January 6, 1997




Board of Directors
Orion Network Systems, Inc.
2440 Research Boulevard, Suite 400
Rockville, Maryland 20850

Dear Directors:

This letter is in response to your  request that we provide you with our opinion
as  to  certain  of  the  Federal  income  tax   consequences  of  the  proposed
reorganization of Orion Network Systems,  Inc. ("Orion"),  Orion Newco Services,
Inc.  ("Orion  Newco"),  a newly formed  Delaware  corporation  and wholly owned
subsidiary of Orion, and Orion Merger Company, Inc. ("Orion Merger Subsidiary"),
a newly formed Delaware  corporation and wholly owned subsidiary of Orion Newco,
pursuant to the  Agreement and Plan of Merger,  dated as of December,  1996 (the
"Merger Agreement"), by and among Orion, Orion Newco and Orion Merger Subsidiary
(the "Merger").  

In rendering our opinion,  we have also considered the proposed  transfer of (i)
limited partnership interests in International Private Satellite Partners, L.P.,
a Delaware limited  partnership ("Orion Atlantic") and (ii) a portion of certain
refund  rights,  contractual  rights  and debt  instruments  under  which  Orion
Atlantic is the  obligor,  to Orion Newco in exchange  for shares of Series C 6%
Cumulative  Redeemable  Convertible Preferred Stock of Orion Newco ("Orion Newco
Series C Preferred  Stock")  pursuant to the Section (1) 351 Exchange  Agreement
and Plan of  Conversion  (the  "Exchange  Agreement"),  dated as of June , 1996,
among Orion,  Orion  Satellite  Corporation,  a Delaware  corporation  that is a
wholly owned subsidiary of Orion and the sole general partner of Orion Atlantic,
and each of the existing limited partners of Orion Atlantic other than Orion (2)
(the "Exchange").

In rendering  our opinions,  we have relied upon the facts and  representations,
summarized  below,  as they  have been  represented  to us or  described  in the
following documents (the "Documents"):

1. Agreement  and Plan of  Merger,  as  approved  by the Board of  Directors  on
   January 3, 1997;
- ----------
1
   All "Section"  references in this letter are to the Internal  Revenue Code of
   1986, as amended.
2  
   The limited partners in Orion Atlantic other than Orion are British Aerospace
   Communications,  Inc. ("BAe"), COM DEV Satellite  Communications Limited (COM
   DEV"), Kingston Communications  International Limited ("Kingston"),  Lockheed
   Martin Commercial Launch Services,  Inc. ("Lockheed Martin CLS"), MCN Sat US,
   Inc.  ("Matra"),  and Trans Atlantic Satellite,  Inc. ("Nisho").  All limited
   partnerss  except for Orion  will be taking  part in the  Exchange  and those
   partners  taking part in the Exchange will  hereinafter be referred to as the
   "Exchanging Partners".








Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 2


2. The Section 351 Exchange Agreement and Plan of Conversion,  dated as of June,
   1996;
3. The  First  Amendment  to the  Section  351  Exchange  Agreement  and Plan of
   Conversion, dated as of December, 1996;
4. The  Proposed  Amendment  to  Preliminary  Schedule  14A as  filed  with  the
   Securities  and  Exchange   Commission  on  December  30,  1996  (the  "Proxy
   Statement"); and
6. The letter  dated  December  27,  1996 from  management  of Orion  containing
   certain representations regarding the Merger (the "Representation Letter").

The  management of Orion has  represented  to us that the  Documents  provide an
accurate,  true,  and complete  description of the entire  understanding  of the
parties with respect to the subject  matter thereof and are true and complete in
all material  respects.  Also, the management of Orion has represented  (without
our independent investigation) that the Merger and Exchange and any transactions
incident  thereto  will  occur  in  strict  accordance  with  the  terms  of the
Documents.  We have made no independent  determination  regarding such facts and
circumstances   and,   therefore,   have   relied   upon  the   statements   and
representations of management and the information presented in the Documents for
purposes of this letter. Any changes to the Documents or to such facts or to the
assumptions set forth in this letter may affect the opinions stated herein.

I.       STATEMENT OF FACTS

The management of Orion has represented the following to us:

         A.       In General

Orion, together with its subsidiaries, is a provider of private network services
to  multinational  corporations.  More  specifically,  Orion has  developed  and
operates a privately  owned  international  satellite  communications  business,
which  delivers  two  distinct  types of  services:  (i) private  communications
networks for multinational  businesses and (ii) transmission  capacity for video
and other program distribution services.

As of December 15, 1996,  Orion's capital structure  consisted of (i) 40,000,000
authorized shares of voting common stock, 10,974,121 shares of which were issued
and outstanding,  (ii) 15,000 authorized shares of convertible redeemable Series
A  Preferred  Stock,  13,871  shares of which  were  outstanding  and  currently
entitled to vote on the election of directors and all other  matters  proper for
shareholder  consideration  on an  "as  converted"  basis,(3)  and  (iii)  5,000
authorized shares of convertible  redeemable Series B Preferred Stock,  4,298 of
which were outstanding and

- ---------
3 
   Each share of the Series A Preferred  stock  entitles its holder to 117 votes
   because  each share of the Series A Preferred  can be converted to 117 shares
   of  common  stock.  Thus,  the  outstanding  shares  of  Series  A  preferred
   constitute an aggregate of 1,622,907 votes.



Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 3

currently  entitled to vote on the election of directors  and all other  matters
proper  for  shareholder  consideration  on an "as  converted"  basis.(4)  As of
September 30, 1996, there are only 6 shareholders who beneficially own more than
five percent of the outstanding common stock of Orion. The Orion common stock is
traded over-the-counter and quoted on the NASDAQ System.


Orion is the  common  parent of an  affiliated  group of  corporations  filing a
consolidated  Federal  income tax return on the basis of a December  31 year end
("Orion Group").  Other members of the Orion Group include:  Orion Newco;  Orion
Merger Subsidiary; Asia Pacific Space & Communications, Ltd.; Orion Asia Pacific
Corp.  ("Orion Asia  Pacific")(5);  Orion  Satellite  Corporation  ("OrionSat");
OrionNet, Inc. ("OrionNet"); and OrionNet Finance Corporation.

Orion Newco is currently a  wholly-owned  subsidiary  of Orion.  Orion Newco was
formed  solely for the purpose of effecting  the Merger and Exchange and has not
conducted any business since  incorporation  other than matters  incident to its
organization   and  matters  incident  to  the  Merger  Agreement  and  Exchange
Agreement.  While Orion Newco currently conducts no business, upon completion of
the Merger as described  below, its business  activities will initially  include
the operations  currently  conducted by Orion.  The authorized  capital stock of
Orion Newco  consists of 40,000,000  shares of common stock,  par value $.01 per
share, and 1,000,000  shares of preferred stock, par value $.01 per share.  Each
holder of Orion  Newco  common  stock is entitled to one vote per share of Orion
Newco  common  stock held by such  holder on all matters to be voted upon by the
stockholders of Orion Newco.  The holders of Orion Newco preferred stock will be
entitled to one vote for each whole share of Orion Newco common stock that would
be issuable upon  conversion of such share of Orion Newco preferred stock on all
matters  submitted to the  stockholders  of Orion Newco.  Immediately  after the
Merger and  Exchange,  Orion Newco will have  outstanding  10,973,018  shares of
Orion Newco common stock, 13,871 shares of Orion Newco Series A Preferred Stock,
4,298  shares of Orion Newco  Series B Preferred  Stock,  and 121,988  shares of
Orion  Newco  Series C Preferred  Stock  (subject  to  possible  adjustment,  as
discussed below). The terms,  rights and preferences of the Orion Newco Series A
Preferred  and Orion Newco Series B Preferred  will be identical in all respects
to the terms,  rights and  preferences  of the Series A Preferred  Stock and the
Orion Series B Preferred Stock, respectively.

- ----------
4
   Each share of the Series B  Preferred  stock  entitles  it holder to 98 votes
   because each share of the Series B Preferred can be converted to 98 shares of
   common stock. Thus, the outstanding  shares of Series A preferred  constitute
   an aggregate of 421,204 votes.
5
   Presently,  Orion owns  approximately  83% of the total  outstanding stock of
   Orion Asia Pacific.  As noted below,  as a condition to the  Exchange,  Orion
   Newco will issue  approximately  86,000 shares of common stock to acquire the
   remaining  outstanding  shares of stock of Asia Pacific  which are  currently
   owned by an affiliate of BAe.


Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 4


Orion Merger  Subsidiary  was  organized  solely for the purpose of merging with
Orion in  accordance  with the Merger  Agreement.  Orion Merger  Subsidiary  has
engaged  in  no  business   activities   other  than  matters  incident  to  its
organization   and  matters  incident  to  the  Merger  Agreement  and  Exchange
Agreement.  The authorized capital stock of Orion Merger Subsidiary  consists of
1,000  shares of common  stock.  Immediately  before the Merger of Orion  Merger
Subsidiary with and into Orion,  Orion Merger  Subsidiary's  assets will consist
solely  of cash  contributed  by  Orion  Newco  in  exchange  for  Orion  Merger
Subsidiary's stock.  Immediately after the Merger,  Orion Newco will be the sole
shareholder  of Orion,  owning  100% of the  issued  and  outstanding  shares of
Orion's common and preferred stock.

OrionSat  is the sole  general  partner  of  Orion  Atlantic  with a 25%  equity
interest.  The  limited  partners  in  Orion  Atlantic  include  Orion  and  the
Exchanging Partners.


         B.       Business Purpose

Management has represented  that the proposed Merger will permit the acquisition
of the LPIs and  Partnership  Debt  (hereinafter  defined)  in that,  absent the
formation  of Orion  Newco,  Exchanging  Partners  owning  significant  LPIs and
Partnership  Debt have indicated they are not willing to exchange their LPIs and
Partnership Debt for Orion stock. Accordingly, the Merger has been structured to
accommodate  the wishes of the  Exchanging  Partners and permit Orion to acquire
all the capital and profits  interests in Orion Atlantic not presently  owned by
the Orion Group.

In addition,  the Proxy  states that the Merger and the Exchange  (collectively,
the "Transactions") will provide the following additional benefits: (i) simplify
Orion's  organizational  structure  and  improve  Orion's  access to the capital
markets;  (ii)  consolidate  outside  investor  ownership at the holding company
(Orion Newco) level;  (iii) improve the speed and efficiency of Orion's decision
making;  (iv)  provide  Orion Newco with 100%  ownership  of all of its material
subsidiaries;  (v) allow Orion Newco to pursue  independently its business plans
and financing for all of its  satellites;  (vi) eliminate (in exchange for Orion
Newco  Stock)  approximately  $37.5  million  (as  of  September  30,  1996)  of
obligations  Orion  Atlantic  owes  to the  Exchanging  Partners  under  various
agreements; and (vii) increase Orion's overall market capitalization.

Access to the capital  markets is  necessary  for Orion to achieve its  business
plan to construct and launch two additional satellites.  With this plan in mind,
Orion Newco has been  pursuing  and will  continue to pursue  various  financing
transactions including: (i) an offering of investment units consisting of senior
notes and common stock  warrants in the amount of  approximately  $322  million;
(ii) the  issuance  and  sale of  approximately  $60  million  of Orion  Newco's
convertible  subordinated  debentures  to  BAe  and  Matra;  (iii)  a  satellite
procurement contract for the Orion 2 Satellite; and (iv) a satellite procurement
contract for the Orion 3 Satellite.  Orion  believes that the  construction  and
launch of Orion 2 and Orion 3 will offer  stockholders an opportunity to 



Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 5



realize  long-term  value  through the  potential  appreciation  in the value of
Orion's stock. The Proxy states that Orion believes that it would not be able to
complete these financings in the absence of the Transactions.

              C. Merger


Pursuant to the Merger,  (i) Orion  Merger  Subsidiary  will merge with and into
Orion as provided in the relevant  provisions  of the Delaware  merger  statute,
with  Orion  being  the  surviving   corporation  and  Orion  Merger  Subsidiary
disappearing in connection with the Merger,  and (ii) each share of common stock
of Orion outstanding  immediately prior to the effective date of the Merger will
be  automatically  canceled and  converted by operation of law into one share of
Orion Newco Common  Stock.  In addition,  each share of Orion Series A Preferred
Stock and Series B Preferred  Stock will be canceled and  converted by operation
of law into one share of Orion  Newco  Series A  Preferred  Stock  and  Series B
Preferred  Stock,  respectively,  having  the same terms as the  canceled  Orion
preferred stock. The shares of Orion Newco stock originally issued to Orion will
be canceled. Each share of Orion Merger Subsidiary common stock will be canceled
and converted into one share of Orion common stock, which shall not be converted
into Orion Newco common stock.  Following consummation of the Merger, Orion will
be a  wholly-owned  subsidiary  of Orion Newco and the Orion  shareholders  will
automatically  become holders of all of the outstanding  stock of Orion Newco in
the same proportion of ownership that they had in Orion.  Any outstanding  stock
options which Orion may have granted pursuant to its stock option plans shall be
assumed by Orion  Newco and will  become  stock  options of Orion Newco upon the
same terms as applied prior to the Merger.

According to the Proxy Statement, the Merger, if approved, will become effective
upon the filing with the  Delaware  Secretary  of State of the  Delaware  Merger
Certificate,  which is expected to occur following  approval of the Transactions
by the requisite vote of the Orion  stockholders,  and satisfaction or waiver of
the  other  conditions  set  forth  in the  Merger  Agreement  and the  Exchange
Agreement (the "Effective Time of the Merger").

According to the Proxy Statement,  it is expected that approximately  10,974,121
shares of Orion  Newco  Common  Stock,  13,871  shares of Orion  Newco  Series A
Preferred  Stock,  and 4,298 shares of Orion Newco Series B Preferred Stock will
be issued to the  stockholders  of Orion in the  Merger  in  exchange  for their
shares of Orion Common Stock,  Orion Series A Preferred Stock and Orion Series B
Preferred  Stock,   respectively.   Orion  Newco  will  have  a  certificate  of
incorporation,  bylaws,  capital  structure  (before the issuance of Orion Newco
Series C Preferred Stock, as discussed in D. below) and management substantially
identical in all material respects to those of Orion. As a result of the Merger,
the stockholders of Orion Newco will have  substantially the same securities and
rights in Orion  Newco  that they had in Orion,  except  that  their  percentage
ownership of Orion Newco will be diluted as a result of the Exchange  (discussed
immediately  below).  The  Proxy  states  that  Orion  stockholders  will not be
entitled to appraisal 


Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 6


rights in connection with the approval of the Merger.

         D.       Exchange

Pursuant to the terms of the Exchange  Agreement,  and subject to and  effective
upon the  consummation  of the Merger,  Orion Newco will issue 121,988 shares of
Series C 6% Cumulative Redeemable  Convertible Preferred Stock (the "Orion Newco
Series C Preferred Stock") to the Exchanging Partners. In exchange for the Orion
Newco Series C Preferred Stock,  the Exchanging  Partners will transfer to Orion
Atlantic the following  rights  currently held by the Exchanging  Partners:  (i)
their  respective  limited  partnership  interests  in Orion  Atlantic and other
rights and  obligations  relating  thereto under the Second Amended and Restated
Partnership  Agreement of International  Private Satellite  Partners,  L.P. (the
"LPIs");  (ii)  all of  the  rights  and  obligations  held  by  certain  of the
Exchanging  Partners  under the  Refund  Agreement,  dated  December  31,  1994,
consisting  primarily  of rights to receive  an  aggregate  of $26.7  million of
refunds  thereunder;  (iii) all the rights of BAe, COM DEV,  Kingston,  Lockheed
Martin CLS and Matra under the Preferred  Participating Unit Agreements ("PPUA")
among OrionSat and such Exchanging  Partners,  consisting primarily of rights to
receive  repayment of $6.6 million advanced  thereunder and  approximately  $4.3
million  of  interest  accrued  on such  advances;  (iv)  all of the  Exchanging
Partners' rights under the Preferred Bidders  Agreement  consisting of preferred
bidder  status  with  respect to  procurement  contracts  entered  into by Orion
Atlantic;  and (v) certain of the Exchanging Partners' rights under a variety of
other agreements  between or among Orion Atlantic and the Limited Partners.  The
contractual and refund rights referred to in clauses (ii),  (iii),  (iv) and (v)
of the  preceding  sentence  are  collectively  referred to as the  "Partnership
Debt."

Pursuant to the Exchange,  Orion Newco will transfer to the Exchanging  Partners
the following number of shares of Orion Newco Series C Preferred Stock:

                  Exchanging Partner                Number of Shares
          BAe                                             50,129
          COM DEV                                          9,462
          Kingston                                        11,198
          Lockheed Martin CLS                             19,534
          Matra                                           17,727
          Nissho                                          13,938
                                              ------------------
                                                         121,988
                                              ==================


The above number of shares will be increased by an amount  pursuant to a formula
based upon payments by the  Exchanging  Partners under various  agreements,  and
adjusted  proportionately  to  reflect  any  subdivision,   stock  split,  stock
dividend, recapitalization,  combination or reverse stock 



Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 7



split of Orion capital stock or similar transaction by Orion between the date of
the Exchange Agreement (June, 1996) and the consummation of the Exchange.

As a result of the  Exchange,  the Orion  Group will become the owner of all the
LPIs in Orion Atlantic  (through  Orion Newco and Orion as limited  partners and
OrionSat  as  the  sole  general  partner  of  Orion  Atlantic)  and  all of the
Partnership Debt.

The Series C Preferred  Stock will be entitled to receive  dividends at the rate
of 6% per annum,  payable exclusively in Orion Newco Common Stock. Each share of
Series C Preferred Stock will have a liquidation  preference of $1,000 per share
(plus all accrued and unpaid  dividends) over the Orion Newco Common Stock.  The
holders of the Orion Newco Series C Preferred  Stock will be entitled to vote on
the basis of one vote for each  whole  share of Orion  Newco  Common  Stock that
would  be  issuable  upon  conversion  of such  share of  Orion  Newco  Series C
Preferred  Stock at the time the vote is taken.  Orion  Newco will redeem all of
the Orion Newco Series C Preferred  Stock on the 25th  anniversary  of issuance,
2022. Additionally,  at any time after the second anniversary of the date of the
issuance  of  the  Orion  Newco  Series  C  Preferred  Stock  (or,  if  earlier,
immediately  prior to the consummation of any  consolidation,  merger or sale in
which the  successor  entity or  purchasing  entity is other than Orion  Newco),
Orion  Newco has the option to redeem the Orion Newco  Series C Preferred  Stock
(in whole or in part) at a price of $1,000 per share plus all accrued and unpaid
dividends. Holders of the Orion Newco Series C Preferred Stock have the right to
convert  their  shares  into a number  of  shares of Orion  Newco  Common  Stock
generally  equal to a number  computed  by  multiplying  the number of shares of
Orion Newco Series C Preferred Stock to be converted by $1,000, and dividing the
result  by the  applicable  Conversion  Price  (as  such  term  is  used  in the
Certificate of  Designations),  initially  $17.50,  subject to  adjustment.  The
121,988 shares of Orion Newco Series C Preferred  Stock expected to be issued in
the Exchange will be convertible into approximately  7,933,319 million shares of
Orion Newco  Common  Stock.  Finally,  if the  closing  price of the Orion Newco
Common  Stock over 20 of the 30 prior  trading  days is greater than or equal to
the conversion price of $17.50 (subject to adjustment),  Orion Newco may require
the conversion of all of the  outstanding  Orion Newco Series C Preferred  Stock
into Orion Newco Stock.

Section 3.2(c) of the Exchange  Agreement  provides that the number of shares of
Orion Newco Series C Preferred Stock will be increased by the Adjustment Amount.
The  Adjustment  Amount for an Exchanging  Partner will equal (i) the sum of (A)
the amounts  paid by such  Exchanging  Partner for  obligations  pursuant to the
Capacity  Agreement  which  are  subject  to being  refunded  under  the  Refund
Agreement,  and the  amounts  paid by such  Exchanging  Partner  pursuant to the
Contingent Capacity  Agreement,  during the period from July 1, 1996 through the
Closing  Date (as  defined in the  Exchange  Agreement),  plus (B) the amount of
interest  accrued  with  respect to funds  advanced by such  Exchanging  Partner
pursuant to the PPU  Agreement,  minus (ii) the product of the number of days in
the Adjustment  Period through and including (but not beyond)  January 29, 1997,
multiplied by the Tax Adjustment Factor for such Exchanging Partner,  



Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 8


divided by (iii)  $1,000.  The Tax  Adjustment  means,  with respect to (i) BAe,
$11,634;  (ii) COM DEV, $1,940;  (iii) Kingston,  $1,940;  (iv) Lockheed Martin,
$3,878; (v) MCN Sat, $3,878; and (vi) TA Sat, $3,878.

The First  Amendment to Section 351 Exchange  Agreement  and Plan of  Conversion
("First  Amendment") amended Section 3.2(c) of the Exchange Agreement to provide
that if the Closing Date for the Exchange  occurs after  January 29, 1997,  then
any payments made by the  Exchanging  Partners which are subject to refund under
the  Refund  Agreement  and any  payments  made  under the  Contingent  Capacity
Agreements  will be refunded to the Exchanging  Partners to the extent  proceeds
from the Bond Offering  contemplated  by the Exchange  Agreement  plus the gross
proceeds from the sale of convertible  subordinated debentures to BAe and Matra,
exceed the sum of: (i) the amount  necessary to refinance  the credit  facility;
(ii) $49.4 million payments to be made by Orion or Orion Newco under the Orion 2
Satellite  Contract;  (iii) $13  million  incentive  payments  payable  to Matra
immediately following the refinancing of the credit facility;  (iv) $3.5 million
payable to STET  immediately  following the refinancing of the credit  facility;
(v)  reasonably  amount  necessary for working  capital;  and (vi) the costs and
expenses of the Bond Offering, the convertible subordinated debenture financings
and related  transactions.  If such excess is not  sufficient to refund all such
post-closing  payments  in  full,  the  excess  will be  used  first  to  refund
Contingent Capacity Payments,  and second to refund Firm Capacity Payments.  Any
funds then  remaining will be used to make partial  refunds,  pro rata among the
Exchanging Partners in proportion to their respective post-closing payments. Any
amounts so refunded will not be taken into account in  determining  any required
adjustment described in the preceding paragraph.


         E.       Mutual Interdependence of Exchange and Merger

The Proxy  requests the  shareholders  of Orion to consider and vote  separately
upon the Merger and the Exchange. However, the Proxy states that the Exchange is
a condition to the  completion  of the Merger,  and the Merger is a condition to
the completion of the Exchange, as provided in the Merger Agreement and Exchange
Agreement.  In addition, as is set forth in the Proxy Statement,  the Merger and
Exchange are  pursuant to the same plan,  and the Merger is  undertaken  for the
principal  purpose of enabling  Orion to acquire the LPIs and  Partnership  Debt
pursuant to the Exchange.

 II. REPRESENTATIONS

Set  forth  below  are   representations   made  by  the   management  of  Orion
("Management")  on which we have relied in concluding that the Merger  satisfies
the  requirements of Section  368(a)(2)(E)  of the Internal  Revenue of 1986, as
amended (the "Code"):

1.  The Merger of Orion Merger  Subsidiary  with and into Orion will satisfy all
    of the







Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 9

    requirements  for treatment as a statutory merger under applicable state law
    and regulations thereunder, and as a consequence of the Merger, Orion Merger
    Subsidiary will disappear and Orion will be the surviving  corporation  with
    its charter intact.

2.  The fair market  value of the Orion Newco stock to be received by each Orion
    shareholder  will be equal  to the fair  market  value  of the  Orion  stock
    surrendered in the Merger.

3.  Upon  consummation of the Merger,  certificates  evidencing Orion stock will
    represent, by operation of law, the same number and class of shares of Orion
    Newco  stock and will no longer  represent  a direct  ownership  interest in
    Orion.

4.  There is no plan or intention by the shareholders of Orion who own (directly
    or  indirectly,  such as by  reason of the  ownership  of stock  options  or
    convertible preferred stock) five percent or more of the Orion common stock,
    and, to the best of Orion  management's  knowledge  and belief,  there is no
    plan or intention on the part of the  remaining  shareholders  of Orion,  to
    sell, exchange, or otherwise dispose of (or enter into any other arrangement
    designed to limit the appreciation in value of, or risk of loss with respect
    to) a number of shares of Orion Newco stock received in the transaction that
    would reduce the shareholders' ownership of Orion Newco stock to a number of
    shares having a fair market value,  as of the Effective  Time of the Merger,
    of less  than 50  percent  of the  total  fair  market  value  of all of the
    formerly  outstanding  common  and  preferred  stock of Orion as of the same
    date.  Moreover,  shares of Orion stock and shares of Orion Newco stock held
    by Orion shareholders and otherwise sold, redeemed,  or disposed of prior to
    or  subsequent  to the Merger  which are part of the plan of Merger  will be
    considered in making this representation.

5.  Following the Merger, Orion will hold at least 90 percent of the fair market
    value of its net 2. assets and at least 70 percent of the fair market  value
    of its gross  assets  and at least 90 percent  of the fair  market  value of
    Orion Merger Subsidiary's net assets and 70 percent of the fair market value
    of Orion  Merger  Subsidiary's  gross assets held  immediately  prior to the
    Merger. For purposes of this representation,  amounts (if any) paid by Orion
    or Orion Merger  Subsidiary  to  dissenters,  amounts paid by Orion or Orion
    Merger  Subsidiary  to  shareholders  who  receive  cash or other  property,
    amounts  used by Orion  or Orion  Merger  Subsidiary  to pay  reorganization
    expenses, and all redemptions and distributions (except for regular,  normal
    dividends) made by Orion will be included as assets of Orion or Orion Merger
    Subsidiary, respectively, immediately prior to the Merger.

6.  Prior  to the  Merger,  Orion  Newco  will be in  control  of  Orion  Merger
    Subsidiary within the meaning of Section 368(c) of the Code.

7.  Orion Newco was formed  solely for the purpose of  effecting  the Merger and
    has not


Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 10

    conducted any business since  incorporation  other than matters  incident to
    its  organization  and matters incident to the Merger Agreement and Exchange
    Agreement.

8.  Following  the Merger,  Orion Newco will own all the issued and  outstanding
    stock of Orion. Orion has no plan or intention to issue additional shares of
    its stock that would  result in Orion Newco  losing  control of Orion within
    the meaning of Section 368(c) of the Code.

9.  Orion Newco has no plan or intention to redeem or otherwise reacquire any of
    its stock issued in the Merger.

10. Orion  Newco will  remain in  existence.  There is no plan or  intention  to
    liquidate   Orion  Newco;   to  merge  Orion  Newco  with  or  into  another
    corporation;  or to cause Orion Newco to sell or otherwise dispose of any of
    its assets or of any of the assets  acquired  from Orion Merger  Subsidiary,
    except for dispositions made in the ordinary course of business or transfers
    of assets to a corporation controlled by Orion.

11. There is no plan or  intention  on the part of Orion,  Orion  Newco,  or any
    other  person  to  liquidate  Orion;  to merge  Orion  with or into  another
    corporation; to sell or otherwise dispose of the stock of Orion; or to cause
    Orion to sell or  otherwise  dispose  of any of its  assets or of any of the
    assets acquired from Orion Merger  Subsidiary,  except for dispositions made
    in the ordinary  course of business or transfers of assets to a  corporation
    controlled by Orion.

12. No holder of any  issued or  outstanding  Orion  stock will be  entitled  to
    exercise  dissenters'  or appraisal  rights in  connection  with the Merger;
    rather,  the only  consideration  any Orion  stockholder will be entitled to
    receive in connection with the Merger will be shares of Orion Newco stock.

13. Orion Merger Subsidiary was organized solely for the purpose of merging with
    Orion in accordance with the Merger  Agreement and Exchange  Agreement,  and
    has engaged in no 2. business  activities other than matters incident to its
    organization  and matters  incident  to the Merger  Agreement  and  Exchange
    Agreement.

14. Orion Merger Subsidiary will have no liabilities  assumed by Orion, and will
    not transfer to Orion any assets subject to liabilities, in the Merger.

15. Following  the Merger,  Orion will  continue its historic  business or use a
    significant portion of its historic business assets in a business.

16. Orion Newco, Orion Merger  Subsidiary,  Orion, and the shareholders of Orion
    will pay their respective expenses,  if any, incurred in connection with the
    Merger.


Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 11



17. There is no  intercorporate  indebtedness  existing  between Orion Newco and
    Orion or  between  Orion  Merger  Subsidiary  and  Orion  that  was  issued,
    acquired, or will be settled at a discount.

18. Each class of issued and outstanding  stock of Orion currently  entitles its
    holders  to vote in the  election  of  directors  of Orion  and on all other
    matters  that are  subject  to  shareholder  approval  under the  applicable
    provisions  of Delaware  corporate  law,  and there is no class of nonvoting
    stock of Orion  that is or will be issued and  outstanding  on or before the
    date of the Merger.  Taking into account any shares of Orion stock  acquired
    by Orion or Orion Newco for  consideration  other than voting stock of Orion
    Newco,  Orion  Newco will  acquire at least 80% of the total  shares of each
    class of Orion stock solely in exchange for shares of Orion Newco stock that
    currently entitles its holders to vote in the election of directors of Orion
    Newco and on all other  matters  that are  subject to  shareholder  approval
    under the applicable  provisions of Delaware  corporate law. Orion Newco has
    no plan or intention  to modify any of the voting  rights or other terms and
    provisions of any class of Orion Newco stock issued pursuant to the Merger.

19. At the time of the Merger,  Orion will not have  outstanding  any  warrants,
    options,  convertible  securities,  or any other type of right  pursuant  to
    which any person  could  acquire  stock in Orion and that,  if  exercised or
    converted, would affect Orion Newco's acquisition or retention of control of
    Orion, as defined in Section 368(c) of the Code.


20. Orion Newco does not own, nor has it owned  during the past five years,  any
    shares of the stock of Orion.

21. No two parties to the  transaction  are  investment  companies as defined in
    Section 368(a)(2)(F)(iii) and (iv) of the Code.

22. Orion is not under the jurisdiction of a court in a Title 11 or similar case
    within the meaning of Section 368(a)(3)(A) of the Code.


23. The facts and representations relating to the Transactions described in this
    opinion  letter and the  Documents  are true,  correct,  and complete in all
    material respects.




Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 12




III.   ANALYSIS


         A.       Statutory Requirements

Section 368(a)(1)(A) of the Code provides that the term "reorganization" means a
statutory merger or consolidation.  Management has represented that the proposed
merger  of Orion  Merger  Subsidiary  with  and into  Orion  will  qualify  as a
statutory merger under the applicable  state law. Based on this  representation,
this requirement will be met.

Section  368(a)(2)(E)  of the Code provides that a transaction  which  otherwise
qualifies under Section  368(a)(1)(A)  will not be disqualified by reason of the
fact that stock of a corporation (the  "controlling  corporation")  which before
the merger was in control of the merged  corporation is used in the transaction,
if:

         (i)      After the  transaction,  the corporation  surviving the merger
                  holds   substantially  all  of  the  surviving   corporation's
                  properties  and  substantially  all of the  properties  of the
                  merged  corporation  (other  than  stock  of  the  controlling
                  corporation distributed in the transaction); and

         (ii)     In the  transaction,  former  shareholders  of  the  surviving
                  corporation  exchange,  for an amount  of voting  stock of the
                  controlling  corporation,  an amount of stock in the surviving
                  corporation which constitutes control of such corporation.

Section  1.368-2(j)(3)(iii)  of the Income  Tax  Regulations  ("Regulations"  or
"Treas.  Reg.")  provides  that for purposes of Section  368(a)(2)(E)(i)  of the
Code,  the  term  "substantially  all"  has the same  meaning  as under  Section
368(a)(1)(C).  Rev.  Proc.  77-37,  1977-2 C.B. 568,  provides that, for advance
ruling purposes, the "substantially all" requirement of Section  368(a)(2)(E)(i)
is satisfied if there is a retention of assets  representing at least 90 percent
of the fair  market  value of the net assets and at least 70 percent of the fair
market value of the gross assets held by the surviving  corporation  immediately
prior to the  transfer.  (This amount of assets of the merged  corporation  must
also be  transferred to and retained by the surviving  corporation.)  Management
has represented  that after the Merger,  Orion will hold assets  representing at
least 90  percent of the fair  market  value of the net assets and 70 percent of
the  gross  assets  of  Orion  and  Orion  Merger  Subsidiary.   Based  on  this
representation, the "substantially all" requirement will be met.

For purposes of Section  368(a)(2)(E) of the Code, the term "control" is defined
in Section  368(c) as ownership of stock  possessing  at least 80 percent of the
total  combined  voting  power of all  classes of stock  entitled to vote and at
least 80 percent of the total number of shares of all other  


Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 13


classes  of stock  of the  corporation.  Pursuant  to the  terms  of the  Merger
Agreement,  prior to the merger of Orion Merger  Subsidiary with and into Orion,
Orion  Newco will own all of the issued and  outstanding  stock of Orion  Merger
Subsidiary.  Consequently,  Orion  Newco  will  be  in  control  of  Orion  and,
therefore,  will be the "controlling  corporation" within the meaning of Section
368(a)(2)(E).

Finally, as discussed above,  "control" for purposes of Section  368(a)(2)(E) is
defined in Section  368(c) as ownership of stock  possessing at least 80 percent
of the total combined  voting power of all classes of stock entitled to vote and
at least 80 percent of the total number of shares of all other  classes of stock
of the corporation.  Pursuant to the Merger Agreement, the existing shareholders
of Orion will exchange Orion stock  possessing more than 80% of the voting power
of all  classes  of  Orion  voting  stock  (which  constitutes  all  of  Orion's
outstanding stock) solely for voting stock of Orion Newco. Therefore,  the Orion
stock that is  converted  into Orion Newco stock upon the merger of Orion Merger
Subsidiary  with and into Orion  will  constitute  control of Orion  immediately
before the Merger within the meaning of Section 368(a)(2)(E)(ii).

The IRS has  published a ruling  which  analyzes  the  applicability  of Section
368(a)(2)(E) of the Code to a situation  similar to the proposed Merger. In Rev.
Rul. 77-428, 1977-2 C.B. 117, corporation P formed a subsidiary corporation, S1,
which in turn formed subsidiary corporation S2. Pursuant to a plan of merger, S2
merged with and into P, with P being the surviving  corporation.  On the date of
the merger all  outstanding  shares of P stock not held by S1 were exchanged for
shares of S1  stock.  Thus,  P became a wholly  owned  subsidiary  of S1 and the
former P shareholders became the shareholders of S1. The IRS held that the above
described   merger  qualified  as  a  tax-free   reorganization   under  Section
368(a)(2)(E), even though the two subsidiaries were newly organized corporations
and a related  corporation was acquired in the  transaction.  As noted,  this is
similar to the plan  contemplated  by the parties to the proposed  Merger,  with
Orion acting as P, Orion Newco acting as S1, and Orion Merger  Subsidiary acting
as S2.

Based  on the  above,  so long as the  continuity  of  interest,  continuity  of
business  enterprise,  and  business  purpose  requirements  are  satisfied,  as
discussed under "Nonstatutory  Requirements"  immediately below, the Merger will
qualify as a reorganization  under Section 368(a)(1)(A) of the Code by reason of
368(a)(2)(E).(6)

         B.       Nonstatutory Requirements

- ----------
6
   In addition to satisfying the requirements of Section 368(a)(2)(E), (i) there
   appear to be good arguments that the Merger will constitute a  reorganization
   described in Section  368(a)(1)(B),  and (ii) when  considered in conjunction
   with the Exchange,  in the Merger of Orion stock for Orion Newco stock should
   qualify for nonrecognition treatment under Section 351(a).



Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 14

Sections 1.368-1(b) and 1.368-2(g) of the Regulations provide that the following
additional  requirements  must  be  met  for  a  transaction  to  qualify  as  a
reorganization within the meaning of Section 368:

         (i)      "Continuity of interest" must be present;

         (ii)     "Continuity of business enterprise" must exist; and


         (iii)    The transaction  must be undertaken for reasons  pertaining to
                  the  continuance  of the business of a corporation  which is a
                  party to the transaction.

Continuity  of Interest.  Qualification  of a  transaction  as a  reorganization
requires  that  the  former  shareholders  of the  acquired  corporation  have a
continuing proprietary interest in the acquiring corporation.  Rev. Proc. 77-37,
1977-2 C.B.  568,  provides that the  "continuity  of interest"  requirement  of
Section 1.368-1(b) of the Regulations is satisfied in a transaction described in
Section  368(a)(1)(A) of the Code by reason of Section  368(a)(2)(E) if there is
continuing  interest  through stock ownership in the controlling  corporation on
the part of the former shareholders of the surviving  corporation which is equal
in value, as of the effective date of the reorganization, to at least 50 percent
of the  value  of  all  of  the  formerly  outstanding  stock  of the  surviving
corporation as of that date. Sales, redemptions, and other dispositions of stock
occurring  prior or  subsequent  to the  exchange  which are part of the plan of
reorganization,  will be considered in determining whether there is a 50 percent
continuing  interest  through stock  ownership as of the  effective  date of the
reorganization.  Management has  represented  that the 50 percent  continuity of
interest  test of Rev.  Proc.  77-37  will be met in the  Merger.  Based on this
representation, the Merger will satisfy the continuity of interest requirement.

Continuity  of  Business  Enterprise.  Section  1.368-1(b)  of  the  Regulations
provides  that a  continuity  of business  enterprise  [as  described in Section
1.368-1(d)  of  the  Regulations]  is  requisite  to a  reorganization.  Section
1.368-1(d) of the Regulations  provides that  continuity of business  enterprise
requires  that the  acquiring  corporation  either  (i)  continue  the  acquired
corporation's  historic  business,  or (ii)  use a  significant  portion  of the
acquired corporation's historic assets in a business. Management has represented
that  Orion will  continue  to be engaged  in the same  business  following  the
Merger. Based on this representation,  the Merger will satisfy the continuity of
business enterprise requirement.

Business  Purpose.  Section  1.368-2(g)  of  the  Regulations  provides  that  a
reorganization  must be undertaken for reasons germane to the continuance of the
business  of a  corporation,  a  party  to the  reorganization.  Management  has
represented  that the Merger will  substantially  benefit the  business of Orion
Atlantic  and  Orion  in  various  ways  (see  I.B.  above).   Based  upon  such
representations,  the Merger will satisfy the business  purpose  requirements of
Section 1.368-2(g) of the Regulations.


Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 15


         C.       Additional Statutory and Regulatory Provisions

Section 358(a)(1) of the Code generally provides that in the case of an exchange
to which Section 351 or 354 applies,  the basis of the property  permitted to be
received  without the  recognition  of gain or loss shall be the same as that of
the property exchanged.

Section  1223(1) states that in determining  the period for which a taxpayer has
held  property  received in an exchange,  the period for which the taxpayer held
the property exchanged shall be included if the property has, for the purpose of
determining gain or loss from a sale or exchange,  the same basis in whole or in
part in the  taxpayer's  hands  as the  property  exchanged,  and  the  property
exchanged constitutes a capital asset at the same time of the exchange.

Section  1032(a) of the Code  generally  provides  that no gain or loss shall be
recognized  to a  corporation  on the  receipt  of money or  other  property  in
exchange for stock (including treasury stock) of such corporation. Also, Section
361(a)  provides that no gain or loss will be recognized to a corporation  if it
is a party to a reorganization and exchanges property, in pursuance of such plan
of reorganization, solely for stock or securities in another corporation a party
to the reorganization.(7)

IV.      FEDERAL INCOME TAX CONSEQUENCES

Based solely upon the  Documents  and the  information  and  representations  of
Management contained herein, it is our opinion that the following Federal income
tax consequences will result:

1.  Except  as  otherwise  stated  in the Proxy  Statement  under  the  heading,
    "Certain  Federal  Income  Tax  Consequences,"  no  gain  or  loss  will  be
    recognized by Orion stockholders  solely as a consequence of the exchange of
    their Orion stock for  substantially  identical  shares of Orion Newco stock
    pursuant to the Merger.

2.  The basis of the Orion Newco stock to be received by the Orion  shareholders
    will be the same as the basis of the Orion  stock  surrendered  in  exchange
    therefor.

3.  The  holding  period of the Orion  Newco  stock to be  received by the Orion
    shareholders  will include the period during which the Orion common stock or
    Orion preferred stock, as the case may be, surrendered in exchange therefore
    was held, provided that the Orion common stock and the Orion preferred stock
    was held as a capital asset on the date of the exchange.

- ----------
7
  See also Section 1.1032-2(b) of the Regulations.



Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 16


V.    SCOPE OF OPINION


The scope of this opinion is expressly  limited to the three Federal  income tax
consequences   set  forth  in  IV.   above.   The  opinion  is  based  upon  the
representations made by Management contained herein and in the Documents.
These representations have not been independently verified by us.

Specifically,   our  opinion  has  not  been  requested  and  we  have  made  no
determination  or  expressed  any  opinion  with  respect  to any other  issues,
including,  but not  limited  to: (1) the fair  market  value of any stock being
exchanged  pursuant to the Merger  Agreement  and  Exchange  Agreement;  (2) any
limitations,  including  those which may be imposed  under  Section  382, on the
availability  of net operating  loss  carryovers (or built-in  losses),  if any,
after the  Transactions;  (3) any state or local  consequences to the parties to
the Merger;  or (4) the potential  application  of Section 306 or Section 305(c)
and the regulations thereunder to Orion shareholders who receive preferred stock
in the Merger.  Furthermore,  we have not  reviewed the Orion stock option plans
that, pursuant to the Merger Agreement,  will become stock option plans of Orion
Newco, and express no opinion with respect to the  consequences to Orion,  Orion
Newco, or the holders of such options as a result of such conversion.

Our opinion,  as stated  above,  is based upon the analysis of the current Code,
the  Regulations  thereunder,  current  case law,  and  published  rulings.  The
foregoing   authorities  are  subject  to  change,   and  such  changes  may  be
retroactively  effective.  If so, our views set forth above may be affected  and
may not be relied upon.  Further,  any variation or  differences in the facts or
representation  recited herein,  for any reason,  might affect our  conclusions,
perhaps in an adverse manner, and make them inapplicable.  In addition,  we have
not been  engaged to and will not update our opinion for changes in facts or law
occurring subsequent to the date hereof.

This opinion is being rendered  solely to the Orion  Shareholders  and is solely
for their  benefit.  This  opinion may not be relied upon by any other person or
persons,  or be used for any  other  purposes,  including,  but not  necessarily
limited  to,  filings  with  Governmental  agencies  without  our prior  written
consent.  However,  we  understand  that this  opinion  will be  included  as an
appendix to the Proxy  Statement  to be filed with the  Securities  and Exchange
Commission. We consent to the inclusion of our opinion with such filing.

This letter  represents our views as to the  interpretation of existing law and,
accordingly,  no  assurance  can be given that the IRS or the courts  will agree
with the above analysis.


                                                              Very truly yours,



Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 17

                                                             
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