") relating to the Warrants, dated as
of January 31, 1997,  between the Company and Bankers Trust Company,  as warrant
agent (the "Warrant  Agent").  The Company  offered and sold the Warrants to the
public  pursuant to a prospectus  dated  January 28, 1997 as part of an offering
(the "Bond  Offering")  of 445,000  Senior  Note  Units,  each  Senior Note Unit
consisting  of one 11 1/4%  Senior  Note due 2007 and one  Warrant  to  purchase
0.8463 shares of Common Stock (the "Senior Note  Warrants"),  and 484,000 Senior
Discount Note Units, consisting of one 12 1/2% Senior Discount Note due 2007 and
one Warrant to purchase 0.6628 shares of Common Stock (the "Senior Discount Note
Warrants"  and together with the Senior Note  Warrants,  the  "Warrants").  Each
Senior Note  Warrant and Senior Note  Discount  Warrant  entitles  the holder to
purchase 0.8463 or 0.6628 shares of Common Stock of Orion,  respectively,  at an
exercise  price of $0.01 per share,  subject to  adjustment  as  provided in the
Warrant Agreement. Subject to the effectiveness of the Registration Statement of
which this  Prospectus  is a part,  the  Warrants  may be  exercised at any time
beginning  six months after the closing date of the Bond  Offering,  or July 31,
1997,  and prior to the close of business on January 31,  2007.  The Senior Note
Warrants and Senior  Discount Note Warrants will be  exercisable  to purchase an
aggregate  of  376,608  and  320,792  shares  of  Common  Stock,   respectively,
representing approximately 1.372% and 1.169%,  respectively (approximately 2.54%
in the aggregate),  of the Company's outstanding Common Stock on a fully diluted
basis as of June 30, 1997.

     The Common Stock is traded on the Nasdaq  National  Market under the symbol
"ONSI." On July 22, 1997,  the last  reported  sale price of the Common Stock on
the Nasdaq National Market was $13.875 per share.

     SEE "RISK  FACTORS"  BEGINNING  ON PAGE 6 OF THIS  PROSPECTUS  FOR  CERTAIN
FACTORS RELATING TO AN INVESTMENT IN THE COMMON STOCK.

         THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE
           SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
            COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION
               OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
                  ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
                        REPRESENTATION TO THE CONTRARY IS


                  The date of this Prospectus is July 30, 1997.


<PAGE>


                                TABLE OF CONTENTS

The Company................................................................... 2
Risk Factors.................................................................. 6
Use of Proceeds...............................................................15
Plan of Distribution..........................................................15
Experts.......................................................................15
Legal Matters.................................................................15
Available Information.........................................................16
Incorporation of Certain Documents By Reference...............................16
Forward-Looking Statements....................................................17


                                   THE COMPANY

     Orion is a  rapidly  growing  provider  of  satellite-based  communications
services, focused primarily on (i) private communications network services, (ii)
Internet services and (iii) video distribution and other satellite  transmission
services. Orion provides multinational  corporations with private communications
networks designed to carry high speed data, fax, video  teleconferencing,  voice
and other  specialized  services.  The  Orion  satellite's  ubiquitous  coverage
reaches all locations within its footprint,  enabling the delivery of high speed
data to  customers  in  emerging  markets  and remote  locations  which lack the
necessary infrastructure to support these services. The Company also offers high
speed Internet access and transmission  services to companies outside the United
States seeking to avoid "last mile" terrestrial connections and bypass congested
regional Internet network routes. In addition, Orion provides satellite capacity
for video  distribution,  satellite news gathering and other satellite  services
primarily to broadcasters,  news  organizations and  telecommunications  service
providers. The Company provides its services directly to customer premises using
very small aperture terminals ("VSATs").

     The  Company  commenced  operations  of  Orion  1,  a  high  power  Ku-band
satellite,  in January 1995. As of June 30, 1997,  Orion  serviced 262 customers
through 634 points of service. As of June 30, 1997, Orion's contract backlog was
$253.8 million  (including $89 million for one pre-launch  customer on Orion 3).
Substantially all of Orion's current contracts with customers are denominated in
U.S.  dollars.  For the six months  ended June 30, 1997,  the Company  generated
revenues of $36.9  million and had a loss from  operations,  net loss,  net cash
used in operating  activities  and EBITDA (as defined  below) of $19.2  million,
$50.7 million, $17.6 million and $4.5 million,  respectively. For the year ended
December 31, 1996,  the Company  generated  revenues of $41.8  million and had a
loss from operations, net loss, net cash used in operating activities and EBITDA
of $36.4 million, $27.2 million,  $21.8 million and $0.6 million,  respectively.
"EBITDA"  represents  earnings  before  minority  interests,   interest  income,
interest  expense,  other  expense  (income),  income  taxes,  depreciation  and
amortization.  EBITDA is commonly used in the communications industry to analyze
companies on the basis of operating performance,  leverage and liquidity. EBITDA
is not intended to represent cash flows from  operating,  investing or financing
activities as determined  in accordance  with GAAP.  EBITDA is not a measurement
under GAAP and may not be comparable to other similarly titled measures of other
companies.

     The  Company  believes  that  demand  for  satellite-based   communications
services will continue to grow due to (i) the expansion of businesses beyond the
limits of wide bandwidth  terrestrial  infrastructure,  (ii) accelerating demand
for high speed data  services,  (iii)  growing  demand for Internet and intranet
services,  especially  outside  the  U.S.,  (iv)  increased  size  and  scope of
television   programming    distribution,    (v)   worldwide   deregulation   of
telecommunications  markets  and  (vi)  continuing  technological  advancements.
Satellites are able to provide  reliable,  high bandwidth  services  anywhere in
their  coverage  areas and the Company  believes  that it is well  positioned to
satisfy market demand for these services.

                                      -2-

<PAGE>

     The  Company  launched  Orion 1, a high  power  satellite  with 34  Ku-band
transponders,  in  November  of 1994.  Orion 1 provides  coverage of 34 European
countries,  much of the  United  States  and parts of  Canada,  Mexico and North
Africa.  Through  arrangements with local ground operators,  Orion currently has
the  ability to deliver  network  services  to and among  points in 27  European
countries,  portions of the United States and a limited number of Latin American
countries.

     In July 1996,  the Company  signed a contract  with Matra  Marconi Space UK
Limited ("Matra Marconi Space"), which was amended and restated in January 1997,
for the  construction  and  launch  of  Orion 2, its  second  satellite,  and in
February 1997 commenced construction of that satellite. Orion 2, which will be a
high power  satellite  with 30 Ku-band  transponders,  will expand the Company's
European  coverage  and extend  coverage  to  portions  of the  Commonwealth  of
Independent  States,  Latin  America and the Middle East.  Orion 2 will increase
significantly  the  Company's  pan-European  capacity,  currently  the  area  of
strongest  demand for the Company's  services.  The Company  recently  commenced
selling  services in certain areas of Latin America.  Orion 2 is scheduled to be
launched in the second quarter of 1999.

     In January 1997, the Company entered into a satellite  procurement contract
with Hughes Space and  Communications  International,  Inc. for the construction
and launch of Orion 3,  construction  of which was  commenced in December  1996.
Orion 3, which will be a high power satellite with 33 Ku- band  transponders and
10 C-Band  transponders,  will cover  broad  areas of the Asia  Pacific  region,
including China, Japan, Korea, India,  Southeast Asia,  Australia,  New Zealand,
Eastern Russia and Hawaii. Orion 3's footprint will provide the Company with the
ability to distribute  programming  from the United States via Hawaii to most of
the Asia  Pacific  region.  The Company  has already  taken a number of steps to
establish an early market  presence in Asia,  and has entered into a $89 million
lease for eight of Orion 3's  transponders.  Orion 3 is scheduled to be launched
in the fourth quarter of 1998.

     In the aggregate, the footprints of Orion 1, Orion 2 and Orion 3 will cover
over 85% of the world's population.

     The  Company's  principal  executive  offices are located at 2440  Research
Boulevard,  Rockville,  Maryland  20850,  and  its  telephone  number  is  (301)
258-8101.

RECENT DEVELOPMENTS

     In  January  1997,  Orion  consummated  a series of  transactions  that are
described below,  including the Exchange,  the Merger, the Bond Offering and the
Debentures  Offering (each as defined  below),  the acquisition of the remaining
minority  interest in a subsidiary and certain uses of proceeds of the offerings
(collectively, the "Transactions"), all as described more fully in Note 9 to the
Consolidated  Financial  Statements  incorporated  herein by reference  from the
Company's  Annual  Report on Form 10-K for the year ended  December 31, 1996 and
amendment  thereto on Form 10-K/A dated June 25, 1997 (together,  the "1996 Form
10-K").

ACQUISITION OF ORION ATLANTIC LIMITED PARTNERSHIP INTERESTS IN THE EXCHANGE

     On January 31, 1997,  the Company  acquired all of the limited  partnership
interests  which it did not already own in the Company's  operating  subsidiary,
International Private Satellite Partners, L.P. ("Orion Atlantic"), that owns the
Orion 1 satellite. Specifically, the Company acquired the Orion Atlantic limited
partnership  interests  and  other  rights  relating  thereto  held  by  British
Aerospace  Communications,  Inc.,  COM  DEV  Satellite  Communications  Limited,
Kingston Communications International Limited, Lockheed Martin Commercial Launch
Services,  Inc.,  MCN  Sat  US,  Inc.,  an  affiliate  of  Matra  Hachette,  and
Trans-Atlantic Satellite, Inc., an affiliate of Nissho Iwai Corp. (collectively,
the "Exchanging Partners").

                                      -3-

<PAGE>

     Pursuant to a Section 351 Exchange  Agreement and Plan of  Conversion  (the
"Exchange Agreement"),  the Exchanging Partners exchanged (the "Exchange") their
Orion  Atlantic  limited  partnership  interests  for 123,172  shares of a newly
created class of the Company's  Series C 6%  Cumulative  Convertible  Redeemable
Preferred  Stock (the  "Series C Preferred  Stock").  In  addition,  the Company
acquired  certain rights held by certain of the  Exchanging  Partners to receive
repayment of various advances  (aggregating  approximately  $37.5 million).  The
123,172  shares  of  Series  C  Preferred  Stock  issued  in  the  Exchange  are
convertible  into  approximately 7 million shares of the Company's Common Stock.
As a result of the Exchange, certain of the Exchanging Partners became principal
stockholders of the Company.

     On January 8, 1997,  the Company  acquired  the only  outstanding  minority
interest in the Company's  subsidiary,  Asia Pacific  Space and  Communications,
Ltd.,  from  British  Aerospace  Satellite  Investments,  Inc. in  exchange  for
approximately 86,000 shares of the Company's Common Stock.

     Consummation of the Transactions  resulted in the Company's  acquisition of
100%  of the  equity  interests  in  Orion  Atlantic  and  the  Company's  other
significant   subsidiaries  and,  therefore,   a  greatly  simplified  corporate
structure.

THE MERGER

     The  Exchange  was  conducted  on a  tax-free  basis  by  means of a Merger
(defined  below)  that was  consummated  on January  31,  1997.  Pursuant to the
Exchange Agreement,  Orion Oldco Services, Inc., formerly known as Orion Network
Systems,  Inc. ("Old Orion"),  formed the Company as a new Delaware  corporation
with a certificate of incorporation,  bylaws and capital structure substantially
identical in all material respects with those of Old Orion. Also pursuant to the
Exchange Agreement,  the Company formed a wholly owned subsidiary,  Orion Merger
Company, Inc. ("Orion Merger Subsidiary").  Pursuant to an Agreement and Plan of
Merger,  Orion  Merger  Subsidiary  was merged with and into Old Orion,  and Old
Orion became a wholly owned subsidiary of the Company (the "Merger"). On January
31, 1997, the effective time of the Merger, all of the stockholders of Old Orion
received  stock in the Company with  substantially  identical  rights to the Old
Orion stock they held prior to the effective  time of the Merger.  Following the
Merger,  the Company changed its name from Orion Newco  Services,  Inc. to Orion
Network Systems,  Inc. and the Company's wholly owned subsidiary,  Orion Network
Systems, Inc. changed its name to Orion Oldco Services, Inc.

     The Company is the successor  issuer to Old Orion and filed a  Registration
Statement on Form 8-B with the Securities and Exchange Commission on January 31,
1997,  to register  all the issued and  outstanding  shares of Common  Stock and
preferred  stock of the Company  under the  Securities  Exchange Act of 1934, as
amended (the  "Exchange  Act").  The Company is considered  the successor to Old
Orion for purposes of the Nasdaq National Market and the Company's  Common Stock
is quoted on the Nasdaq National Market under the trading symbol "ONSI."

FINANCINGS

     On January 31, 1997,  the Company  completed the $710 million Bond Offering
composed of 445,000  Senior Note  Units,  each of which  consists of one 11 1/4%
Senior Note due 2007 (a "Senior Note") and one Warrant to purchase 0.8463 shares
of Common Stock, and 484,000 Senior Discount Note Units,  each of which consists
of one 12 1/2%  Senior  Discount  Note due 2007 (a "Senior  Discount  Note," and
together with the Senior Notes,  the "Notes") and one Warrant to purchase 0.6628
shares of Common Stock. Interest on the Senior Notes is payable semi-annually in
cash on January  15 and July 15 of each  year,  commencing  July 15,  1997.  The
Senior  Discount  Notes do not pay cash  interest

                                      -4-

<PAGE>

prior  to  January  15,  2002.   Thereafter,   cash  interest  will  be  payable
semi-annually on January 15 and July 15 of each year, commencing July 15, 2002.

     On January 31, 1997,  the Company also completed the sale of $60 million of
its  convertible  junior  subordinated  debentures  (the  "Debentures")  to  two
investors,  British Aerospace  Holdings,  Inc.  ("British  Aerospace") and Matra
Marconi  Space.  British  Aerospace  purchased $50 million of the Debentures and
Matra Marconi Space purchased $10 million of the Debentures  (collectively,  the
"Debentures  Offering").  The Debentures will mature in 2012 and accrue interest
at a rate of 8.75%  per  annum to be paid  semi-annually  in  arrears  solely in
Common  Stock of the  Company.  The  Debentures  are  subordinated  to all other
indebtedness of the Company, including the Notes.

     The Company  used a portion of the net  proceeds of the Bond  Offering  and
Debentures  Offering  primarily  to repay  the  Orion 1 credit  facility  and to
pre-fund  the first three years of interest  payments on the Senior  Notes.  The
Company will use the balance of such net proceeds  primarily to build and launch
Orion 2 and Orion 3.

PRE-CONSTRUCTION LEASE ON ORION 3

     Orion has entered into a contract with DACOM Corp., a Korean communications
company ("DACOM"), under which DACOM will, subject to certain conditions,  lease
eight   dedicated   transponders  on  Orion  3  for  13  years,  in  return  for
approximately  $89  million,  payable over a period from  December  1996 through
seven months following the lease  commencement date for the transponders  (which
is scheduled to occur by January  1999).  Payments are subject to refund  unless
Orion 3 commences commercial operation by June 30, 1999.

ACQUISITION OF TELEPORT EUROPE GMBH

     On March 26, 1997, Orion acquired Teleport Europe GmbH ("Teleport Europe"),
a German  communications  company specializing in private satellite networks for
voice and data services.  Orion  purchased the shares of Teleport Europe held by
two German companies,  Vebacom GmbH and RWE Telliance AG, now known as o.tel.o.,
for $8.9  million.  Teleport  Europe's  1996  revenues  were  approximately  $14
million.  The acquisition  expanded  Orion's  customer base by  approximately 55
customers,  including some of Germany's leading multinational corporations,  and
added over 200 network service sites (exclusive of broadcast  service sites). In
addition,  Orion acquired Teleport Europe's licenses and operating agreements to
provide  satellite  network services in 40 countries,  including 17 countries in
which Orion previously did not provide service.

                                      -5-

<PAGE>


                                  RISK FACTORS

     In addition to the other  information  contained  in this  Prospectus,  the
following factors should be considered  carefully in evaluating an investment in
the Common Stock, which involves a high degree of risk.  Statements contained in
this Prospectus and in the documents  incorporated herein by reference regarding
Orion's  expectations  with respect to Orion 2 and Orion 3, related  financings,
future operations and other  information,  which can be identified by the use of
forward-looking  terminology,  such as "may,"  "will,"  "expect,"  "anticipate,"
"estimate," or "continue" or the negative thereof or other variations thereon or
comparable  terminology,  are  forward-looking  statements within the meaning of
Section  27A of the  Securities  Act and Section 21E of the  Exchange  Act.  See
"Forward-Looking   Statements."  The  discussions  set  forth  below  constitute
cautionary  statements  identifying  important  factors  with  respect  to  such
forward-looking  statements,  including  certain risks and  uncertainties,  that
could cause actual results to differ  materially from results referred to in the
forward-looking statements.  There can be no assurance that Orion's expectations
regarding any of these matters will be fulfilled. The forward-looking statements
are  made  as of the  date of  this  Prospectus,  and  the  Company  assumes  no
obligation to update the forward-looking statements or to update the reasons why
actual  results  could  differ  from  those  projected  in such  forward-looking
statements.

LIMITED OPERATIONS; HISTORY OF LOSSES, EXPECTATION OF FUTURE LOSSES

     From its inception in 1982 through January 20, 1995, when Orion 1 commenced
commercial operations, Orion was a development stage company. Accordingly, Orion
has limited experience operating its business.  Orion has experienced net losses
in each fiscal year since its inception,  including net losses of  approximately
$26.9 million and $27.2  million  during 1995 and 1996,  respectively.  On a pro
forma basis, giving effect to the Transactions, the Company would have had a net
loss of $145.7 million and $133.6 million for 1995 and 1996,  respectively.  The
increase in net loss on a pro forma basis is associated with the depreciation on
the step up in the basis of the Orion 1 satellite and the amortization of excess
cost over fair value resulting from the acquisition of the Exchanging  Partners'
partnership  interests in Orion  Atlantic in the  Exchange,  the net increase to
interest  expense  as a  result  of the  Transactions,  and the  elimination  of
minority  interest as a result of the Exchange.  See Note 9 to the  Consolidated
Financial  Statements of the Company  included in the Company's  1996 Form 10-K.
Orion also had a net loss of $26.0  million  during the three months ended March
31, 1997. The  implementation  of Orion's  business plan  regarding  Orion 2 and
Orion 3 requires  substantial capital for the construction,  launch,  insurance,
financing and start-up costs of those satellites. A substantial portion of these
costs has been financed with  indebtedness,  which will  substantially  increase
interest  costs.  The Company's  negative cash flow (after  payments for capital
expenditures and interest) has been substantial and net losses and negative cash
flows (after  payments for capital  expenditures  and  interest) are expected to
increase over the next few years.

CAPITAL INTENSIVE BUSINESS; NEED FOR ADDITIONAL CAPITAL

     Based upon its current  expectations for growth, the Company anticipates it
will have substantial funding requirements over the next three years to fund the
costs of Orion 2 and Orion 3, the purchase of VSATs, other capital  expenditures
and other capital  needs.  The Company has  pre-funded  the first three years of
interest  payments  on the  Senior  Notes  out of the net  proceeds  of the Bond
Offering.

     The  in-orbit  delivered  costs of the Orion 2 and Orion 3  satellites  are
expected  to  aggregate   approximately   $500  million.   In  addition  to  the
approximately  $50 million  incurred  through the second quarter of 1997,  Orion
will need to make payments of  approximately  $50 million,  $350 million and $50
million in the  remainder of 1997,  1998 and 1999,  respectively.  These amounts
include the Company's  estimate  regarding the cost of launch insurance based on
discussions with potential  insurers,  although the Company has not received any
commitment to provide insurance. The contracts for

                                      -6-

<PAGE>

Orion 2 and Orion 3 provide firm fixed prices for the construction and launch of
those  satellites  and provide for  penalties  in event of late  delivery by the
manufacturer;  however,  the Company's  actual  payments could be  substantially
higher due to any change orders for the satellites,  insurance rates, delays and
other factors.

     The Company  anticipates that its existing cash balances and payments under
the DACOM contract will be sufficient to meet  substantially  all of its capital
requirements  for the  delivery  in orbit of Orion 2 and Orion 3. In  connection
with the Bond Offering,  the Company segregated $273 million of the net proceeds
to make payments for additional  satellites and certain related costs (or to pay
interest and principal on the Notes).  The Company can also apply to such uses a
portion of its  working  capital of $111.2  million at June 30,  1996.  However,
there can be no assurance  that cost increases for Orion 2 and/or Orion 3 due to
change orders,  insurance rates or construction delays, among other factors, may
not increase the Company's capital requirements or that the Company's growth may
not vary from its expectations, resulting in changes in its cash requirements or
expected cash position.

     The balance of the Company's  funding  requirements  are dependent upon its
growth and cash flow from  operations.  The Company cannot  predict  whether its
existing  resources  and cash flows will be  adequate  to cover its future  cash
needs.  If existing  resources  and cash flows are not  sufficient  to cover the
Company's  future  cash  needs,  the  Company  will  need  to  raise  additional
financing. The Company does not have a revolving credit facility or other source
of readily available  capital.  Sources of additional capital may include public
or private debt, equity financings or strategic investments.  To the extent that
the Company seeks to raise additional debt financing, the Notes indentures limit
the  amount of such  additional  debt the  Company  may incur and  prohibit  the
Company from using Orion 1, Orion 2 or Orion 3 as  collateral  for  indebtedness
for money  borrowed.  Moreover,  the  Company's  ability to raise public  equity
financing  may be limited by the  registration  rights it has granted to certain
investors. See "-- Potential Adverse Effect of Shares Eligible for Future Sale."
If the Company requires  additional  financing and is unable to obtain financing
from outside  sources in the amounts and at the times  needed,  there would be a
material adverse effect on the Company and the value of the Common Stock.

     The  foregoing  estimates  of capital  needs do not include any amounts for
other possible financing  requirements.  The Company may from time to time enter
into joint ventures and make  acquisitions  of  complementary  businesses and is
often engaged in discussions or negotiations with regard to such potential joint
ventures and acquisitions.  Such joint ventures or acquisitions would need to be
financed,  which would increase the Company's need for  additional  capital.  In
addition,  Orion  intends  to  replace  Orion  1 at the end of its  useful  life
(expected  to  be  in  October  2005).  Such  replacement  likely  will  require
additional  financing if the cash flow from Orion's operations is not sufficient
to fund a replacement satellite.

SUBSTANTIAL LEVERAGE; SECURED INDEBTEDNESS

     As of June 30,  1997,  Orion had  approximately  $789  million of long-term
indebtedness, and was highly leveraged. The accretion of original issue discount
on the Senior Discount Notes will  substantially  increase Orion's  liabilities.
The  Company  deposited  approximately  $134  million  in a pledged  account  to
pre-fund  the first six  scheduled  payments of  interest  on the Senior  Notes.
However,  the Company will need to service the cash  interest  expense on a very
substantial amount of indebtedness  (including the Notes) with cash generated by
its  operations.  For  1996  (on  a  pro  forma  basis,  giving  effect  to  the
Transactions)  and the six months ended June 30, 1997, the Company had EBITDA of
$0.6  million and $4.5  million,  respectively,  and  interest  expense of $94.8
million and $40.0 million, respectively.

     The level of the Company's  indebtedness could have important  consequences
to holders of Common  Stock,  including  the  following:  (i) the ability of the
Company to obtain any necessary

                                      -7-

<PAGE>

financing in the future for capital expenditures,  working capital, debt service
requirements or other purposes may be limited; (ii) a substantial portion of the
Company's cash flow from operations, if any, must be dedicated to the payment of
principal of and interest on its indebtedness and other obligations and will not
be available for use in the  Company's  business;  (iii) the Company's  level of
indebtedness could limit its flexibility in planning for, or reacting to changes
in, its business;  (iv) the Company will be more highly  leveraged  than some of
its competitors,  which may place it at a competitive disadvantage;  and (v) the
Company's high degree of indebtedness  will make it more vulnerable to a default
and the  consequences  thereof  (such as  bankruptcy  workout) in the event of a
downturn in its business.

RISKS OF SATELLITE LOSS OR REDUCED PERFORMANCE

     Satellite   Loss  or  Reduced   Performance.   Satellites  are  subject  to
significant  risks,  including  launch failure,  damage that impairs  commercial
performance, failure to achieve correct orbital placement during launch, loss of
fuel that reduces satellite life, and satellite in-orbit risks. Although Orion 1
has been  successfully  launched and is in  commercial  operation,  and although
Orion maintains  satellite  in-orbit  insurance on Orion 1, any loss in orbit or
reduced performance of Orion 1 would have a material adverse effect on Orion. In
addition,  no assurance  can be given that the launch of Orion 2 or Orion 3 will
be successful.  Although various sources of data permit  differing  conclusions,
Orion is aware of  sources  indicating  that the  historical  loss  rate for all
commercial geosynchronous satellite launches may be as high as 15%. Launch risks
vary based upon the launch  vehicle used.  The Delta III launcher to be used for
Orion 3 is new and has no significant launch history.  Even though the Delta III
is based upon earlier Delta launch  vehicles,  the new technology  used in Delta
III could affect its launch success rate. A Delta II launch vehicle  exploded on
January 17, 1997.

     Orion may have to change launch vehicles and could be subject to delays and
higher costs of launch insurance if, for example,  one of its selected  vehicles
experiences a launch failure with respect to another  satellite.  In such event,
delays  in the  launch  of one of  Orion's  satellites  could  result  from  the
manufacturer's  need to  investigate  the  reasons for the failure of the launch
vehicle and address any design or manufacturing concerns that are identified. It
is not  possible to predict  the  duration of any such  potential  delays.  With
respect to the risk of launch failure of Orion's satellites, Orion has an option
to  purchase  an  additional  satellite  (which  may be  used  as a  replacement
satellite) to be delivered in orbit, in the case of Orion 3, within 12, 15 or 19
months (at Orion's  election) after it exercises the option,  or, in the case of
Orion 2,  within 21 1/4 months  after it  exercises  the option.  Therefore,  an
unsuccessful  launch of Orion 2 or Orion 3 would involve a delay in revenues for
at least  one  year,  and  perhaps  substantially  longer.  Any loss or delay of
revenue  from any of the  Company's  satellites  would have a  material  adverse
effect on the Company and the value of the Common Stock.

     In November 1995, one of Orion 1's components  supporting nine transponders
of  dedicated  capacity  serving the  European  portion of the Orion 1 footprint
experienced  an anomaly  that  resulted  in a  temporary  service  interruption,
lasting  approximately  two hours.  Full service to all affected  customers  was
restored  using  redundant  equipment  on  the  satellite.   These  transponders
currently generate a majority of Orion's revenues.  Orion believes, based on the
data  received  to date by  Orion  from  its own  investigations  and  from  the
manufacturer,  and  based  upon  advice  from  Orion's  independent  engineering
consultant,  Telesat Canada, that because the redundant component is functioning
fully in accordance with  specifications  and the performance  record of similar
components is strong,  the anomalous behavior is unlikely to affect the expected
performance of the satellite over its useful life.  Furthermore,  there has been
no further effect on Orion's ability to provide services to customers.  However,
in the  event  that  the  currently  operating  component  fails,  Orion 1 would
experience a significant  loss of usable  capacity.  In such event,  while Orion
would be entitled to insurance  proceeds of approximately  $47 million and could
lease  replacement  capacity  and  function as a reseller  with  respect to such
capacity (at  substantially  reduced gross margins),  the loss of capacity would
have a material adverse effect on the Company and the value of the Common Stock.

                                      -8-

<PAGE>

     Limited  Insurance  for  Satellite  Launch  and  Operation.   The  in-orbit
insurance of Orion 1 and the launch and in-orbit insurance for Orion 2 and Orion
3 will not protect the Company against business  interruption,  loss or delay of
revenues  and  similar  losses and may not fully  reimburse  the Company for its
expenditures. In addition, such insurance includes or can be expected to include
certain contract terms,  exclusions,  deductibles and material change conditions
that are customary in the industry. Accordingly, an unsuccessful launch of Orion
2 or Orion 3 or any significant  loss of performance  with respect to any of its
satellites  would have a material  adverse  effect on Orion and the value of the
Common Stock.  Although Orion intends to procure insurance for the construction,
launch and  insurance  costs of Orion 2 and Orion 3, Orion has not  obtained any
commitment from insurance  underwriters to provide launch  insurance for Orion 2
or Orion 3. There can be no assurance  that such  insurance will be available or
that the  price of such  insurance  or the terms and  exclusions  in the  actual
insurance  policy  will be  favorable  to the  Company.  A failure of one of the
launch  vehicles  selected  by Orion  prior to the  launch of Orion 2 or Orion 3
could substantially increase the cost of launch insurance for Orion.

     Limited  Life of  Satellites.  While Orion 1 is expected to have an orbital
life of approximately 10.7 years (through October 2005), and Orion 2 and Orion 3
are  expected  to have  orbital  lives of  approximately  13 years and 15 years,
respectively,  there  can be no  assurance  as to the  actual  longevity  of the
satellites.  A number of factors will affect the useful life of each  satellite,
including the rate of fuel  consumption in achieving  correct orbital  placement
during  launch,  the  quality  of its  construction  and the  durability  of its
component  parts.   There  is  a  significant   possibility  that  one  or  more
transponders   on  a  satellite  may  cease  to  function  in  accordance   with
specifications  during its estimated  useful life and there is no assurance that
service could be restored through  redundant  transponders.  In addition,  while
Orion plans to replace each  satellite at the end of its useful life,  there can
be no assurance that the required  financing and  regulatory  approvals to do so
will be available.

LAUNCH OF ORION 2 AND ORION 3 SUBJECT TO SIGNIFICANT UNCERTAINTIES

     Cost   Uncertainties.   Based  on  the  current   designs  of  and  current
construction  schedules  for Orion 2 and Orion 3, the total costs of Orion 2 and
Orion 3, including construction,  launch, launch insurance,  financing costs and
start-up expenses,  are presently estimated to be approximately $265 million and
$275 million, respectively. These costs may increase as a result of changes that
may occur during the  construction of the satellites or if the cost of insurance
exceeds the Company's  expectations.  There can be no assurance  that the actual
costs of these  satellites will not be materially  greater than these estimates.
To the extent that actual costs are materially greater than expected, completion
of Orion 2 and Orion 3 will likely  require  substantial  additional  financing.
Failure to raise such  financing  would have a material  adverse effect on Orion
and the value of the Common Stock.

     Timing Uncertainties. Orion presently plans to launch Orion 2 in the second
quarter of 1999 and plans to launch Orion 3 in the fourth quarter of 1998, based
upon the construction and launch schedules set forth in the satellite contracts.
To meet  these  schedules,  Orion must  receive  certain  regulatory  approvals,
finalize the satellite  designs and take other necessary steps.  Failure to meet
the  construction  and launch  schedules  could  increase the cost of Orion 2 or
Orion 3, requiring additional financing. Although the Orion 2 satellite contract
and the Orion 3 satellite contract are fixed-price contracts with firm schedules
for construction,  delivery and launch, there can be no assurance that increases
in costs due to change orders or delay will not occur. There can be no assurance
that the  launch of Orion 2 or Orion 3 will take place as  scheduled.  Delays in
launching  satellites are quite common,  and a significant delay in the delivery
or launch of Orion 2 or Orion 3 would have a material  adverse effect on Orion's
marketing plan for such satellites,  its ability to generate revenue and service
its indebtedness and the value of the Common Stock.

                                      -9-

<PAGE>

     Risks of Proceeding  With  Construction  Prior to Obtaining all  Regulatory
Approvals for Orion 2 and Orion 3. Orion has commenced  construction  of Orion 2
and  Orion  3  prior  to  completion  of  the  required  consultation  with  the
International  Telecommunications  Satellite  Organization  ("INTELSAT") and the
European regional satellite facilities  consortium  ("EUTELSAT") (in the case of
Orion  2),  receipt  of final  authority  from the U.S.  Federal  Communications
Commission  (the  "FCC")  (in  the  case  of  Orion  2)  and  completion  of the
International  Telecommunication Union ("ITU") coordination process.  Failure to
obtain one more  necessary  approvals  in a timely  manner  would  likely have a
material  adverse effect on the Company.  See "Approvals  Needed;  Regulation of
Industry" below.

Risks  Relating  to  Potential  Lack of Market  Acceptance  and  Demand;  Ground
Operations

     Orion's  success will depend in part on the continued  growth in demand for
international  private network  services,  which to date have not been a primary
focus of satellite  companies,  and on Orion's  ability to market such  services
effectively.  Marketing will be critical to Orion's success.  However, Orion has
limited  experience in marketing,  having  commenced full commercial  operations
only in 1995. Orion's marketing program until recently consisted of direct sales
using  a  U.S.-based  sales  force,  and  indirect  sales  channels,   including
Exchanging  Partner  sales  representatives,  for sales in Europe.  During 1996,
certain of Orion's indirect sales channels in Europe did not meet  expectations,
and Orion has supplemented  its sales in Europe by significantly  increasing its
direct  sales  capabilities  in Europe,  particularly  with  respect to sales of
private network services,  through expansion of its sales force and acquisitions
such as the purchase of Teleport Europe in March 1997. However,  there can be no
assurance  that  this  effort  will be  successful.  Sales of  Orion's  services
generally involve a long-term,  complex sales process, and new contract bookings
will  vary from  quarter  to  quarter.  In  addition,  as an early  provider  of
international   network   services   using  VSATs,   Orion  is  subject  to  the
uncertainties  associated  with  the  development  of  new  services,  including
uncertainties regarding customer interest in and acceptance of higher data speed
communications, the need to develop and convince customers of the attractiveness
of new applications,  and customer  acceptance of the ability of Orion (as a new
market  entrant)  to provide  service.  In  addition,  Orion's  operations  will
continue to depend significantly on Orion's ability to provide ground operations
for private network services using ground operators  throughout the footprint of
Orion's  satellites.  In the event that its network of ground  operators  is not
maintained  and  expanded or fails to perform as  expected,  Orion's  ability to
offer private network services will be impaired.

RISKS CONCERNING ABILITY TO MANAGE GROWTH

     The Company's future  performance will depend, in part, upon its ability to
manage its growth  effectively,  which will  require it to continue to implement
and improve its marketing,  operating,  financial and accounting  systems and to
expand, train and manage its employee base and manage its relationships with its
local  ground  operators.  For  example,  Orion is in the  process of seeking to
integrate  a  significant   number  of  newly  hired  direct  sales   personnel.
Furthermore,  the  Company may from time to time enter into joint  ventures  and
acquire  complementary  businesses  and  is  often  engaged  in  discussions  or
negotiations with regard to such potential joint ventures and acquisitions. Such
joint ventures and acquired  businesses,  such as Teleport Europe, would need to
be integrated  with the Company,  which would place an additional  burden on the
Company's  internal  systems  and its  ability to manage its  employees  and its
relationships  with its local  ground  operators.  In  addition,  the  Company's
ability to attract new orders is subject to substantial  variations from quarter
to quarter.  If the Company fails either to expand in accordance  with its plans
or to manage its growth effectively, there could be a material adverse effect on
its business,  growth,  financial  condition  and results of operations  and the
value of the Common Stock.

                                      -10-

<PAGE>

POTENTIAL ADVERSE EFFECTS OF COMPETITION

     The international  telecommunications  industry is highly  competitive.  In
providing  international   telecommunications   services,  Orion  competes  with
established  satellite and other transmission  facilities  providers,  including
INTELSAT, EUTELSAT, PanAmSat and consortia of major telephone carriers operating
undersea  fiber  optic  cables.   In  addition,   Orion  competes  with  certain
established  telephone  carriers,  such as AT&T, MCI,  Sprint,  British Telecom,
Cable & Wireless, Deutsche Telekom, France Telecom and Kokusai Denshin Denwa, as
well as resellers of satellite capacity, such as companies similar to Impsat, in
providing  private network  communications  services.  Many of these competitors
have  significant  competitive  advantages,   including  long-standing  customer
relationships,  close ties with regulatory authorities, control over connections
to local telephone lines and the ability to subsidize  competitive services with
revenues from services they provide as a dominant or monopoly  carrier,  and are
substantially  larger  than  Orion  and have  financial  resources,  experience,
marketing  capabilities and name recognition that are substantially greater than
those of Orion.  The Company  believes  that  competition  in emerging  markets,
particularly  with  respect to  private  network  services,  will  intensify  as
dominant and monopoly long distance providers adapt to a competitive environment
and large carriers  increase  their presence in these markets.  The Company also
believes that  competition  in more  developed  markets will  intensify as large
carriers consolidate,  enhance their international  alliances and increase their
focus on private network services. For example, the pending merger involving MCI
and British  Telecom may  substantially  increase  the ability of the  resulting
businesses to provide  trans-Atlantic  private network services.  The ability of
Orion to compete with these organizations will depend in part on Orion's ability
to  price  its  services  at  a  significant  discount  to  terrestrial  service
providers,  its  level  of  customer  support  and  service,  and the  technical
advantages of its systems.

     The services provided by the Company have been subject to decreasing prices
over recent  years and this  pricing  pressure is expected to continue  (and may
accelerate) for the foreseeable  future.  Orion will need to increase its volume
of sales in order to compensate for such price  reductions.  Orion believes that
customers  will  increase  the data speeds in their  communications  networks to
support new applications, and that such upgrading of customer networks will lead
to  increased  revenues  that will  mitigate  the  effect  of price  reductions.
However,  there can be no assurance that this will occur.  In addition,  a large
portion of satellite capacity globally is currently used for video distribution.
As an increasing  portion of satellite  capacity is used for  providing  private
network  services,  prices for these  services may decline.  Compressed  digital
video ("CDV"), which substantially  increases transmission capacity per channel,
is beginning to be used for video  distribution.  As CDV becomes more prevalent,
the supply of effective video capacity could increase significantly, which could
result in lower prices.

     The Company is aware of a substantial  number of new satellites that are in
construction  or in the planning  stages.  Most of these  satellites  will cover
areas within the footprint of Orion 1 and/or the proposed  footprints of Orion 2
and Orion 3. As these new  satellites  (other than  replacement  satellites  not
significantly larger than the ones they replace) commence operations,  they will
substantially increase the capacity available for the provision of services that
compete with the Company's  services.  After a satellite  has been  successfully
delivered in orbit,  the variable cost of  transmitting  additional data via the
satellite is limited.  Accordingly,  absent a corresponding  increase in demand,
this new  capacity  can be expected to result in  significant  additional  price
reductions.  Continued price  reductions could have a material adverse effect on
Orion and the value of the Common Stock.

APPROVALS NEEDED; REGULATION OF INDUSTRY

     Telecommunications   Regulatory  Policy.  Orion  is  subject  to  the  U.S.
Communications  Act  of  1934,  as  amended  (the  "Communications   Act"),  and
regulation  by the FCC (and,  to a limited  extent,  by the U.S.  Department  of
Commerce) and by the national and local governments of other countries.

                                      -11-

<PAGE>

The FCC regulates  terms and conditions of  communications  services,  including
among other things  changes in control or assignment  of licenses.  The business
prospects  of Orion could be  adversely  affected  by the  adoption of new laws,
policies or  regulations,  or changes in the  interpretation  or  application of
existing  laws,  policies or  regulations,  that  modify the present  regulatory
environment or conditions of the licenses granted by the FCC to Orion.

     Additional Regulatory Approvals Needed. The launch and operation of Orion 2
and Orion 3 will require a number of additional regulatory approvals,  including
the  following:  (i)  approvals  of the FCC  (in the  case  of  Orion  2);  (ii)
completion of successful  consultations  with INTELSAT and, in the case of Orion
2, with EUTELSAT;  (iii)  satellite  "landing"  rights in countries that are not
INTELSAT  signatories or that require additional  approvals to provide satellite
or VSAT services;  and (iv) other regulatory approvals.  Obtaining the necessary
licenses and approvals  involves  significant  time and expense,  and receipt of
such   licenses  and  approvals   cannot  be  assured.   Although  the  FCC  has
conditionally  authorized  the  construction,  launch and  operation  of Orion 2
(subject to  completion  of an INTELSAT  consultation  and  required  showing of
ability to finance the  construction,  launch and  operation for one year of the
satellite,  which  requirements  generally  must  be  satisfied  for  final  FCC
authorization of all FCC satellite  licenses),  and Orion will apply for certain
other approvals for Orion 2 and Orion 3, the FCC  authorization  for Orion 2 has
not become final (since Orion has not yet satisfied the  conditions) and most of
the other requisite approvals have not yet been obtained. Failure to obtain such
approvals  would  have a material  adverse  effect on Orion and the value of the
Common Stock. In addition,  Orion is required to obtain  approvals from numerous
national  and  local  authorities  in the  ordinary  course of its  business  in
connection with most  arrangements  for the provision of services.  Within Orion
1's  footprint,  such  approvals  generally have not been difficult for Orion to
obtain in a timely manner,  but the failure to obtain  particular  approvals has
delayed,  and in the future may delay,  the provision of services by Orion.  The
Orion 1 license  from the FCC  expires in January  2005.  Although  Orion has no
reason  to  believe  that its  licenses  will not be  renewed  (or new  licenses
obtained) at the  expiration of the license  term,  there can be no assurance of
renewal.  In addition,  Orion will need to comply with the national laws of each
country in which it provides  services.  Laws with respect to satellite services
are currently unclear in certain jurisdictions,  particularly within the Orion 3
footprint.  In certain of these  jurisdictions,  satellite  services may only be
provided via domestic  satellites.  The Company  believes  that certain of these
restrictions  may change and that it can structure its operations to comply with
the remaining restrictions. However, there can be no assurance in this regard.

     ITU  Coordination  Process.  An  international  treaty to which the  United
States and the Republic of the Marshall  Islands  (through which the Company has
applied for the Orion 3 orbital slot) are parties  requires ITU  coordination of
satellite  orbital slots.  Various  non-U.S.  governments or  telecommunications
authorities have commenced  coordination  procedures pursuant to ITU regulations
for proposed  satellites at orbital locations and in frequency bands that are in
close  proximity to those proposed for Orion 2 and Orion 3. Existing  satellites
and any proposed  satellites that are launched prior to Orion 2 and Orion 3 will
effectively  have priority  over Orion's  satellites.  Orion's  proposed use for
Orion 2 and Orion 3 conflicts  to some  extent  with the use or proposed  use of
certain  existing  or proposed  satellites.  While  Orion  believes  that it can
successfully  coordinate  the use of the orbital  locations and frequency  bands
proposed  for Orion 2 and Orion 3, there can be no assurance  that  coordination
will be achieved.  The Company has commenced construction of Orion 2 and Orion 3
prior to completion of ITU  coordination  and there can be no assurance that ITU
coordination will be completed. In the event that successful coordination cannot
be achieved,  Orion may have to modify the satellite design for Orion 2 or Orion
3 in order to  minimize  the  extent of any  potential  interference  with other
proposed  satellites using those orbital  locations or frequency bands. Any such
modifications  could increase the cost or delay the launch of the satellites (if
significant changes to the satellite are required) and may result in limitations
on the use of one or more transponders on Orion 2 or Orion 3, which could affect
the amount of revenue realized from such  transponders.  If interference  occurs
with  satellites  that  are in  close  proximity  to Orion 2 or Orion 3, or with
satellites  that are  subsequently  launched into  locations in close  proximity
before completion

                                      -12-

<PAGE>

of ITU coordination  procedures,  such interference would have an adverse effect
on the  proposed use of the  satellites  and on Orion's  business and  financial
performance. Orion cannot predict the extent of any adverse effect on Orion from
any such occurrences.

UNCERTAINTIES RELATING TO BACKLOG

     The  Company's  current  backlog  consists  of a mix  of  large  and  small
contracts  for private  communications  networks and  transmission  capacity for
video and other  satellite  transmission  services  with a variety of customers.
Although many of the Company's  customers,  especially customers under large and
long-term   contracts,   are  large  corporations  with  substantial   financial
resources, other contracts are with companies that may be subject to business or
financial risks affecting  their credit  worthiness.  If customers are unable or
unwilling to make required  payments,  the Company may be required to reduce its
backlog  figures  (which would  result in a reduction in future  revenues of the
Company), and such reductions could be substantial.  In 1996, the Company had to
remove from its backlog  significant  contracts with customers.  Orion presently
anticipates that  approximately  $217.8 million of its $253.8 million in backlog
(as of June 30,  1997) will be realized  after  1997.  The  Company's  contracts
commence and  terminate on fixed dates.  If the Company is delayed in commencing
service or does not provide the required service under any particular  contract,
as it has occasionally done in the past, it may not be able to recognize all the
revenue it initially includes in backlog under that contract.  In addition,  the
current  backlog  contains some contracts for the useful life of Orion 1; if the
useful life of Orion 1 is shorter than expected, some portion of backlog may not
be realized  unless  services  satisfactory to the customer can be provided over
another satellite.

TECHNOLOGICAL CHANGES

     Although Orion  believes that Orion 1 does employ,  and Orion 2 and Orion 3
will employ, advanced technologies, the telecommunications industry continues to
experience  substantial  technological  changes. The Company believes that there
are numerous  telecommunications  companies that are seeking ways to improve the
data  transmission  capacity of the  existing  terrestrial  infrastructure.  Any
significant  improvement of such capacity,  particularly  with respect to copper
wire, would have a material  adverse effect on Orion.  There can be no assurance
that  other  changes  will  not  adversely  affect  the  prospects  or  proposed
operations or expenses of Orion.

RISKS OF CONDUCTING INTERNATIONAL BUSINESS

     The Company's  international service contracts are generally denominated in
U.S.  dollars  and  those  of  its  Teleport  Europe  subsidiary  are  generally
denominated  in Deutsche  Marks.  It is possible  that the portion of  contracts
denominated in non-U.S. currencies will increase over time. The vast majority of
the  Company's  costs  (including  interest and  principal  of the Notes,  other
indebtedness  and the costs for VSATs,  Orion 2 and Orion 3) are  denominated in
U.S. dollars.  Accordingly, an increase in the value of the U.S. dollar relative
to other currencies could have an adverse effect on the Company and the value of
the Common Stock.  International  operations  are also subject to certain risks,
such  as  changes  in  domestic   and   foreign   government   regulations   and
telecommunication standards, licensing requirements,  tariffs or taxes and other
trade barriers and political and economic instability.

DEPENDENCE OF ORION ON KEY PERSONNEL

     Orion's business is dependent on its executive and other officers and other
key personnel.  Orion presently does not have employment  contracts with, or key
man life insurance covering,  such key officers or other personnel.  The loss of
key officers or personnel could have an adverse effect on Orion.

                                      -13-

<PAGE>

CONTROL OF ORION BY PRINCIPAL STOCKHOLDERS

     Executive  officers,   directors  and  their  affiliates  own  beneficially
approximately  8.0 million shares or  approximately  43% of Orion's  outstanding
voting  stock  (12  million  shares or  approximately  46% of the  voting  stock
outstanding on a fully diluted basis). As a result of their stock ownership and,
in the case of stockholders with  representation on the Board of Directors,  the
incumbency of directors  affiliated  with them, such  stockholders  are and will
continue to be in a position to elect the Board of Directors and thereby control
the affairs and management of Orion.

RISKS RELATING TO SENIOR PREFERRED STOCK

     At June 30, 1997, the Company has outstanding  approximately  $16.6 million
(including  accrued  dividends)  of  Orion  Series  A 8%  Cumulative  Redeemable
Convertible  Preferred Stock and approximately  $5.0 million  (including accrued
dividends)  of Orion Series B 8%  Cumulative  Redeemable  Convertible  Preferred
Stock (collectively,  the "Senior Preferred Stock"). Although the holders of the
Senior Preferred Stock have agreed not to exercise any such mandatory redemption
or repurchase  rights while the Notes or the  Debentures are  outstanding,  such
holders have the right to require Orion to repurchase the shares of Common Stock
received as a result of conversion  of the Senior  Preferred  Stock upon,  among
other things, certain mergers,  changes of control or sales of substantially all
the assets of Orion at the pro rata interest of the holders of such stock in the
consideration  received  or, in the case of certain  fundamental  changes,  fair
market value; and, beginning in June 1999 such holders have the right to require
Orion to repurchase  Senior  Preferred Stock (and any Common Stock received upon
the  conversion  thereof) at the fair market value (in the case of Common Stock)
or liquidation  value,  including  accrued and unpaid  dividends (in the case of
Senior  Preferred  Stock).  In addition,  the  documents  relating to the Senior
Preferred  Stock impose certain  covenants on Orion,  and failure to comply with
those covenants could have an adverse effect on Orion.


LIMITATIONS ON PAYING DIVIDENDS ON COMMON STOCK

     Orion has never paid any cash  dividends  on its Common  Stock and does not
anticipate  paying  cash  dividends  in the  foreseeable  future.  Orion  is not
permitted  to pay  dividends  on the  Common  Stock  as  long  as the  Company's
preferred  stock is  outstanding,  subject to  certain  limited  exceptions.  In
addition,  the  Notes  indentures  effectively  prohibit  the  payment  of  cash
dividends on the Common Stock for the foreseeable future.

POTENTIAL ADVERSE EFFECT OF SHARES ELIGIBLE FOR FUTURE SALE

     There are approximately  27.4 million shares of Common Stock outstanding on
a fully diluted basis.  Orion's current  stockholders (other than the Exchanging
Partners,  British  Aerospace and Matra Marconi Space) hold  approximately  14.5
million  of  these  shares,  all  of  which  are  freely  transferable   without
restriction or further registration under the Securities Act, other than the 5.5
million  shares held by  "affiliates"  of the  Company,  as that term is defined
under the  Securities  Act.  The shares held by  affiliates  are  expected to be
eligible for sale pursuant to Rule 144 under the Securities  Act. The Exchanging
Partners,  as owners of the Series C Preferred Stock, and British  Aerospace and
Matra Marconi Space, as owners of the Debentures, own the remaining 11.4 million
of such shares of Common Stock,  which will be issuable upon  conversion of such
securities.   All  of  such  remaining  shares  are  deemed  to  be  "restricted
securities"  as that  term is  defined  in Rule  144.  However,  the  Exchanging
Partners,  British Aerospace and Matra Marconi Space have certain shelf,  demand
and "piggy-back"  registration  rights with respect to the Common Stock issuable
to them  upon  conversion,  pursuant  to which  (in the  case of the  Exchanging
Partners)  the Company  [has filed] [is filing  substantially  contemporaneously
with the date as this Registration Statement of which this Prospectus is a part]
a "shelf"  registration  statement which will cover the  registration of certain

                                      -14-

<PAGE>

Eligible Registrable  Securities (as defined to include approximately 25% of the
Common Stock issuable to the Exchanging Partners upon conversion of the Series C
Preferred Stock).  The Company will also be required to file certain  additional
shelf registration  statements for the Exchanging  Partners so that they will be
able to sell, each quarter,  up to 25% of the Common Stock issuable to them upon
conversion, on a non-cumulative basis, and certain additional shelf registration
statements for the holders of the  Debentures.  No predictions can be made as to
the effect, if any, that sales of Common Stock or the availability of additional
shares  of  Common  Stock  for  sale  would  have on the  market  price  of such
securities. Nevertheless, the foregoing could adversely affect the market prices
of the Common Stock and the ability of the Company to raise equity financing.

ANTI-TAKEOVER AND OTHER PROVISIONS OF THE CERTIFICATE OF INCORPORATION

     Orion's   Certificate  of  Incorporation   includes   provisions  that  may
discourage  or prevent  certain  types of  transactions  involving  an actual or
potential  change in  control  of  Orion,  including  transactions  in which the
stockholders  might  otherwise  receive a premium  for  their  shares  over then
current market prices. In addition,  the Board of Directors has the authority to
fix the rights and preferences of and issue shares of preferred stock, which may
have the effect of delaying or  preventing a change in control of Orion  without
action  by the  stockholders.  The  staggered  terms of the  Company's  Board of
Directors could also discourage any potential  acquirer.  Orion's Certificate of
Incorporation  also permits the  redemption  of Common  Stock from  stockholders
where necessary to protect Orion's regulatory licenses. In addition,  any change
of control of Orion is subject to the prior approval of the FCC.


                                 USE OF PROCEEDS

     The net  proceeds  from  issuances  of Common  Stock upon  exercise  of the
Warrants  will be nominal and are  expected to be used as part of the  Company's
working capital.


                              PLAN OF DISTRIBUTION

     The  Company  may from time to time  issue up to  697,400  shares of Common
Stock to the holders of the Warrants upon  exercise  thereof by such holders and
in  accordance  with the Warrant  Agreement.  The Company  will issue the Common
Stock directly or through agents to the holders of the Warrants.


                                     EXPERTS

     The consolidated  financial  statements of Orion Network  Systems,  Inc. at
December 31, 1996 and 1995,  and for each of the three years in the period ended
December 31, 1996,  appearing in the Orion Network  Systems,  Inc. Annual Report
(Form 10-K and amendment thereto on Form 10-K/A) for the year ended December 31,
1996 have been audited by Ernst & Young LLP, independent  auditors, as set forth
in their report thereon included  therein and incorporated  herein by reference.
Such consolidated  financial  statements are incorporated herein by reference in
reliance  upon such report  given upon the  authority of such firm as experts in
accounting and auditing.


                                  LEGAL MATTERS

     Certain legal matters in  connection  with the Common Stock offered  hereby
are being  passed  upon for the Company by Hogan & Hartson  L.L.P.,  Washington,
D.C., counsel for the Company.

                                      -15-

<PAGE>

                              AVAILABLE INFORMATION

     The Company is subject to the  informational  requirements  of the Exchange
Act, and, in accordance therewith,  files reports and other information with the
Securities  and Exchange  Commission  (the  "Commission").  Such reports,  proxy
statements  and other  information  can be  inspected  at the  Public  Reference
Section  maintained  by the  Commission at Room 1024,  450 Fifth  Street,  N.W.,
Washington, D.C. 20549 and the following regional offices of the Commission: 500
West Madison Street,  Suite 1400,  Chicago,  Illinois 60661-2511 and Seven World
Trade Center,  13th Floor, New York, New York 10048. Copies of such material can
be  obtained  from the Public  Reference  Section of the  Commission,  450 Fifth
Street,  N.W.,  Washington,  D.C. 20549,  upon payment of prescribed rates or in
certain   cases  by  accessing   the   Commission's   World  Wide  Web  site  at
http://www.sec.gov.  In addition,  the  Company's  Common Stock is listed on the
Nasdaq National Market (Symbol:  ONSI),  and such reports,  proxy statements and
other information concerning the Company also can be inspected at the offices of
Nasdaq Operations, 1735 K Street, N.W., Washington, D.C. 20006.

     The Company has filed with the Commission a registration  statement on Form
S-3 (the  "Registration  Statement"),  of which this Prospectus is a part, under
the  Securities  Act,  with respect to the Common  Stock  offered  hereby.  This
Prospectus does not contain all of the information set forth in the Registration
Statement, certain portions of which have been omitted as permitted by the rules
and regulations of the Commission. Statements contained in this Prospectus as to
the contents of any contract or other  documents are not  necessarily  complete,
and in  each  instance,  reference  is made to the  copy  of  such  contract  or
documents filed as an exhibit to the Registration Statement, each such statement
being qualified in all respects by such reference and the exhibits and schedules
thereto.  For further  information  regarding  the Company and the Common Stock,
reference is hereby made to the  Registration  Statement  and such  exhibits and
schedules  which may be obtained from the Commission at its principal  office in
Washington, D.C. upon payment of the fees prescribed by the Commission.

     No  person  has  been  authorized  to  given  any  information  or make any
representations  not contained in this  Prospectus in connection  with the offer
made  by  this  Prospectus   and,  if  given  or  made,   such   information  or
representations must not be relied upon as having been authorized by the Company
or by any underwriter,  dealer or agent.  This Prospectus does not constitute an
offer  to sell or a  solicitation  of an offer  to buy any of the  Common  Stock
offered hereby in any  jurisdiction to any person to whom it is unlawful to make
such  offer or  solicitation  in such  jurisdiction.  This  Prospectus  does not
constitute an offer to sell or a solicitation  to buy any securities  other than
those to which it relates.  Neither the delivery of this Prospectus nor any sale
of  or  offer  to  sell  the  Common  Stock  offered  hereby  shall,  under  any
circumstances,  create  an  implication  that  there  has been no  change in the
affairs of the Company since the date hereof or that the  information  herein is
correct as of any time subsequent to its date.


INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The  documents  listed  below  have  been  filed by the  Company  (File No.
000-22085)  under the  Exchange  Act with the  Commission  and are  incorporated
herein by reference:

     1.   The Company's  Annual Report on Form 10-K for the year ended  December
          31, 1996 and amendment thereto on Form 10-K/A dated June 25, 1997.

     2.   The  Company's  Quarterly  Report on Form 10-Q for the  quarter  ended
          March 31, 1997.

                                      -16-

<PAGE>

     3.   The Company's  definitive  proxy  statement on Schedule 14A filed with
          the Commission on April 22, 1997, with respect to the Company's annual
          meeting of stockholders held on May 22, 1997.

     4.   The  Company's  Current  Report on Form 8-K dated  February  14, 1997,
          reporting consummation of the Exchange, and Current Report on Form 8-K
          dated March 26, 1997,  reporting  consummation  of the  acquisition of
          Teleport Europe.

     5.   The  description  of  the  Company's  Common  Stock  contained  in the
          Company's Registration Statement on Form 8-B filed with the Commission
          on January 31, 1997,  pursuant to Section  12(g) of the Exchange  Act,
          including any  amendments or reports filed for the purpose of updating
          such description.

     All documents filed  subsequent to the date of this Prospectus  pursuant to
Section 13(a),  13(c),  14 or 15(d) of the Exchange Act and prior to termination
of the offering of the Common Stock to which this  Prospectus  relates  shall be
deemed to be  incorporated  by  reference in this  Prospectus  and shall be part
hereof from the date of filing of such document.

     Any statement  contained herein or in a document  incorporated or deemed to
be incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this  Prospectus to the extent that it is modified or superseded
by a statement  contained (i) in this Prospectus  (i.e. where a statement herein
modifies or supersedes a statement in a previously  filed document  incorporated
or deemed to be  incorporated  by reference  herein),  (ii) in any  accompanying
Prospectus  Supplement  relating to a specific offering of Common Stock or (iii)
in any other  subsequently filed document that is also incorporated or deemed to
be  incorporated  by  reference  herein.  Any  such  statement  so  modified  or
superseded  shall  not be  deemed,  except  as so  modified  or  superseded,  to
constitute a part of this Prospectus or any accompanying  Prospectus Supplement.
Subject to the foregoing,  all information appearing in this Prospectus and each
accompanying   Prospectus  Supplement  is  qualified  in  its  entirety  by  the
information appearing in the documents incorporated by reference.

     The Company will provide  upon  written or oral request  without  charge to
each person to whom a copy of this Prospectus is delivered, including beneficial
owners, a copy of any or all of the documents  incorporated  herein by reference
(other than exhibits to such  documents,  unless such exhibits are  specifically
incorporated by reference in such  documents).  Written requests for such copies
should be addressed to Richard H. Shay, Esq., the Company's General Counsel,  at
2440 Research  Boulevard,  Rockville,  Maryland  20850,  telephone  number (301)
258-8101.


                           FORWARD-LOOKING STATEMENTS

     Information set forth in this Prospectus, including under the caption "Risk
Factors," and incorporated by reference herein contains various "forward-looking
statements" within the meaning of Section 27A of the Securities Act, and Section
21E of the Exchange Act, which statements  represent Orion's reasonable judgment
concerning  the future and are  subject  to risks and  uncertainties  that could
cause  Orion's  actual  operating  results  and  financial  position  to  differ
materially.  Such  forward-looking  statements  include the  following:  Orion's
projections  regarding the  continuation  of operating  losses and net cash flow
deficits;  Orion's  belief  and the  judgments  of its  independent  engineering
consultant,  Telesat Canada,  regarding the expected  performance of the Orion 1
satellite  over its useful life,  and the effect of such  performance on Orion's
business;  Orion's expectations regarding the period for construction and launch
of Orion 2 and  Orion  3;  Orion's  belief  that it can  overcome  uncertainties
relating  to Orion 2 and Orion 3;  Orion's  expectations  regarding  receipt  of
regulatory  approvals,  coordination  of orbital slots and avoidance of possible
interference;   Orion's  beliefs   regarding   existing  and  future  regulatory
requirements,  its  ability to comply with such  requirements  and the effect of
such  requirements  on  its  business;  Orion's  belief  that  it  can  overcome

                                      -17-

<PAGE>

uncertainties  relating to Orion 2 and Orion 3; Orion's  expectations  regarding
receipt of regulatory approvals,  coordination of orbital slots and avoidance of
possible interference;  Orion's beliefs regarding existing and future regulatory
requirements,  its  ability to comply with such  requirements  and the effect of
such  requirements on its business;  Orion's  beliefs  regarding the competitive
advantages of satellites and of Orion's  satellites,  strategies and services in
particular,  both in general and as compared to other  providers  of services or
transmission  capacity  and other  services  presently  offered  or which may be
offered  in  the  future;   Orion's   expectations   regarding   the  growth  in
telecommunications  and the  demand  for  telecommunications  services;  Orion's
beliefs regarding the demand for or attractiveness of Orion's services;  Orion's
beliefs regarding  technological advances and their effect on telecommunications
services or demand  therefor;  Orion's  beliefs  regarding  availability  of net
operating loss carryforwards;  Orion's beliefs regarding its representatives and
distributors;  Orion's  intention not to pay any dividend on the Common Stock in
the foreseeable future; Orion's belief that any liability that might be incurred
by Orion upon the resolution of certain existing or future legal proceedings not
having a material  adverse  effect on the  consolidated  financial  condition or
results of operations of Orion; and the adoption of new accounting  releases not
being material to its financial condition or results of operations.

     Orion cautions that the above statements are further qualified by important
factors that could cause Orion's actual results to differ  materially from those
in the  forward-looking  statements.  Such factors include,  without limitation,
those set forth in this  Prospectus  under "Risk Factors" and the following:  no
assurances   regarding  the  business  plan;   Orion's  history  of  losses  and
expectation  of future losses;  the  substantial  financial  risks and financing
requirements;  substantial  leverage  and  limits on  Orion's  ability  to raise
additional  funds;  risks of satellite  loss or reduced  performance;  launch of
Orion 2 and  Orion 3  being  subject  to  significant  uncertainties;  potential
adverse  effects of  competition;  no  assurances  regarding  approvals  needed,
current or future regulation of the  telecommunications  industry; no assurances
regarding  technological  changes; risks of conducting  international  business;
dependence   of  Orion  on  key   personnel;   control  of  Orion  by  principal
stockholders;  risks  relating  to  senior  preferred  stock;  limits  on paying
dividends on Orion common stock; and  anti-takeover  and other provisions of the
Certificate of Incorporation. See "Risk Factors."

                                      -18-

<PAGE>


                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM  14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

     The following table sets forth the various  expenses in connection with the
issuance and distribution of the securities being registered hereby,  other than
underwriting discounts and commissions. All amounts are estimated.

Blue Sky Fees and Expenses                                       3,000
Accounting Fees and Expenses                                    15,000
Legal Fees and Expenses                                         10,000
Printing and Engraving Expenses                                  2,000
                                                                ------
          Total                                                $30,000
                                                                ------

ITEM  15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

     Orion.  Orion's  Certificate of  Incorporation  provides that its directors
will not be liable for monetary  damages for breach of the directors'  fiduciary
duty  of  care  to the  Company  and its  stockholders.  This  provision  in the
Certificate  of  Incorporation  does not  eliminate  the  duty of  care,  and in
appropriate  circumstances  equitable  remedies  such as an  injunction or other
forms of  non-monetary  relief would remain  available  under  Delaware  law. In
accordance with the requirements of Delaware law, as amended, the Certificate of
Incorporation  provide that the  Company's  directors  would  remain  subject to
liability  for  monetary  damages (i) for any breach of their duty of loyalty to
the  corporation  or its  shareholders,  (ii) for acts or omissions  not in good
faith or involving  intentional  misconduct or knowing  violation of law,  (iii)
under Section 174 of the Delaware  Code for approval of an unlawful  dividend or
an unlawful stock purchase or redemption and (iv) for any transaction from which
the director derived an improper personal benefit.  This provision also does not
affect a director's  responsibilities  under any other laws, such as the federal
securities laws or state or federal environmental laws.

     Orion's   Certificate  of  Incorporation  also  provides  that,  except  as
expressly  prohibited by law,  Orion shall  indemnify any person who was or is a
party (or threatened to be made a party) to any threatened, pending or completed
action,  suit or  proceeding  by reason of the fact that such person is or was a
director  or officer of Orion (or is or was serving at the request of Orion as a
director or officer of another  enterprise),  against expenses,  liabilities and
losses (including attorney's fees),  judgments,  fines and amounts paid or to be
paid in settlement actually and reasonably incurred by such person in connection
with such action,  suit or  proceeding  if such person acted in good faith and a
manner  such  person  reasonably  believed  to be in or not  opposed to the best
interests of Orion, and, with respect to any criminal action or proceeding,  had
no  reasonable  cause  to  believe  his  or  her  conduct  was  unlawful.   Such
indemnification shall not be made in respect of any claim, issue or matter as to
which such person  shall have been  adjudged  to be liable to Orion  unless (and
only to the extent  that) the  Delaware  Court of Chancery or the court in which
such action or suit was brought determines that, in view of all circumstances of
the case, such person is fairly and reasonably entitled to indemnity.

     Orion  Oldco  Services,  Inc.  ("Old  ONSI").  Old  ONSI's  Certificate  of
Incorporation  provides  that its  directors  will not be  liable  for  monetary
damages for breach of the directors'  fiduciary duty of care to Old ONSI and its
stockholders.  This  provision  in the  Certificate  of  Incorporation  does not
eliminate the duty of care, and in appropriate  circumstances equitable remedies
such as an  injunction  or  other  forms of  non-monetary  relief  would  remain
available  under Delaware law. In accordance  with the  requirements of Delaware
law, as amended, the Certificate of Incorporation

                                      II-1

<PAGE>

provide that Old ONSI's directors would remain subject to liability for monetary
damages  (i) for any breach of their duty of loyalty to the  corporation  or its
shareholders,  (ii)  for  acts or  omissions  not in  good  faith  or  involving
intentional  misconduct or knowing  violation of law, (iii) under Section 174 of
the  Delaware  Code for  approval of an unlawful  dividend or an unlawful  stock
purchase or  redemption  and (iv) for any  transaction  from which the  director
derived an improper  personal  benefit.  This  provision  also does not affect a
director's responsibilities under any other laws, such as the federal securities
laws or state or federal environmental laws.

     Old ONSI's  Certificate  of  Incorporation  also provides  that,  except as
expressly prohibited by law, Old ONSI shall indemnify any person who was or is a
party (or threatened to be made a party) to any threatened, pending or completed
action,  suit or  proceeding  by reason of the fact that such person is or was a
director or officer of Old ONSI (or is or was serving at the request of Old ONSI
as a  director,  officer,  employee  or agent of  another  enterprise),  against
expenses,  liabilities and losses (including attorney's fees), judgments,  fines
and amounts paid or to be paid in settlement actually and reasonably incurred by
such person in connection with such action, suit or proceeding.

     Orion  Network   Services,   Inc.   (formerly   known  as  Orion  Satellite
Corporation)  ("OrionServ").  OrionServ's  Certificate of Incorporation provides
that its  directors  will not be liable for  monetary  damages for breach of the
directors'  fiduciary  duty of  care to  OrionServ  and its  stockholders.  This
provision in the  Certificate  of  Incorporation  does not eliminate the duty of
care, and in appropriate  circumstances equitable remedies such as an injunction
or other forms of non-monetary relief would remain available under Delaware law.
In accordance with the requirements of Delaware law, as amended, the Certificate
of  Incorporation  provides that  OrionServ's  directors would remain subject to
liability  for  monetary  damages (i) for any breach of their duty of loyalty to
the  corporation  or its  shareholders,  (ii) for acts or omissions  not in good
faith or involving  intentional  misconduct or knowing  violation of law,  (iii)
under Section 174 of the Delaware  Code for approval of an unlawful  dividend or
an unlawful stock purchase or redemption and (iv) for any transaction from which
the director derived an improper personal benefit.  This provision also does not
affect a director's  responsibilities  under any other laws, such as the federal
securities laws or state or federal environmental laws.

     OrionServ's  Bylaws  provide that,  except as expressly  prohibited by law,
OrionServ  shall indemnify any person who was or is a party (or threatened to be
made a party) to any threatened, pending or completed action, suit or proceeding
by reason of the fact that such person is or was a director,  officer,  employee
or agent of OrionServ (or is or was serving any other  enterprise at the request
of OrionServ),  against expenses,  liabilities and losses (including  attorney's
fees),  judgments,  fines and amounts paid or to be paid in settlement  actually
and reasonably  incurred by such person in connection with such action,  suit or
proceeding.

     OrionNet Finance Corporation. OrionNet Finance Corporation's Certificate of
Incorporation  provides  that its  directors  will not be  liable  for  monetary
damages for breach of the directors'  fiduciary duty of care to OrionNet Finance
Corporation  and  its  stockholders.   This  provision  in  the  Certificate  of
Incorporation   does  not  eliminate  the  duty  of  care,  and  in  appropriate
circumstances  equitable  remedies  such as an  injunction  or  other  forms  of
non-monetary  relief would remain  available  under  Delaware law. In accordance
with  the  requirements  of  Delaware  law,  as  amended,   the  Certificate  of
Incorporation  provides  that OrionNet  Finance  Corporation's  directors  would
remain  subject to liability  for  monetary  damages (i) for any breach of their
duty of  loyalty  to the  corporation  or its  shareholders,  (ii)  for  acts or
omissions  not in good  faith or  involving  intentional  misconduct  or knowing
violation of law,  (iii) under  Section 174 of the Delaware Code for approval of
an unlawful  dividend or an unlawful  stock  purchase or redemption and (iv) for
any transaction  from which the director derived an improper  personal  benefit.
This  provision  also does not affect a  director's  responsibilities  under any
other  laws,   such  as  the  federal   securities  laws  or  state  or  federal
environmental laws.

                                      II-2

<PAGE>

     OrionNet  Finance  Corporation's  Bylaws provide that,  except as expressly
prohibited by law,  OrionNet Finance  Corporation shall indemnify any person who
was or is a party (or threatened to be made a party) to any threatened,  pending
or completed  action,  suit or proceeding by reason of the fact that such person
is or was a director, officer, employee or agent of OrionNet Finance Corporation
(or is or was serving any other  enterprise  at the request of OrionNet  Finance
Corporation),  against expenses,  liabilities and losses  (including  attorney's
fees),  judgments,  fines and amounts paid or to be paid in settlement  actually
and reasonably  incurred by such person in connection with such action,  suit or
proceeding.

     Asia Pacific Space and Communications, Ltd. ("APSC"). APSC's Certificate of
Incorporation  provides that the personal  liability of its  directors  shall be
eliminated  to the fullest  extent  provided by Section 7 of  Subsection  (b) of
Section 102 of the Delaware Code.  This paragraph  allows for the elimination of
all personal  liability,  provided  that  liability  shall not be  eliminated or
limited  (i) for any breach of their duty of loyalty to the  corporation  or its
shareholders,  (ii)  for  acts or  omissions  not in  good  faith  or  involving
intentional  misconduct or knowing  violation of law, (iii) under Section 174 of
the  Delaware  Code for  approval of an unlawful  dividend or an unlawful  stock
purchase or  redemption  and (iv) for any  transaction  from which the  director
derived an improper  personal  benefit.  This  provision in the  Certificate  of
Incorporation   does  not  eliminate  the  duty  of  care,  and  in  appropriate
circumstances  equitable  remedies  such as an  injunction  or  other  forms  of
non-monetary  relief would remain  available  under Delaware law. This provision
also does not affect a director's responsibilities under any other laws, such as
the federal securities laws or state or federal environmental laws.

     APSC's Certificate of Incorporation also provides that APSC shall indemnify
its directors, officers, employees and agents to the fullest extent permitted by
Section  145 of the  Delaware  Code,  as the same  exists  or may  hereafter  be
amended.   Section  145  currently  covers  expenses,   liabilities  and  losses
(including attorney's fees), judgments,  fines and amounts paid or to be paid in
settlement  actually and reasonably  incurred by such person in connection  with
such action,  suit or proceeding if such person acted in good faith and a manner
such person reasonably believed to be in or not opposed to the best interests of
APSC, and, with respect to any criminal action or proceeding,  had no reasonable
cause to believe his or her conduct was unlawful. Such indemnification shall not
be made in respect of any claim,  issue or matter as to which such person  shall
have been adjudged to be liable to APSC unless (and only to the extent that) the
Delaware Court of Chancery or the court in which such action or suit was brought
determines that, in view of all circumstances of the case, such person is fairly
and reasonably entitled to indemnity.

     Orion Network  Systems-Asia  Pacific,  Inc.  (formerly  known as Orion Asia
Pacific Corporation) ("Orion Asia Pacific"). Orion Asia Pacific's Certificate of
Incorporation  provides  that its  directors  will not be  liable  for  monetary
damages  for  breach  of the  directors'  fiduciary  duty of care to Orion  Asia
Pacific and its stockholders. This provision in the Certificate of Incorporation
does not eliminate the duty of care, and in appropriate  circumstances equitable
remedies  such as an  injunction  or other forms of  non-monetary  relief  would
remain  available  under Delaware law. In accordance  with the  requirements  of
Delaware law, as amended,  the Certificate of Incorporation  provides that Orion
Asia Pacific's  directors would remain subject to liability for monetary damages
(i)  for  any  breach  of  their  duty  of  loyalty  to the  corporation  or its
shareholders,  (ii)  for  acts or  omissions  not in  good  faith  or  involving
intentional  misconduct or knowing  violation of law, (iii) under Section 174 of
the  Delaware  Code for  approval of an unlawful  dividend or an unlawful  stock
purchase or  redemption  and (iv) for any  transaction  from which the  director
derived an improper  personal  benefit.  This  provision  also does not affect a
director's responsibilities under any other laws, such as the federal securities
laws or state or federal environmental laws.

     Orion Asia Pacific's Bylaws provide that, except as expressly prohibited by
law,  Orion Asia Pacific  shall  indemnify  any person who was or is a party (or
threatened to be made a party) to any threatened,  pending or completed  action,
suit or  proceeding by reason of the fact that such person is

                                      II-3

<PAGE>

or was a director,  officer,  employee or agent of Orion Asia  Pacific (or is or
was serving any other enterprise at the request of Orion Asia Pacific),  against
expenses,  liabilities and losses (including attorney's fees), judgments,  fines
and amounts paid or to be paid in settlement actually and reasonably incurred by
such person in connection with such action, suit or proceeding.

     OrionNet,  Inc.  ("OrionNet")..  OrionNet's  Certificate  of  Incorporation
provides that its directors  will not be liable for monetary  damages for breach
of the directors' fiduciary duty of care to OrionNet and its stockholders.  This
provision in the  Certificate  of  Incorporation  does not eliminate the duty of
care, and in appropriate  circumstances equitable remedies such as an injunction
or other forms of non-monetary relief would remain available under Delaware law.
In accordance with the requirements of Delaware law, as amended, the Certificate
of  Incorporation  provides that  OrionNet's  directors  would remain subject to
liability  for  monetary  damages (i) for any breach of their duty of loyalty to
the  corporation  or its  shareholders,  (ii) for acts or omissions  not in good
faith or involving  intentional  misconduct or knowing  violation of law,  (iii)
under Section 174 of the Delaware  Code for approval of an unlawful  dividend or
an unlawful stock purchase or redemption and (iv) for any transaction from which
the director derived an improper personal benefit.  This provision also does not
affect a director's  responsibilities  under any other laws, such as the federal
securities laws or state or federal environmental laws.

     OrionNet's  Bylaws  provide  that,  except as expressly  prohibited by law,
OrionNet  shall  indemnify any person who was or is a party (or threatened to be
made a party) to any threatened, pending or completed action, suit or proceeding
by reason of the fact that such person is or was a director,  officer,  employee
or agent of OrionNet (or is or was serving any other  enterprise  at the request
of OrionNet),  against expenses,  liabilities and losses  (including  attorney's
fees),  judgments,  fines and amounts paid or to be paid in settlement  actually
and reasonably  incurred by such person in connection with such action,  suit or
proceeding.

     Orion  Network  Systems-Europe,  Inc.  (formerly  known as  Orion  Atlantic
Europe, Inc.) Orion Network Systems-Europe,  Inc.'s Certificate of Incorporation
provides that its directors  will not be liable for monetary  damages for breach
of the directors' fiduciary duty of care to Orion Network  Systems-Europe,  Inc.
and its  stockholders.  This provision in the Certificate of Incorporation  does
not  eliminate  the duty of care,  and in  appropriate  circumstances  equitable
remedies  such as an  injunction  or other forms of  non-monetary  relief  would
remain  available  under Delaware law. In accordance  with the  requirements  of
Delaware law, as amended,  the Certificate of Incorporation  provides that Orion
Network  Systems-Europe,  Inc.'s directors would remain subject to liability for
monetary  damages (i) for any breach of their duty of loyalty to the corporation
or its  shareholders,  (ii) for acts or omissions not in good faith or involving
intentional  misconduct or knowing  violation of law, (iii) under Section 174 of
the  Delaware  Code for  approval of an unlawful  dividend or an unlawful  stock
purchase or  redemption  and (iv) for any  transaction  from which the  director
derived an improper  personal  benefit.  This  provision  also does not affect a
director's responsibilities under any other laws, such as the federal securities
laws or state or federal environmental laws.

     Orion Network  Systems-Europe,  Inc.'s  Certificate of  Incorporation  also
provides   that,   except  as  expressly   prohibited  by  law,   Orion  Network
Systems-Europe,  Inc.  shall  indemnify  any  person  who was or is a party  (or
threatened to be made a party) to any threatened,  pending or completed  action,
suit or  proceeding  by reason of the fact that such person is or was a director
or officer of Orion  Network  Systems-Europe,  Inc. (or is or was serving at the
request  of Orion  Network  Systems-Europe,  Inc.  as a  director  or officer of
another  enterprise),   against  expenses,  liabilities  and  losses  (including
attorney's fees), judgments,  fines and amounts paid or to be paid in settlement
actually and reasonably  incurred by such person in connection with such action,
suit or proceeding.

     Section 145 of the Delaware Code empowers a corporation  incorporated under
that statute to indemnify its directors,  officers, employees and agents and its
former  directors,  officers,  employees  and agents and those who serve in such
capacities with another  enterprise at its request against

                                      II-4

<PAGE>

expenses, as well as judgments, fines and settlements in nonderivative lawsuits,
actually and reasonably  incurred by them in connection  with the defense of any
action, suit or proceeding in which they or any of them were or are made parties
or are threatened to be made parties by reason of their serving or having served
in such  capacity.  The power to indemnify  shall only exist where such officer,
director,  employee or agent has acted in good faith and in a manner such person
reasonably  believed  to be in or not  opposed  to  the  best  interests  of the
corporation  and,  in the case of a criminal  action,  where such  person had no
reasonable cause to believe his conduct was unlawful.  However,  in an action or
suit by or in the right of the  corporation,  unless a court shall  determine to
the contrary,  where such a person has been adjudged liable to the  corporation,
the corporation shall have no power of  indemnification.  Indemnity is mandatory
to the  extent  a  claim,  issue  or  matter  has  been  successfully  defended.
Indemnification  is not  deemed  exclusive  of any other  rights to which  those
indemnified may be entitled, under any by-law,  agreement,  vote of stockholders
or otherwise. A Delaware corporation also has the power to purchase and maintain
insurance on behalf of the persons it has the power to indemnify, whether or not
indemnity against such liability would be allowed under the statute.

     International Private Satellite Partners,  L.P. ("IPSP"). The Third Amended
and Restated Agreement of Limited Partnership of International Private Satellite
Partners,  L.P.  (the "IPSP  Partnership  Agreement")  provides that neither the
general  partner  (OrionServ)  nor  any of its  affiliates  , nor  any of  their
respective partners, officers,  directors,  employees or agents, shall be liable
to IPSP or its limited partners for any losses sustained or liabilities incurred
as a result of any act or omission,  so long as such conduct does not constitute
bad  faith,  fraud,  gross  negligence,  willful  misconduct  or  breach  of any
fiduciary duty.

     The IPSP  Partnership  Agreement  also provides  that,  except as expressly
prohibited by law, IPSP shall  indemnify  OrionServ,  its  affiliates  and their
respective partners, officers, directors,  employees and agents from any and all
expenses,  liabilities and losses (including attorney's fees), judgments,  fines
and amounts paid or to be paid in settlement  arising from any claims,  demands,
actions,  suits or proceedings,  arising out of or incidental to the business or
activities relating to IPSP.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933,  as amended (the  "Securities  Act"),  may be  permitted to  directors,
officers and controlling persons of Orion pursuant to the foregoing provision or
otherwise,  Orion has been advised  that, in the opinion of the  Securities  and
Exchange Commission,  such indemnification is against public policy as expressed
in the Securities Act and therefore unenforceable. In the event that a claim for
indemnification   against  such  liabilities  is  asserted  by  such  person  in
connection  with the offering of the  Securities  (other than for the payment by
the  corporation  of  expenses  incurred  or  paid  by a  director,  officer  or
controlling  person of the corporation in the successful  defense of any action,
suit or proceeding),  the either  corporation will, unless in the opinion of its
counsel the matter has been settled by controlling precedent,  submit to a court
of appropriate  jurisdiction the question of whether such  indemnification by it
is against public policy as expressed in the Securities Act and will be governed
by the final adjudication of the issue.

     Orion has  insurance  policies  which will insure  directors  and  officers
against  damages from actions and claims  incurred in the course of their duties
and will insure the corporations against expenses incurred in defending lawsuits
arising from certain alleged acts of the directors and officers.

                                      II-5

<PAGE>

ITEM 16.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

     (A) EXHIBITS.

EXHIBIT
NUMBER     EXHIBIT DESCRIPTION

3.1        Restated Certificate of Incorporation of Orion Network Systems,  Inc.
           (Incorporated  by  reference  to exhibit  number 3.1 in  Registration
           Statement on Form 8-B filed with the Commission on January 31, 1997).

3.2        Amended  and  Restated   Bylaws  of  Orion  Network   Systems,   Inc.
           (Incorporated  by  reference  to exhibit  number 3.2 in  Registration
           Statement on Form 8-B filed with the Commission on January 31, 1997).

3.3        Certificate  of  Incorporation   of  Orion  Network   Systems,   Inc.
           (Incorporated  by  reference  to exhibit  number 3.1 in  Registration
           Statement No. 33-80518 on Form S-1).

3.4        Bylaws of Orion Network Systems,  Inc.  (Incorporated by reference to
           exhibit  number 3.2 in  Registration  Statement No.  33-80518 on Form
           S-1)*

3.5        Certificate of Incorporation of Orion Satellite Corporation. *

3.6        Bylaws of Orion Satellite Corporation. *

3.7        Certificate of Limited Partnership of International Private Satellite
           Partners, L.P. *

3.8        Form of Third Amended and Restated  Agreement of Limited  Partnership
           of International Private Satellite Partners, L.P. *

3.9        Certificate of Incorporation of OrionNet, Inc. *

3.10       Bylaws of OrionNet, Inc. *

3.11       Certificate of Incorporation of Orion Asia Pacific Corporation. *

3.12       Bylaws of Orion Asia Pacific Corporation. *

3.13       Certificate of Incorporation of OrionNet Finance Corporation. *

3.14       Bylaws of Orion Net Finance Corporation. *

3.15       Certificate   of    Incorporation   of   Asia   Pacific   Space   and
           Communications, Ltd. *

3.16       Bylaws of Asia Pacific Space and Communications, Ltd. *

3.17       Certificate of Incorporation of Orion Atlantic Europe, Inc. *

3.18       Bylaws of Orion Atlantic Europe, Inc. *

4.1        Form of Senior Note Indenture and Form of Note included therein.*

4.2        Form of Senior  Discount  Note  Indenture  and Form of Note  included
           therein. *

                                      II-6

<PAGE>

4.3        Form of Collateral Pledge and Security Agreement. *

4.4        INTENTIONALLY OMITTED

4.5        Form of Warrant  Agreement,  by and between  Orion and Bankers  Trust
           Company, and Form of Warrant included therein. *

4.6        Forms of  Warrant  issued by Orion.  (Incorporated  by  reference  to
           exhibit  number 4.1 in  Registration  Statement No.  33-80518 on Form
           S-1).

4.7        Forms of  Warrant  issued by Orion to  holders  of  Preferred  Stock.
           (Incorporated  by  reference  to exhibit  number 4.2 in  Registration
           Statement No. 33-80518 on Form S-1).

4.8        Forms  of  Certificate  of  Designation  of  Series  A 8%  Cumulative
           Redeemable  Convertible  Preferred  Stock,  Series  B  8%  Cumulative
           Redeemable  Convertible  Preferred  Stock and Series C 6%  Cumulative
           Redeemable  Convertible  Preferred Stock of Orion.  (Incorporated  by
           reference  to  exhibit  number  4.3  in  Registration  Statement  No.
           333-19795 on Form 8-B filed with the Commission on January 31, 1997).

4.9        Forms of  Series A  Preferred  Stock,  Series B  Preferred  Stock and
           Series C Preferred  Stock  certificates  of Orion.  (Incorporated  by
           reference  to  exhibit  number  4.4  in  Registration  Statement  No.
           333-19795 on Form S-4).

4.10       Form of Common Stock Certificate of Orion. (Incorporated by reference
           to exhibit number 4.5 in Registration Statement No. 333-19795 on Form
           S-4).

4.11       Form of Warrant issued to DACOM Corp.  (Incorporated  by reference to
           exhibit number 4.6 in  Registration  Statement No.  333-19795 on Form
           S-4).

4.12       Debenture  Purchase  Agreement,  dated January 13, 1997, with British
           Aerospace  and Matra  Marconi  Space.  (Incorporated  by reference to
           exhibit number 4.7 in  Registration  Statement No.  333-19795 on Form
           S-4 of Orion Newco Services, Inc.), as amended as of January 31, 1997
           (Incorporated  by reference to exhibit 10.4 in Current Report on Form
           8-K dated February 14, 1997).

5.1        Opinion of Hogan & Hartson L.L.P. *

8.1        Opinion  of Hogan &  Hartson  L.L.P.  with  respect  to  certain  tax
           matters. *

23.1       Consent of Ernst & Young LLP.

23.2       Consent of Hogan & Hartson  L.L.P.  (included  in the legal  opinions
           filed as Exhibits 5.1 and 8.1 hereto).

24.1       Powers  of  Attorney   (included  on  the  signature   pages  of  the
           Registration Statement).

*    Previously filed.


                                      II-7

<PAGE>

     (B) FINANCIAL STATEMENT SCHEDULES.

     Schedules  have been  omitted  because the  information  required to be set
forth therein is not applicable or is shown in the items incorporated  herein by
reference.

ITEM  17.  UNDERTAKINGS

     The undersigned registrant hereby undertakes:

     (1) To file,  during any period in which  offers or sales are being made, a
post-effective amendment to this registration statement:

          (i)  To include any  prospectus  required  by Section  10(a)(3) of the
               Securities Act of 1933;

          (ii) To reflect in the  prospectus  any facts or events  arising after
               the  effective  date of the  registration  statement (or the most
               recent post-effective  amendment thereof) which,  individually or
               in  the  aggregate,   represent  a  fundamental   change  in  the
               information   set   forth   in   the   registration    statement.
               Notwithstanding the foregoing, any increase or decrease in volume
               of  securities  offered (if the total dollar value of  securities
               offered  would not  exceed  that  which was  registered)  and any
               deviation  from  the low or  high  end of the  estimated  maximum
               offering  range may be reflected in the form of prospectus  filed
               with the Commission pursuant to Rule 424(b) if, in the aggregate,
               the  changes  in  volume  and price  represent  no more than a 20
               percent change in the maximum aggregate  offering price set forth
               in the  "Calculation of Registration  Fee" table in the effective
               registration statement; and

          (iii)To include any material  information  with respect to the plan of
               distribution   not  previously   disclosed  in  the  registration
               statement  or any  material  change to such  information  in this
               registration statement;

provided,  however,  that  subparagraphs  (i) and (ii) above do not apply if the
registration statement is on Form S-3, Form S-8 or Form F-3, and the information
required to be included in a  post-effective  amendment by those  paragraphs  is
contained in periodic  reports filed with or furnished to the  Commission by the
registrant  pursuant to Section 13 or Section 15(d) of the  Securities  Exchange
Act of 1934 that are incorporated by reference in this registration statement.

     (2) That, for the purpose of determining any liability under the Securities
Act of 1933,  each  such  post-effective  amendment  shall be deemed to be a new
registration  statement  relating  to the  securities  offered  herein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

     (3) To remove from registration by means of a post-effective  amendment any
of the securities being registered which remain unsold at the termination of the
offering.

     The undersigned registrant further undertakes that:

     For purposes of determining  any liability  under the  Securities  Act, the
information  omitted  from  the  form  of  Prospectus  filed  as  part  of  this
Registration  Statement  in reliance  upon Rule 430A and  contained in a form of
Prospectus  filed by  Registrant  pursuant  to Rule  424(b) (1) or (4) or 497(h)
under  the  Securities  Act  shall  be  deemed  to be part of this  Registration
Statement as of the time it was declared effective.

                                      II-8

<PAGE>

     For the purposes of determining  any liability  under the Securities Act of
1933, each filing of the registrant's annual report pursuant to Section 13(a) or
Section 15(d) of the  Securities  Exchange Act of 1934 that is  incorporated  by
reference  in  this  registration   statement  shall  be  deemed  to  be  a  new
registration  statement  relating to the Common Stock offered  therein,  and the
offering  of such  Common  Stock at that time shall be deemed to be the  initial
bona fide offering thereof.

     Insofar as indemnification for liabilities arising under the Securities Act
may  be  permitted  to  directors,  officers  and  controlling  persons  of  the
registrant pursuant to the foregoing  provisions,  or otherwise,  the registrant
has been advised that in the opinion of the Securities  and Exchange  Commission
such indemnification is against public policy as expressed in the Securities Act
and is, therefore,  unenforceable. In the event that a claim for indemnification
against such  liabilities  (other than the payment by the registrant of expenses
incurred or paid by a director,  officer or controlling person of the registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director,  officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as  expressed  in the  Securities  Act and will be  governed by the final
adjudication of such issue.

                                      II-9

<PAGE>


                                   SIGNATURES

     Pursuant  to  the  requirements  of  the  Securities  Act,  the  Registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing on Form S-3 and has duly  caused  this  Post-Effective
Amendment No. 1 to the Registration  Statement to be signed on its behalf by the
undersigned,  thereunto  duly  authorized,  in the City of  Rockville,  State of
Maryland on the 16th day of July, 1997.

                                       ORION NETWORK SYSTEMS, INC.


                                       BY: /s/ W. Neil Bauer
                                           -------------------------------------
                                           W. Neil Bauer
                                           President and Chief Executive Officer


                                POWER OF ATTORNEY

     Know  all Men by These  Presents,  that  each  individual  whose  signature
appears below  constitutes and appoints John G. Puente,  W. Neil Bauer and David
J. Frear, and each of them, his true and lawful attorney-in-fact and agent, with
power of substitution  and  resubstitution,  for him and in his name,  place and
stead,  in any and all  capacities,  to sign any and all  amendments  (including
post-effective  amendments) to this Registration Statement,  and to sign any and
all related  registration  statements pursuant to the Securities Act of 1933, as
amended,  and to file the same, with all exhibits thereto and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing  requisite  and necessary to be done
in and about the  premises,  as fully to all intents and purposes as he might or
could do in person,  hereby ratifying and confirming all that said attorneys-in-
fact and agents, or any of them, or their, his or her substitutes or substitute,
may lawfully do or cause to be done by virtue hereof.

     Pursuant to the  requirements  of the  Securities  Act of 1933, as amended,
this  Registration  Statement has been signed below by the following  persons in
the capacities and on the dates indicated.


Signature                                 Title                       Date

/s/ W. Neil Bauer                     Chief Executive              July 16, 1997
- -------------------------------     Officer and Director
W. Neil Bauer, President         (Principal Executive Officer)


/s/ David J. Frear                    Chief Financial              July 16, 1997
- ------------------------------      Officer and Treasurer
David J. Frear, Vice President   (Principal Financial Officer
                                and Principal Accounting Officer)


/s/ Gustave M. Hauser                     Director                 July 16, 1997
- ------------------------------
Gustave M. Hauser, Chairman


                                     II-10

<PAGE>


/s/ John V. Saeman                      Director                   July 16, 1997
- ------------------------------
John V. Saeman


/s/ John G. Puente                      Director                   July 16, 1997
- ------------------------------
John G. Puente


/s/ Richard J. Brekka                   Director                   July 16, 1997
- ------------------------------
Richard J. Brekka


/s/ Warren B. French, Jr.               Director                   July 16, 1997
- ------------------------------
Warren B. French, Jr.


/s/ Sidney S. Kahn                      Director                   July 16, 1997
- ------------------------------
Sidney S. Kahn


                                        Director                _______ __, 1997
- ------------------------------
W. Anthony Rice


                                        Director                _______ __, 1997
- ------------------------------
Robert M. Van Degna


/s/ Barry Horowitz                      Director                   July 16, 1997
- ------------------------------
Barry Horowitz




                                                                    EXHIBIT 23.1

                         CONSENT OF INDEPENDENT AUDITORS


We  consent to the  reference  to our firm under the  caption  "Experts"  in the
Registration Statement  (Post-effective  Amendment No. 1 to Form S-1 on Form S-3
No.  333-19167) and related  Prospectus of Orion Network  Systems,  Inc. for the
registration of 697,400 shares of its common stock and to the  incorporation  by
reference  therein  of our  report  dated  March 7,  1997,  with  respect to the
consolidated  financial  statements of Orion Network  Systems,  Inc. (a Delaware
corporation  that is now known as Orion Oldco  Services,  Inc.)  included in its
Annual  Report  (Form 10-K and  amendment  thereto on Form  10-K/A) for the year
ended December 31, 1996, filed with the Securities and Exchange Commission.


                                                               ERNST & YOUNG LLP


Washington, D.C.
July 24, 1997



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