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                                                                   EXHIBIT 10.25

                      KASTAR SATELLITE COMMUNICATIONS CORP.

                   AMENDED AND RESTATED STOCK OPTION AGREEMENT

         THIS AMENDED AND RESTATED STOCK OPTION AGREEMENT (the "Agreement") is
entered into as of May 26, 1999, between KASTAR SATELLITE COMMUNICATIONS CORP.,
a Delaware corporation (the "Company") and PAUL FROELICH (the "Option Holder").
Certain capitalized terms used in this Agreement will have the meanings
specified in Section 14.

         A. WHEREAS, the Option Holder entered into that certain Stock Option
Agreement dated April 1, 1999 (the "Original Option Agreement") with KaStar
Satellite Communications Corp., a Colorado corporation ("KaStar Colorado"); and

         B. WHEREAS, pursuant to the Original Option Agreement, KaStar Colorado
granted to the Option Holder options (the "Original Options"), on the date and
the Option Price indicated (the "Original Option Price"), to acquire the
following number of shares of KaStar Colorado's no par value common stock
("KaStar Common Stock"):

<TABLE>
<CAPTION>
Date of                                   # of         Option Price                           Cumulative
 Grant              Source               Options        Per Share      Valuation Source        Options
-------       -------------------        -------       ------------    ----------------       ----------

<S>           <C>                        <C>           <C>             <C>                    <C>
5/1/99        Employment                 7.7559         $42,000.00      TRW Transaction         7.7559
5/12/99       Grant to Tom Elliot         .0268         $47,750.00      KP Transaction          7.7827
</TABLE>

         C. WHEREAS, effective as of May 20, 1999, KaStar Colorado merged with
and into the Company the "Merger") for the principal purposes of effecting a
reincorporation of KaStar as a Delaware corporation and, at the same time,
restructuring KaStar's capital structure; and;

         D. WHEREAS, pursuant to the terms of the Original Option Agreement,
upon consummation of the Merger, all Options would have vested;

         E. WHEREAS, the Board wishes to clarify its intention in the first
sentence of Section 4(b) of the Original Option Agreement concerning the effect
on Option Holders and their Options of (1) the declaration by the Board and
payment by the Company of cash dividends and other cash distributions with
respect to the Company's Stock after the Effective Date and on or before the
date of exercise of an Option ("Paid Cash Dividends") and (2) declared but
unpaid dividends and the relative liquidation preferences of the holders of
Stock issued and outstanding on the record date of such dividend, and the
holders of Option Shares ("Unpaid Dividends"); and

         F. WHEREAS, pursuant to the terms of the Plan of Merger between the
Company and

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KaStar Colorado (the "Merger Agreement"), various rights to acquire KaStar
Colorado securities under the Original Option Agreement are converted as
specified in this Agreement; and

         G. WHEREAS, in a transaction dated as of the date hereof (the
"Transaction"), the Company is issuing 6,671,250 Series A Shares; and

         H. WHEREAS, as a result of the consummation of the Transaction,
pursuant to the terms of the Original Option Agreement, the Option Holder is
receiving an option grant (a "New Option Grant" entitling him to acquire "New
Option Shares" both as defined below) on the terms set forth herein; and

         I. WHEREAS, the Original Option Shares and the New Option Shares are
collectively referred to herein as the "Initial Option Shares" and

         J. WHEREAS, each Initial Option Grant and each Subsequent Option Grant
(as defined herein) is referred to herein as an "Option"; and

         K. WHEREAS, shares of the Company's equity securities, of any class or
series, are referred to herein as "Stock"; and

         L. WHEREAS, shares of Stock subject to Options are referred to herein
as "Option Shares"; and

         M. WHEREAS, the original effective date of this Agreement is April
1,1999 (the "Effective Date").

                  NOW THEREFORE, for and in consideration of the mutual promises
and covenants herein contained, it is mutually covenanted and agreed by the
parties hereto as follows:

1. CONVERTED OPTION GRANTS; NEW OPTION GRANT; OPTION PRICE OF THE NEW OPTION
GRANT

   a. Converted Option Grants. In connection with the consummation of the
transactions under the Merger Agreement, (i) each share of KaStar Colorado's
Common Stock became, by operation of law, the right to receive 47,750 shares of
the Company's Series A Preferred Stock, $.001 par value per share ("Series A
Stock"), (ii) the Company assumed all of KaStar Colorado's obligations under the
Original Option Agreement, and (iii) each Original Option to acquire shares of
KaStar Colorado Common Stock under the Original Option Agreement became an
option to acquire 47,750 shares of Series A Stock, and the Original Option Price
for each Original Option was adjusted by dividing the Original Option Price in
effect immediately before

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the Merger by 47,750, such that the Option Holder now holds options (the
"Converted Options" or "Converted Option Grants") to acquire Series A Stock (the
"Converted Option Shares) as follows:

<TABLE>
<CAPTION>
Date of                               # of      Option Price                        Cumulative
 Grant            Source             Options     Per Share      Valuation Source      Options
-------     -------------------      -------    ------------    ----------------    ----------
<S>         <C>                      <C>        <C>             <C>                 <C>
5/1/99      Employment               370,346       $ .88        TRW Transaction     370,346
5/12/99     Grant to Tom Elliot        1,281       $1.00        KP Transaction      371,627
</TABLE>

   b. Subject to the terms and conditions of this Agreement, effective as of the
date hereof, the Company hereby grants to Option Holder an option (the "New
Option Grant") to purchase 24,760 Series A Shares (the "New Option Shares"). The
Option Price for the New Option Grant shall be $1.00 per Series A Share.

2. REQUIREMENTS FOR EXERCISE; VESTING.

   a. Except as otherwise specified herein, all Options shall be exercisable as
follows: (i) 25% on the date of this Agreement; and (ii) the remaining 75% as
follows:

<TABLE>
<CAPTION>
                                            Percentage of Option That Shall
     Vesting  Date                          Become Exercisable on Such Date
     -------------                          -------------------------------

     <S>                                    <C>
      May 1, 2000                                         25%
      May 1, 2001                                         25%
      May 1, 2002                                         25%
</TABLE>

   b. Except as otherwise specified in this Agreement, an Option shall not be
exercisable as to any shares of Stock as to which the vesting requirement has
not been satisfied. Any Option that is granted after a vesting date shall be
deemed to be vested on the grant date of such Option as to that percentage of
such Option (without regard to its actual grant date) that would have vested if
such Option had actually been granted on the Effective Date. The number of
shares of Stock as to which an Option may be exercised shall be cumulative, so
that once the Option shall have vested and become exercisable as to any shares
of Stock, it shall continue to be exercisable as to such shares until expiration
or termination of the Option as provided in Section 7 of this Agreement.

3. METHOD FOR EXERCISING THE OPTION.

   a. An Option may be exercised only by delivery of written notice of exercise,
together with payment of the Option Price as provided below, in person or
through certified or registered mail, fax or overnight delivery to Company at
the following address: 9137 East Mineral Circle, Suite 140, Englewood, Colorado
80112, Attn: David M. Brown, or such other address as shall be furnished in
writing to Option Holder by Company. Such written notice shall specify that the
Option is being exercised, and the number of shares of Stock with respect to
which the Option is

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exercised, accompanied by payment of the Option Price. If the shares of Stock
covered by this Option are not issued in a registered transaction, the issuance
of the shares will be subject to the receipt by Company of appropriate
investment representations from Option Holder and the certificate representing
such shares of Stock shall bear such standard legends as may be required by
Company in order to assure compliance with federal and state securities laws,
and such other restrictions on transfer or registration of transfer as may be
imposed in accordance with applicable law.

   b. The purchase of such Stock shall take place at the address of Company set
forth above upon delivery of the notice of exercise, at which time the Option
Price for the Stock shall be paid in full, at the option of Option Holder, by
(i) certified or cashier's check payable to Company's order, or by wire transfer
to such account as may be specified by Company for this purpose, or (ii)
delivery to Company of certificates representing the number of shares of Stock
then owned by Option Holder, the Fair Market Value of which equals the Option
Price of the Stock to be purchased pursuant to the Option, properly endorsed for
transfer to Company; provided, however, that no Option may be exercised by
delivery to Company of certificates representing Stock, unless such Stock has
been held by Option Holder for more than six months or (iii) a reduction in the
number of shares of Stock issuable upon exercise of the Option by that number of
shares having an aggregate Fair Market Value in excess of the applicable Option
Price therefor equal to the aggregate Option Price of the Stock to be purchased
pursuant to the Option. For purposes of this Option, the Fair Market Value of
any shares of Stock delivered in payment of the Option Price upon exercise of
the Option shall be the Fair Market Value as of the exercise date; the exercise
date shall be the day of delivery of the certificates for the Stock used as
payment of the Option Price.

   c. Upon such notice to Company and payment of the Option Price, the exercise
of the Option shall be deemed to be effective, and a properly executed
certificate or certificates representing the Stock so purchased shall be issued
by Company and delivered to Option Holder.

   d. In lieu of issuing any fractional shares upon any exercise of the Option,
Company will pay Option Holder in cash an amount equal to the difference between
the Option Price and Fair Market Value of such fractional share (so if the
Option Price and Fair Market Value were $100 and $1,000, respectively, for a
full share, they would be $75 and $750 for a 3/4 fractional share, and Company
would pay $675 upon such exercise).

4. ADJUSTMENT OF AN OPTION.

   a. If at any time Company increases or decreases the number of its
outstanding shares of Stock, of any class or series, or changes in any way the
rights and privileges of such shares, by means of the payment of a stock
dividend or the making of any other distribution on such shares payable in
Stock, or through a Stock split or subdivision of shares, or a consolidation or
combination of shares, or through a reclassification or recapitalization
involving the Stock, the numbers, rights and privileges of the shares of Stock
included in the Option shall be increased, decreased or changed in like manner
as if such shares had been issued and outstanding, fully paid and non-assessable
at the time

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of such occurrence. In addition, the Option Price per share will be adjusted as
necessary so that the aggregate Option Price that would be payable upon full
exercise of the Option would not be affected by such occurrence (for example, if
the number of shares of Stock included in the Option were doubled as a result of
a two for one stock split, the Option Price per share would be halved).

   b. If Company shall at any time (i) distribute with respect to its Stock
securities of persons other than Company or other assets (including Paid Cash
Dividends on such Stock, but excluding distributions referred to in subsection
(a)) or (ii) declare any Unpaid Dividend that is not addressed in clause (i) or
grant to the holders of its Stock rights to subscribe pro rata for additional
shares thereof or for any other securities of the Company or there shall be any
other change (except as described in subsection (a)) in the number or kind of
outstanding shares of Stock or of any stock or other securities into which the
Stock shall be changed or for which it shall have been exchanged, then in any
such event, Option Holder will, without additional cost, be entitled to receive
upon any exercise of the Option, in addition to the shares of Stock as to which
the Option is so exercised, the number of securities or other assets (including
Paid Cash Dividends and/or all rights with respect to Unpaid Dividends (as the
case may be) on such Stock, including, but not limited to, an increase in the
liquidation preference with respect to such Stock in accordance with the terms
of the Company's Certificate of Incorporation, if any) or rights that Option
Holder would have been entitled to receive as if such shares of Stock had been
issued and outstanding, fully paid and non-assessable at the time of such
occurrence. However, it is intended that this Section 4(b) shall not duplicate
the effect of Section 5 with respect to the issuance of additional shares of
Stock to any Person.

   c. Notwithstanding anything to the contrary contained herein, if at any time
the Company enters into any of the transactions described herein or any other
equity restructuring transaction, changes shall be made to the Options in order
to restore Option Holder's economic position prior to such restructuring in
accordance with all of the following criteria:

      i. the aggregate intrinsic value (difference between Fair Market Value and
Option Price per share) of the Options immediately after the change may not be
greater or less than the aggregate intrinsic value of the Options immediately
before the change; and

      ii. the vesting provisions and Option Period of the original grant will
remain the same.

5. GRANT OF ADDITIONAL OPTION. If, during the period beginning upon the
Effective Date and ending upon the earlier of the closing of an initial public
offering ("IPO") of the Company's Stock, and five years from the Effective Date
(the "Initial Period"), the Company issues additional shares of its equity
securities or Stock Rights in any transaction (including without limitation, the
IPO and any option to acquire Stock granted to employees of the Company) that
does not result in an adjustment to the Option pursuant to the provisions of
Section 4 (a "Dilutive Event"), and, as of the date of such Dilutive Event the
number of shares of Stock covered by this Option shall be less than 0.5% of the
outstanding equity securities of Company on a fully diluted basis immediately
following such occurrence, then the following will apply:

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   a. The Company shall grant to the Option Holder an option (each such grant, a
"Subsequent Option Grant") to acquire additional shares of Stock such that the
number of shares of Stock as to which the Option (including all Subsequent
Option Grants and all previously exercised Options) will be exercisable
represents, after giving effect to the applicable occurrence, .5% of the
outstanding shares of each class of Company's equity securities on a fully
diluted basis. On the date of the Dilutive Event, the Company and the Option
Holder shall enter into an Option Grant Agreement in the form of Exhibit A
hereto evidencing the Subsequent Option Grant. The Company's failure to execute
and deliver an Option Grant Agreement shall not affect the Option Holder's right
to exercise an Option, including, but not limited to, Options granted pursuant
to a Subsequent Option Grant.

   b. Subsequent Option Grants and the shares issuable upon exercise thereof,
shall be considered to have vested, or will vest, for purposes of Section 2, on
the same dates and in the same percentages as the Initial Option Shares vest.

   c. The price per share for Subsequent Option Grants will be equal to (i) with
respect to each such share relating to a Stock Right, the per share purchase
price applicable upon exercise of the corresponding Stock Right, and (ii) with
respect to each share relating to issuance of equity securities by Company other
than pursuant to a Stock Right, the price per share of such Stock received by
Company in the transaction giving rise to the applicable shares (including cash
and noncash consideration), provided that if the Board and the Option Holder are
unable to agree on the value of any noncash consideration included in such
price, each in their reasonable discretion, the value of the noncash
consideration will be the Appraised Noncash Consideration Value. Upon any
exercise, Option Holder will designate the Option Shares (i.e., the date of the
Option grant and the associated Option Price) as to which he is exercising the
Option.

   d. Except as specified in subparagraphs (a), (b) and (c) above, the Option
Shares received by the Option Holder pursuant to a Subsequent Option Grant will,
in all respects, be treated in the same manner under this Agreement as the
Initial Option Shares, including without limitation, under Section 4.

   e. In any case where Option Holder's Option is treated as fully vested under
this Agreement prior to the end of the Initial Period, he may exercise his
Option as to all or any portion of the shares covered, plus any additional
shares that would be subject to the Option if such event that is the cause for
such vesting is deemed to be the end of the Initial Period under this Section 5.

   f. For purposes of this Agreement, "fully diluted" will treat as issued and
outstanding all into which outstanding securities of any class (including, but
not limited to, convertible debt) may be exchanged or converted at the option of
Company or holder or which any Person has an option or other right to acquire.
Any such security or instrument that causes Stock which is not issued and
outstanding to be treated as issued and outstanding for purposes of "fully
diluted" calculations under this Agreement are referred to as "Stock Rights."

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6. REORGANIZATION; CHANGE OF CONTROL.

   a. Not less than 30 days prior to consummation of any Fundamental Change, the
Company will give Option Holder written notice of such Fundamental Change. Such
notice shall be deemed to have been given when delivered personally to Option
Holder or when mailed to Option Holder by registered or certified mail, postage
prepaid, or by Federal Express or similar established courier service, at Option
Holder's address last known to the Company. If, in connection with such
Fundamental Change, the Company does not take the action specified in Section
6(b) and if Option Holder does not exercise his option within the time specified
in Section 6(c), then the Option shall automatically terminate and be of no
further force and effect whatsoever, without the necessity for any additional
notice or other action by the Company. "Fundamental Change" means (i) the merger
or consolidation of Company with or into another corporation (other than (a) a
consolidation or merger in which the Company is the continuing corporation and
which does not result in any reclassification or change of outstanding shares of
Stock, or (b) if the Company is not the continuing corporation, a merger or
consolidation (or a series of mergers or consolidations) which result in less
than 50% of the surviving company's equity securities or voting power owned by
Persons that were stockholders of the Company prior to the first such
transaction(s)); or (ii) the sale or conveyance of the property of Company as an
entirety or substantially as an entirety (other than a sale or conveyance in
which Company continues as a holding company of an entity or entities that
conduct the business or businesses formerly conducted by Company); (iii) the
dissolution or liquidation of Company; or (iv) any "person" or "group" (as such
terms are used in Sections 13(d) and 14(d) of the Securities and Exchange Act of
1934, as amended (the "Exchange Act"), or any successor provisions to either of
the foregoing), including any group acting for the purpose of acquiring,
holding, voting or disposing of securities within the meaning of Rule
13d-5(b)(1) under the Exchange Act, is (including as a result of consolidation
or merger, sale, transfer, lease, conveyance or other disposition of assets, or
otherwise) or becomes the "beneficial owner" (as defined in Rule 13d-3 under the
Exchange Act), directly or indirectly, of more than 50% (or, after the closing
of the IPO, 35%) of the total voting power of the Stock (for purposes of this
clause (iv), such person or group shall be deemed to beneficially own any
securities of any nature of an entity (the "specified entity") held by any other
entity (the "parent entity") so long as such person or group beneficially owns,
directly or indirectly, in the aggregate a majority of the total equity
interests of such parent entity). Notwithstanding the foregoing, the sale or
conveyance of the assets of a division of Company that does not constitute a
sale of substantially all of Company's assets shall not constitute a Fundamental
Change.

   b. In the case of a Fundamental Change described in clauses (i) or (ii) of
Section 6(a), the Company, or the successor or purchaser may, as the case may
be, at their election, make adequate provision for the assumption of the Option
or the substitution of new options for the Option on terms comparable to the
Option except that Option Holder shall have the right thereafter to purchase the
kind and amount of shares of stock or other securities or property or cash
receivable upon such merger,

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consolidation, sale or conveyance by a holder of the number of shares of Stock
that would have been receivable upon exercise of the Option immediately prior to
such merger, consolidation, sale or conveyance (assuming such holder of Stock
was fully vested and failed to exercise any rights of election and received per
share the kind and amount received per share by a majority of the non-electing
shares). The provisions of this Section 6 shall similarly apply to successive
mergers, consolidations, sales or conveyances. The Company, or the successor or
purchaser, as the case may be, shall give the Option Holder written notice of
its election to, or not to, assume the Option as contemplated by this Section
6(b) not less than 15 days prior to the Fundamental Change. Failure to give such
notice timely shall obligate the Company, or the successor or purchaser, as the
case may be, to assume the Option and make such provisions as are required by
this Section 6(b).

   c. If Option Holder is notified, in accordance with Sections 6(a) and 6(b) of
a Fundamental Change and that the Company, or the successor or purchaser, as the
case may be is not going to assume the Option, he may exercise his Option at any
time before the later of (i) 30 days after Option Holder's receipt of such
notice or (ii) the occurrence of the Fundamental Change (but subject to
occurrence of such event), regardless of whether all conditions of exercise
relating to length of service have been satisfied. However, if the Stock is not
publicly traded at the time of any such Fundamental Change, Company shall have
the right to cancel the Option through payments to Option Holder of an amount
equal to the difference between the Option Price for such shares covered by the
Option and the Fair Market Value of such shares as of the last day of the month
prior to the date of such transaction. Company shall make its election to cancel
the Option in accordance with this provision at any time prior to the occurrence
of the transaction through written notice to Option Holder and payment to Option
Holder by wire transfer of immediately available funds to such account(s)
designated by Option Holder of the amount so determined within 20 days following
the date of delivery of written notice to Option Holder of Company's exercise of
its right hereunder.

7. EXPIRATION AND TERMINATION OF THE OPTION. The Option shall expire ten years
from the Effective Date (the period from the Effective Date to the expiration
date is the "Option Period") or prior to such time as follows:

   a. If the employment of Option Holder by Company is terminated for "Cause"
within the Option Period, (i) the Company's obligation to make Subsequent Option
Grants shall terminate immediately upon the termination of employment of Option
Holder, and (ii) the Option may be exercised by Option Holder (only with respect
to that portion of the Option which has vested as of such date in accordance
with the terms of this Agreement) at any time within three months following the
date of such termination (provided that such exercise must occur within the
Option Period), but not thereafter (except as provided in subparagraph (c)
below). "Cause" shall be defined as a termination of your employment due to (a)
fraud, embezzlement or any other crime involving moral turpitude, (b) gross or
willful neglect of duty, (c) material breach of any material Company written
employee policy or procedure, including but not limited to the Company's code of
business conduct, (d) unauthorized disclosure or use of any material
confidential information or trade secrets of the Company, (e) material breach of
any material document or instrument you sign or furnish to the Company,
including without limitation any stock option or employment agreement, (f)
breach of fiduciary obligation to the Company, (g) willful and repeated failure
to comply with the lawful

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directives of the Company's President, Chief Executive Officer or Board of
Directors, (h) failure to adequately perform your responsibilities in connection
with your employment by the Company, as determined by the Company's President,
and (i) insubordination.

   b. If the employment of Option Holder by Company is terminated voluntarily by
Option Holder within the Option Period, (i) the Company's obligation to make
Subsequent Grants shall terminate immediately upon the termination of employment
of Option Holder, and (ii) the Option may be exercised by Option Holder (only
with respect to that portion of the Option which has vested as of such date in
accordance with the terms of this Agreement) at any time within three months
following the date of such termination (provided that such exercise must occur
within the Option Period), but not thereafter (except as provided in
subparagraph (c) below).

   c. If the employment of Option Holder by Company is terminated by Company
within the Option Period for any reason other than Cause, "Disability" or death,
the Option shall become 100% vested and exercisable and may be exercised by
Option Holder at any time following the date of such termination (provided that
such exercise must occur within the Option Period), and the Company's obligation
to make Subsequent Grants hereunder shall be unaffected by the termination of
the Option Holder's employment. If Option Holder terminates employment with
Company because Company requests Option Holder to relocate from the greater
Denver, Colorado metropolitan area and Option Holder declines to so relocate, or
because Option Holder is required to accept a reduction in base salary or
benefits, then in any such case Option Holder's termination of employment shall
be considered to be termination by Company for reasons other than Cause,
Disability or death and the Option shall become 100% vested and exercisable in
accordance with the preceding sentence.

   d. If Option Holder dies within the Option Period, while employed by Company,
the Option may be exercised by those entitled to do so under his will or by the
laws of descent and distribution within one year following his death (provided
that such exercise must occur within the Option Period), but not thereafter. In
any such case, the Option may be exercised only as to the shares of Stock as to
which the Option had become exercisable on or before the date of Option Holder's
death.

   e. If Option Holder becomes Disabled with the Option Period, while employed
by Company, the Option may be exercised within one year following his
termination of employment (provided that such exercise must occur within the
Option Period), but not thereafter. In any such case the Option may be exercised
only as to the shares of Stock as to which the Option had become exercisable on
or before the date of Option Holder's Disability, and the Company's obligation
to make Subsequent Grants shall terminate on the date on which the Option Holder
becomes disabled. For purposes of this Agreement, Option Holder shall be
considered to be "Disabled" if he is disabled in accordance with the provisions
of section 22(e)(3) of the Internal Revenue Code of 1986, as amended (the
"Code").

8. COMPANY RIGHT TO REACQUIRE STOCK AND TERMINATE OPTION. If the employment of
Option

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Holder with Company terminates prior to an IPO due to a termination for Cause or
a termination by Option Holder (but not any termination by Option Holder
described in Section 7(c), (d) or (e), as to which this Section 8 will not be
applicable), Company shall have the right to purchase from Option Holder all
shares of Stock previously acquired pursuant to the exercise of the Option, and
to cancel all of the portion of the Option with respect to any shares of Stock
that may be acquired by Option Holder under the terms of the Option at the date
of his termination of employment. Company shall exercise its right to purchase
such shares of Stock, and cancel the Option, through a written notice delivered
to Option Holder within 30 days following such termination of Option Holder's
employment. The purchase price for such Stock will be equal to the Fair Market
Value as of the end of the month immediately preceding the date of termination
of employment of Option Holder. The purchase price for cancellation of the
exercisable portion of the Option will be an amount equal to the difference
between the aggregate Fair Market Value and the Option Price for such shares,
determined as of the date specified in the immediately preceding sentence.
Payment for any shares of Stock acquired by Company or any portion of the Option
canceled by Company in accordance with this Section 8 shall be made within 20
days following the delivery of written notice to Option Holder of Company's
exercise of its right to acquire such shares of Stock and cancel such portion of
the Option by wire transfer of immediately available funds to such account(s) as
may be designated by Option Holder in writing and the closing of the transaction
shall occur at the offices of Company.

9. TRANSFERABILITY OF OPTION AND STOCK.

   a. The Option may not be transferred except by will or pursuant to the laws
of descent and distribution, and it shall be exercisable during Option Holder's
life only by him, or in the event of Disability or incapacity, by his guardian
or legal representative, and after his death, only by those entitled to do so
under his will or the applicable laws of descent and distribution. Except as
specifically provided herein, upon any attempt to transfer, assign, pledge,
hypothecate or otherwise dispose of the Option or any right or privilege granted
hereunder, or upon the levy of any attachment or similar process upon the rights
and privileges herein conferred, the Option and the rights and privileges
hereunder shall become immediately null and void.

   b. Shares of Stock acquired pursuant to this Option may not be transferred by
Option Holder without the prior written consent of Company until the date of an
IPO, at which time this restriction shall lapse, and certificates representing
such shares will be legended accordingly.

10. CONFIDENTIAL INFORMATION.

   a. Option Holder acknowledges that the trade secrets, know how and
proprietary processes of Company and its confidential business plans,
strategies, concepts, prospects and financial data (collectively "Confidential
Information") are valuable, unique assets of Company. Option Holder shall not,
during or after the term of this Agreement, disclose any of the Confidential
Information (unless already generally known to and available for use by the
public other than as a result of Option

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Holder's acts in violation of this Section or as required by law) to any person
or entity for any purpose, nor shall Option Holder use any Confidential
Information except, in either case, as is required in Option Holder's reasonable
judgment for Option Holder to perform his duties as an employee of Company.

   b. Option Holder will, upon termination of his employment with Company,
deliver to Company all records, forms, contracts, studies, reports, appraisals,
financial data, lists of names or other customer or supplier data, and any other
articles or papers, computer tapes and materials that have come into his
possession by reason of his employment with Company, whether or not prepared by
him, and he shall not retain memoranda or copies of any of those items.

11. WITHHOLDING. As a condition to the issuance of any Stock hereunder, Option
Holder shall make appropriate arrangements with Company to provide for the
amount of any withholding required by Sections 3102 and 3402 of the Code and
applicable state income tax laws.

12. LIMITATION OF RIGHTS. Option Holder or his successor shall have no rights as
a stockholder with respect to the shares of Stock covered by this Option until
Option Holder or his successors become the holder of record of such shares.

13. STOCK RESERVE. Company shall at all times during the term of this Agreement
reserve and keep available such number of shares of Stock as will be sufficient
to satisfy the requirements of this Agreement, and Company shall pay all
original issue taxes (if any) on the exercise of the Option, and all other fees
and expenses necessarily incurred by Company in connection therewith.

14. DEFINED TERMS.

   a. The following capitalized terms will have the meanings set forth below for
purposes of this Agreement:

      i. "Appraised Fair Market Stock Value" means the value of Stock determined
as follows:

         A. Company and Option Holder will attempt to agree on the Stock Value
within 10 days after initiation by either. If they are unable to agree, they
will attempt to select a single appraiser to make such determination.

         B. If Company and Option Holder cannot agree on a single appraiser
within five days after the end of such initial 10-day period, then within an
additional ten-day period, Company will select one qualified independent
appraiser, and Option Holder will select one qualified independent appraiser,
and each of the two selected appraisers will determine the Stock value. If
either fails to select an appraiser within the applicable time period, then the
appraiser selected by the other will be the sole appraiser. If only one
appraiser is used, the Stock value will be as determined in such appraisal.

                                       11
<PAGE>   12

         C. If two appraisals are used, and if the applicable Stock value
determined by the higher of the two appraisals is not greater than 110% of the
Stock value determined by the lower of the two appraisals, the Stock value will
be equal to the average of the two appraisals; however, if the two appraisals do
not fall within this range, the two appraisers selected by the parties will
select a third qualified independent appraiser to determine the applicable Stock
value.

         D. If a third appraisal is necessary, then the Stock value will be
equal to the average of the two of the three appraisals that are closest to one
another (or if the highest and lowest appraisal are equidistant from the middle,
then such Stock value will be equal to the middle appraisal).

         E. In determining the Appraised Fair Market Stock Value, each party
will pay the costs of its appraiser and the parties will split the costs of a
single appraiser or a third appraiser, if applicable.

      ii. "Appraised Noncash Consideration Value" means the value of noncash
consideration determined as follows:

         A. Company and Option Holder will attempt to agree on the value of
noncash consideration within 10 days after initiation by either. If they are
unable to agree, they will attempt to select a single appraiser to make such
determination.

         B. If Company and Option Holder cannot agree on a single appraiser
within five days after the end of such initial 10-day period, then within an
additional ten-day period, Company will select one qualified independent
appraiser, and Option Holder will select one qualified independent appraiser,
and each of the two selected appraisers will determine the value of noncash
consideration. If either fails to select an appraiser within the applicable time
period, then the appraiser selected by the other will be the sole appraiser. If
only one appraiser is used, the value of noncash consideration will be as
determined in such appraisal.

         C. If two appraisals are used, and if the applicable value of noncash
consideration determined by the higher of the two appraisals is not greater than
110% of the value of noncash consideration determined by the lower of the two
appraisals, the value of noncash consideration will be equal to the average of
the two appraisals; however, if the two appraisals do not fall within this
range, the two appraisers selected by the parties will select a third qualified
independent appraiser to determine the applicable value of noncash
consideration.

         D. If a third appraisal is necessary, then the value of noncash
consideration will be equal to the average of the two of the three appraisals
that are closest to one another (or if the highest and lowest appraisal are
equidistant from the middle, then such value of noncash consideration will be
equal to the middle appraisal).

         E. Company will pay all appraisal costs in connection with determining
the Appraised Noncash Consideration Value.

                                       12
<PAGE>   13

      iii. "Average Trading Price" of any stock will mean the average of the
reported closing market prices of such stock for the 10 consecutive trading days
(or, if a market for such stock first comes into being during such 10-trading
day period, those trading days during such period for which reported market
prices for such stock are available) ending on the third trading day prior to
the date of exercise of the Option. The closing market price for each day in
question will be the last sale price, regular way or, if no such sale takes
place on such day, the average of the closing bid and asked prices, regular way,
in either case as reported in the principal consolidated transaction reporting
system of the principal national securities exchange on which such stock is
listed or admitted to trading or, if such stock is not listed or admitted to
trading on any national securities exchange, the last quoted sale price or, if
no such sale price is quoted, the average of the high bid and low asked prices
in the over-the-counter market, as reported by the Nasdaq National Market System
("Nasdaq") or such other system then in use or, if on any such trading day such
capital stock is not quoted by any such organization, the average of the closing
bid and asked prices as furnished by the professional market maker who has been
most active in making a market in such capital stock during the preceding 12
months. The Average Trading Price of such stock will be appropriately and
equitably adjusted to reflect the effects of any stock dividend, stock split,
reclassification, recapitalization, combination or distribution of assets,
securities or other property (other than ordinary course cash dividends) to
holders of such stock by the issuer thereof affecting such stock, the record
date, ex-dividend date or similar date of which occurs during the period in
which the Average Trading Price is to be determined or thereafter prior to the
date of the consummation of the purchase or transaction for which Fair Market
Value is being determined.

      iv. "Board" means the Board of Directors of Company.

      v. "Fair Market Value" means after an IPO with respect to the class of the
Stock in question, the Average Trading Price of such Stock or, prior to such
IPO, the Appraised Fair Market Stock Value.

      vi. "Option Price" means, as to any shares of Stock, the price per share
at which the Option Holder has the right to acquire such shares, as determined
in accordance with the terms of this Agreement.

      vii. "Person" means any individual, corporation, partnership, limited
liability company, trust or other entity.

                                       13
<PAGE>   14

      viii. In addition, the definitions for the following terms are in the
Sections indicated below:

<TABLE>
<CAPTION>
            Term                                        Section
            ----                                        -------
<S>                                                     <C>
            Agreement                                   Introduction
            Cause                                       7(a)
            Code                                        7(e)
            Company                                     Introduction
            Confidential Information                    10(a)
            Converted Option Grants                     1(a)
            Converted Option Shares                     1(a)
            Converted Options                           1(a)
            Dilutive Event                              5
            Disabled                                    7(e)
            Effective Date                              Recital M
            Fundamental Change                          6(a)
            Initial Option Shares                       Recital I
            Initial Period                              5
            IPO                                         5
            KaStar Colorado                             Recital A
            KA Star Common Stock                        Recital B
            Merger                                      Recital C
            Merger Agreement                            Recital F
            New Option Grant                            Section 1(b)
            New Option Shares                           Section 1(b)
            Option                                      Recital J
            Option Holder                               Introduction
            Option Period                               7
            Option Shares                               Recital L
            Original Option Agreement                   Recital A
            Original Option Price                       Recital B
            Original Options                            Recital B
            Paid Cash Dividend                          Recital E
            Series A Stock                              Section 1(a)
            Stock                                       Recital K
            Stock Right                                 5(f)
            Subsequent Option Grant                     5(a)
            Transaction                                 Recital G
            Unpaid Dividends                            Recital E
</TABLE>

15. MISCELLANEOUS.

   a. NOTICES. Any notice required or permitted to be given under this Agreement
shall be in writing and shall be given by first class registered or certified
mail, postage prepaid, or by personal delivery to the appropriate party,
addressed:

      i. If to Company, to David M. Brown, General Counsel, KaStar Satellite
Communications Corp., 9137 East Mineral Circle, Suite 140, Englewood, Colorado
80112, or at

                                       14
<PAGE>   15

such other address as may have been furnished to Option Holder in writing by
Company; or

   ii. If to Option Holder, to 9137 East Mineral Circle, Suite 140, Englewood,
Colorado 80112 or at such other address as may have been furnished to the
Company in writing by Option Holder.

Any such notice shall be deemed to have been given as of the second day after
deposit in the United States mails, postage prepaid, properly addressed as set
forth above, in the case of mailed notice, or as of the date delivered in the
case of personal delivery.

   b. AMENDMENT. Except as provided herein, this Agreement may not be amended or
otherwise modified unless evidenced in writing and signed by Company and Option
Holder.

   c. COMPLIANCE WITH SECURITIES LAWS. This Agreement shall be subject to the
requirement that if at any time counsel to Company shall determine that the
listing, registration or qualification of the shares of Stock subject to the
Option upon any securities exchange or under any state or federal law, or the
consent or approval of any governmental or regulatory body, is necessary as a
condition of, or in connection with, the issuance or purchase of such shares
thereunder, the Option may not be exercised in whole or in part unless such
listing, registration, qualification, consent or approval shall have been
effected or obtained on conditions acceptable to the Board. Nothing herein shall
be deemed to require Company to apply for or obtain such listing, registration
or qualification. Notwithstanding anything to the contrary in this Agreement,
Option Holder will be entitled to registration rights with respect to stock
acquired pursuant to this Agreement that are no less favorable to Option Holder
than any other registration rights provided by Company to any stockholder or
prospective stockholder of Company during the Option Term.

   d. CONSTRUCTION; SEVERABILITY. The section headings contained herein are for
reference purposes only and shall not in any way affect the meaning or
interpretation of this Agreement. The invalidity or unenforceability of any
provision of this Agreement shall not affect the validity or enforceability of
any other provision of this Agreement, and each other provision of this
Agreement shall be severable and enforceable to the extent permitted by law.

   e. BINDING EFFECT. This Agreement shall be binding upon and inure to the
benefit of Company and Option Holder and their respective heirs, executors,
administrators, legal representatives, successors and assigns.

   f. RIGHTS TO EMPLOYMENT. Nothing contained in this Agreement shall be
construed as giving Option Holder any right to be retained in the employ of
Company and this Agreement is limited solely to governing the rights and
obligations of Option Holder with respect to the Stock and the Option.

   g. GOVERNING LAW. This Agreement shall be governed by and construed in
accordance with the laws of the State of Colorado.

                                       15
<PAGE>   16

   h. GOVERNING DOCUMENT. From and after the date hereof, this Agreement amends,
restates and supercedes the Original Option Agreement in its entirety, and, in
the event of a conflict between the terms of this Agreement and the terms of the
Original Option Agreement, the terms of this Agreement shall govern.

   i. MARKET STANDOFF AGREEMENT. If requested by the Company or the
representative of the underwriters of Stock (or other securities) of the
Company, the Option Holder shall not sell or otherwise transfer or dispose of
any Stock (or other securities) held by such Option Holder (other than those
included in the registration) for a period specified by the representative of
the underwriters not to exceed one hundred eighty (180) days following the
effective date of a registration statement of the Company filed under the
Securities Act in connection with the initial public offering of the Stock and
not to exceed one hundred twenty (120) days following the effective date of each
registration statement following such offering, provided that all officers and
directors of the Company and all other persons with registration rights (whether
or not pursuant to this Agreement) enter into similar agreements.

      The obligations described in this section shall not apply to a
registration relating solely to employee benefit plans on Form S-1 or Form S-8
or similar forms that may be promulgated in the future, or a registration
relating solely to a transaction under Rule 145 promulgated under the Securities
Act of 1933, as amended, a transaction on Form S-4 or similar forms that may be
promulgated in the future. The Company may impose stop-transfer instructions
with respect to the shares of Stock (or other securities) subject to the
foregoing restriction until the end of the periods referenced in the preceding
paragraph.

                                       16
<PAGE>   17

         IN WITNESS WHEREOF, the parties have executed this Stock Option
Agreement as of the day and year first above written.

                                          KASTAR SATELLITE COMMUNICATIONS CORP.

                                          By: /s/ David M. Brown
                                              ----------------------------------
                                                  David M. Brown, Vice-President

                                          OPTION HOLDER

                                          /s/ Paul M. Froelich
                                          --------------------------------------
                                          Paul Froelich

                                       17<PAGE>   1
                                                                   EXHIBIT 10.26

                      KASTAR SATELLITE COMMUNICATIONS CORP.

                   AMENDED AND RESTATED STOCK OPTION AGREEMENT

         THIS AMENDED AND RESTATED STOCK OPTION AGREEMENT (the "Agreement") is
entered into as of May 26, 1999, between KASTAR SATELLITE COMMUNICATIONS CORP.,
a Delaware corporation (the "Company") and THOMAS E. MOORE (the "Option
Holder"). Certain capitalized terms used in this Agreement will have the
meanings specified in Section 14.

         A. WHEREAS, the Option Holder entered into that certain Stock Option
Agreement dated September 9, 1998 (the "Original Option Agreement") with KaStar
Satellite Communications Corp., a Colorado corporation ("KaStar Colorado"); and

         B. WHEREAS, pursuant to the Original Option Agreement, KaStar Colorado
granted to the Option Holder options (the "Original Options"), on the date and
the Option Price indicated (the "Original Option Price"), to acquire the
following number of shares of KaStar Colorado's no par value common stock
("KaStar Common Stock"):

<TABLE>
<CAPTION>

Date of                                  # of           Option Price                                   Cumulative
Grant         Source                    Options           Per Share      Valuation Source                Options
-------       ------                    -------         -------------    ----------------              ----------
<S>          <C>                        <C>             <C>             <C>                             <C>
10/1/98       Employment Contract       94.0860          $20,089.00      DirectCom Transaction           94.0860
10/19/98      Grant to David Brown       0.9581          $20,089.00      DirectCom Transaction           95.0441
1/19/99       TRW Transaction           11.8805          $42,000.00      TRW Transaction                106.9246
2/3/99        Grant to Michelle Kuska    0.3642          $42,000.00      TRW Transaction                107.2888
2/16/99       Grant to Andrew Sundelin   0.1830          $42,000.00      TRW Transaction                107.4719
3/15/99       Grant to Jeff Weaver       0.3679          $42,000.00      TRW Transaction                107.8398
5/1/99        Grant to Paul Froleich     0.7435          $42,000.00      TRW Transaction                108.5832
5/12/99       Grant to Tom Elliot        0.3756          $47,750.00      KP Transaction                 108.9588
</TABLE>

         C. WHEREAS, effective as of May 20, 1999, KaStar Colorado merged with
and into the Company the "Merger") for the principal purposes of effecting a
reincorporation of KaStar as a Delaware corporation and, at the same time,
restructuring KaStar's capital structure; and;

         D. WHEREAS, pursuant to the terms of the Original Option Agreement,
upon consummation of the Merger, all Options would have vested;

                                       1
<PAGE>   2

         E. WHEREAS, the Board wishes to clarify its intention in the first
sentence of Section 4(b) of the Original Option Agreement concerning the effect
on Option Holders and their Options of (1) the declaration by the Board and
payment by the Company of cash dividends and other cash distributions with
respect to the Company's Stock after the Effective Date and on or before the
date of exercise of an Option ("Paid Cash Dividends") and (2) declared but
unpaid dividends and the relative liquidation preferences of the holders of
Stock issued and outstanding on the record date of such dividend, and the
holders of Option Shares ("Unpaid Dividends"); and

         F. WHEREAS, pursuant to the terms of the Plan of Merger between the
Company and KaStar Colorado (the "Merger Agreement"), various rights to acquire
KaStar Colorado securities under the Original Option Agreement are converted as
specified in this Agreement; and

         G. WHEREAS, in a transaction dated as of the date hereof (the
"Transaction"), the Company is issuing 6,671,250 Series A Shares; and

         H. WHEREAS, as a result of the consummation of the Transaction,
pursuant to the terms of the Original Option Agreement, the Option Holder is
receiving an option grant (a "New Option Grant" entitling him to acquire "New
Option Shares" both as defined below) on the terms set forth herein; and

         I. WHEREAS, the Original Option Shares and the New Option Shares are
collectively referred to herein as the "Initial Option Shares" and

         J. WHEREAS, each Initial Option Grant and each Subsequent Option Grant
(as defined herein) is referred to herein as an "Option"; and

         K. WHEREAS, shares of the Company's equity securities, of any class or
series, are referred to herein as "Stock"; and

         L. WHEREAS, shares of Stock subject to Options are referred to herein
as "Option Shares"; and

         M. WHEREAS, the original effective date of this Agreement is October 1,
1998 (the "Effective Date").

                                       2
<PAGE>   3

             NOW THEREFORE, for and in consideration of the mutual promises and
covenants herein contained, it is mutually covenanted and agreed by the parties
hereto as follows:

1.   CONVERTED OPTION GRANTS; NEW OPTION GRANT; OPTION PRICE OF THE NEW OPTION
GRANT

     a. Converted Option Grants. In connection with the consummation of the
transactions under the Merger Agreement, (i) each share of KaStar Colorado's
Common Stock became, by operation of law, the right to receive 47,750 shares of
the Company's Series A Preferred Stock, $.001 par value per share ("Series A
Stock"), (ii) the Company assumed all of KaStar Colorado's obligations under the
Original Option Agreement, and (iii) each Original Option to acquire shares of
KaStar Colorado Common Stock under the Original Option Agreement became an
option to acquire 47,750 shares of Series A Stock, and the Original Option Price
for each Original Option was adjusted by dividing the Original Option Price in
effect immediately before the Merger by 47,750, such that the Option Holder now
holds options (the "Converted Options" or "Converted Option Grants") to acquire
Series A Stock (the "Converted Option Shares) as follows:

<TABLE>
<CAPTION>
Date of                                   # of            Option Price                                  Cumulative
Grant         Source                     Options            Per Share    Valuation Source                 Options
-------       ------                     -------          ------------   ----------------               -----------
<S>          <C>                         <C>              <C>           <C>                             <C>
10/1/98       Employment Contract        4,492,606            $.42       DirectCom Transaction          4,492,606
10/19/98      Grant to David Brown          45,749            $.42       DirectCom Transaction          4,538,355
1/19/99       TRW Transaction              567,294            $.88       TRW Transaction                5,105,649
2/3/99        Grant to Michelle Kuska       17,391            $.88       TRW Transaction                5,123,040
2/16/99       Grant to Andrew Sundelin       8,738            $.88       TRW Transaction                5,131,778
3/15/99       Grant to Jeff Weaver          17,567            $.88       TRW Transaction                5,149,345
5/1/99        Grant to Paul Froleich        35,502            $.88       TRW Transaction                5,184,847
5/12/99       Grant to Tom Elliot           17,935           $1.00       KP Transaction                 5,202,782
</TABLE>

     b. Subject to the terms and conditions of this Agreement, effective as of
the date hereof, the Company hereby grants to Option Holder an option (the "New
Option Grant") to purchase 346,646 Series A Shares (the "New Option Shares").
The Option Price for the New Option Grant shall be $1.00 per Series A Share.

                                       3
<PAGE>   4

2.   REQUIREMENTS FOR EXERCISE; VESTING.

     a. Except as otherwise specified herein, all Options shall be exercisable
as follows: (i) 25% on the date of this Agreement; and (ii) the remaining 75% as
follows:

<TABLE>
<CAPTION>

                                               Percentage of Option That Shall
        Vesting  Date                          Become Exercisable on Such Date
        -------------                          -------------------------------
<S>                                          <C>
       October 1, 1999                                       25%
       October 1, 2000                                       25%
       October 1, 2001                                       25%
</TABLE>

     b. Except as otherwise specified in this Agreement, an Option shall not be
exercisable as to any shares of Stock as to which the vesting requirement has
not been satisfied. Any Option that is granted after a vesting date shall be
deemed to be vested on the grant date of such Option as to that percentage of
such Option (without regard to its actual grant date) that would have vested if
such Option had actually been granted on the Effective Date. The number of
shares of Stock as to which an Option may be exercised shall be cumulative, so
that once the Option shall have vested and become exercisable as to any shares
of Stock, it shall continue to be exercisable as to such shares until expiration
or termination of the Option as provided in Section 7 of this Agreement.

3.   METHOD FOR EXERCISING THE OPTION.

     a. An Option may be exercised only by delivery of written notice of
exercise, together with payment of the Option Price as provided below, in person
or through certified or registered mail, fax or overnight delivery to Company at
the following address: 9137 East Mineral Circle, Suite 140, Englewood, Colorado
80112, Attn: David M. Brown, or such other address as shall be furnished in
writing to Option Holder by Company. Such written notice shall specify that the
Option is being exercised, and the number of shares of Stock with respect to
which the Option is exercised, accompanied by payment of the Option Price. If
the shares of Stock covered by this Option are not issued in a registered
transaction, the issuance of the shares will be subject to the receipt by
Company of appropriate investment representations from Option Holder and the
certificate representing such shares of Stock shall bear such standard legends
as may be required by Company in order to assure compliance with federal and
state securities laws, and such other restrictions on transfer or registration
of transfer as may be imposed in accordance with applicable law.

     b. The purchase of such Stock shall take place at the address of Company
set forth above upon delivery of the notice of exercise, at which time the
Option Price for the Stock shall be paid in full, at the option of Option
Holder, by (i) certified or cashier's check payable to Company's order, or by
wire transfer to such account as may be specified by Company for this purpose,
or (ii) delivery to Company of certificates representing the number of shares of
Stock then owned by Option Holder, the Fair Market Value of which equals the
Option Price of the Stock to be purchased pursuant to the Option, properly
endorsed for transfer to Company; provided, however, that no

                                       4
<PAGE>   5

Option may be exercised by delivery to Company of certificates representing
Stock, unless such Stock has been held by Option Holder for more than six months
or (iii) a reduction in the number of shares of Stock issuable upon exercise of
the Option by that number of shares having an aggregate Fair Market Value in
excess of the applicable Option Price therefor equal to the aggregate Option
Price of the Stock to be purchased pursuant to the Option. For purposes of this
Option, the Fair Market Value of any shares of Stock delivered in payment of the
Option Price upon exercise of the Option shall be the Fair Market Value as of
the exercise date; the exercise date shall be the day of delivery of the
certificates for the Stock used as payment of the Option Price.

     c. Upon such notice to Company and payment of the Option Price, the
exercise of the Option shall be deemed to be effective, and a properly executed
certificate or certificates representing the Stock so purchased shall be issued
by Company and delivered to Option Holder.

     d. In lieu of issuing any fractional shares upon any exercise of the
Option, Company will pay Option Holder in cash an amount equal to the difference
between the Option Price and Fair Market Value of such fractional share (so if
the Option Price and Fair Market Value were $100 and $1,000, respectively, for a
full share, they would be $75 and $750 for a 3/4 fractional share, and Company
would pay $675 upon such exercise).

4.   ADJUSTMENT OF AN OPTION.

     a. If at any time Company increases or decreases the number of its
outstanding shares of Stock, of any class or series, or changes in any way the
rights and privileges of such shares, by means of the payment of a stock
dividend or the making of any other distribution on such shares payable in
Stock, or through a Stock split or subdivision of shares, or a consolidation or
combination of shares, or through a reclassification or recapitalization
involving the Stock, the numbers, rights and privileges of the shares of Stock
included in the Option shall be increased, decreased or changed in like manner
as if such shares had been issued and outstanding, fully paid and non-assessable
at the time of such occurrence. In addition, the Option Price per share will be
adjusted as necessary so that the aggregate Option Price that would be payable
upon full exercise of the Option would not be affected by such occurrence (for
example, if the number of shares of Stock included in the Option were doubled as
a result of a two for one stock split, the Option Price per share would be
halved).

     b. If Company shall at any time (i) distribute with respect to its Stock
securities of persons other than Company or other assets (including Paid Cash
Dividends on such Stock, but excluding distributions referred to in subsection
(a)) or (ii) declare any Unpaid Dividend that is not addressed in clause (i) or
grant to the holders of its Stock rights to subscribe pro rata for additional
shares thereof or for any other securities of the Company or there shall be any
other change (except as described in subsection (a)) in the number or kind of
outstanding shares of Stock or of any stock or other securities into which the
Stock shall be changed or for which it shall have been exchanged, then in any
such event, Option Holder will, without additional cost, be entitled to receive
upon any exercise of the Option, in addition to the shares of Stock as to which
the Option is so exercised, the number of securities or other assets (including
Paid Cash Dividends and/or all rights with respect

                                       5
<PAGE>   6

to Unpaid Dividends (as the case may be) on such Stock, including, but not
limited to, an increase in the liquidation preference with respect to such Stock
in accordance with the terms of the Company's Certificate of Incorporation, if
any) or rights that Option Holder would have been entitled to receive as if such
shares of Stock had been issued and outstanding, fully paid and non-assessable
at the time of such occurrence. However, it is intended that this Section 4(b)
shall not duplicate the effect of Section 5 with respect to the issuance of
additional shares of Stock to any Person.

     c. Notwithstanding anything to the contrary contained herein, if at any
time the Company enters into any of the transactions described herein or any
other equity restructuring transaction, changes shall be made to the Options in
order to restore Option Holder's economic position prior to such restructuring
in accordance with all of the following criteria:

        i. the aggregate intrinsic value (difference between Fair Market Value
and Option Price per share) of the Options immediately after the change may not
be greater or less than the aggregate intrinsic value of the Options immediately
before the change; and

        ii. the vesting provisions and Option Period of the original grant will
remain the same.

5.   GRANT OF ADDITIONAL OPTION. If, during the period beginning upon the
Effective Date and ending upon the earlier of the closing of an initial public
offering ("IPO") of the Company's Stock, and five years from the Effective Date
(the "Initial Period"), the Company issues additional shares of its equity
securities or Stock Rights in any transaction (including without limitation, the
IPO and any option to acquire Stock granted to employees of the Company) that
does not result in an adjustment to the Option pursuant to the provisions of
Section 4 (a "Dilutive Event"), and, as of the date of such Dilutive Event the
number of shares of Stock covered by this Option shall be less than 7.0% of the
outstanding equity securities of Company on a fully diluted basis immediately
following such occurrence, then the following will apply:

     a. The Company shall grant to the Option Holder an option (each such grant,
a "Subsequent Option Grant") to acquire additional shares of Stock such that the
number of shares of Stock as to which the Option (including all Subsequent
Option Grants and all previously exercised Options) will be exercisable
represents, after giving effect to the applicable occurrence, 7% of the
outstanding shares of each class of Company's equity securities on a fully
diluted basis. On the date of the Dilutive Event, the Company and the Option
Holder shall enter into an Option Grant Agreement in the form of Exhibit A
hereto evidencing the Subsequent Option Grant. The Company's failure to execute
and deliver an Option Grant Agreement shall not affect the Option Holder's right
to exercise an Option, including, but not limited to, Options granted pursuant
to a Subsequent Option Grant.

     b. Subsequent Option Grants and the shares issuable upon exercise thereof,
shall be considered to have vested, or will vest, for purposes of Section 2, on
the same dates and in the same percentages as the Initial Option Shares vest.

                                       6
<PAGE>   7

     c. The price per share for Subsequent Option Grants will be equal to (i)
with respect to each such share relating to a Stock Right, the per share
purchase price applicable upon exercise of the corresponding Stock Right, and
(ii) with respect to each share relating to issuance of equity securities by
Company other than pursuant to a Stock Right, the price per share of such Stock
received by Company in the transaction giving rise to the applicable shares
(including cash and noncash consideration), provided that if the Board and the
Option Holder are unable to agree on the value of any noncash consideration
included in such price, each in their reasonable discretion, the value of the
noncash consideration will be the Appraised Noncash Consideration Value. Upon
any exercise, Option Holder will designate the Option Shares (i.e., the date of
the Option grant and the associated Option Price) as to which he is exercising
the Option.

     d. Except as specified in subparagraphs (a), (b) and (c) above, the Option
Shares received by the Option Holder pursuant to a Subsequent Option Grant will,
in all respects, be treated in the same manner under this Agreement as the
Initial Option Shares, including without limitation, under Section 4.

     e. In any case where Option Holder's Option is treated as fully vested
under this Agreement prior to the end of the Initial Period, he may exercise his
Option as to all or any portion of the shares covered, plus any additional
shares that would be subject to the Option if such event that is the cause for
such vesting is deemed to be the end of the Initial Period under this Section 5.

     f. For purposes of this Agreement, "fully diluted" will treat as issued and
outstanding all into which outstanding securities of any class (including, but
not limited to, convertible debt) may be exchanged or converted at the option of
Company or holder or which any Person has an option or other right to acquire.
Any such security or instrument that causes Stock which is not issued and
outstanding to be treated as issued and outstanding for purposes of "fully
diluted" calculations under this Agreement are referred to as "Stock Rights."

6.   REORGANIZATION; CHANGE OF CONTROL.

     a. Not less than 30 days prior to consummation of any Fundamental Change,
the Company will give Option Holder written notice of such Fundamental Change.
Such notice shall be deemed to have been given when delivered personally to
Option Holder or when mailed to Option Holder by registered or certified mail,
postage prepaid, or by Federal Express or similar established courier service,
at Option Holder's address last known to the Company. If, in connection with
such Fundamental Change, the Company does not take the action specified in
Section 6(b) and if Option Holder does not exercise his option within the time
specified in Section 6(c), then the Option shall automatically terminate and be
of no further force and effect whatsoever, without the necessity for any
additional notice or other action by the Company. "Fundamental Change" means (i)
the merger or consolidation of Company with or into another corporation (other
than (a) a consolidation or merger in which the Company is the continuing
corporation and which does not result in any reclassification or change of
outstanding shares of Stock, or (b) if the Company is not the continuing

                                       7
<PAGE>   8

corporation, a merger or consolidation (or a series of mergers or
consolidations) which result in less than 50% of the surviving company's equity
securities or voting power owned by Persons that were stockholders of the
Company prior to the first such transaction(s)); or (ii) the sale or conveyance
of the property of Company as an entirety or substantially as an entirety (other
than a sale or conveyance in which Company continues as a holding company of an
entity or entities that conduct the business or businesses formerly conducted by
Company); (iii) the dissolution or liquidation of Company; or (iv) any "person"
or "group" (as such terms are used in Sections 13(d) and 14(d) of the Securities
and Exchange Act of 1934, as amended (the "Exchange Act"), or any successor
provisions to either of the foregoing), including any group acting for the
purpose of acquiring, holding, voting or disposing of securities within the
meaning of Rule 13d-5(b)(1) under the Exchange Act, is (including as a result of
consolidation or merger, sale, transfer, lease, conveyance or other disposition
of assets, or otherwise) or becomes the "beneficial owner" (as defined in Rule
13d-3 under the Exchange Act), directly or indirectly, of more than 50% (or,
after the closing of the IPO, 35%) of the total voting power of the Stock (for
purposes of this clause (iv), such person or group shall be deemed to
beneficially own any securities of any nature of an entity (the "specified
entity") held by any other entity (the "parent entity") so long as such person
or group beneficially owns, directly or indirectly, in the aggregate a majority
of the total equity interests of such parent entity). Notwithstanding the
foregoing, the sale or conveyance of the assets of a division of Company that
does not constitute a sale of substantially all of Company's assets shall not
constitute a Fundamental Change.

     b. In the case of a Fundamental Change described in clauses (i) or (ii) of
Section 6(a), the Company, or the successor or purchaser may, as the case may
be, at their election, make adequate provision for the assumption of the Option
or the substitution of new options for the Option on terms comparable to the
Option except that Option Holder shall have the right thereafter to purchase the
kind and amount of shares of stock or other securities or property or cash
receivable upon such merger, consolidation, sale or conveyance by a holder of
the number of shares of Stock that would have been receivable upon exercise of
the Option immediately prior to such merger, consolidation, sale or conveyance
(assuming such holder of Stock was fully vested and failed to exercise any
rights of election and received per share the kind and amount received per share
by a majority of the non-electing shares). The provisions of this Section 6
shall similarly apply to successive mergers, consolidations, sales or
conveyances. The Company, or the successor or purchaser, as the case may be,
shall give the Option Holder written notice of its election to, or not to,
assume the Option as contemplated by this Section 6(b) not less than 15 days
prior to the Fundamental Change. Failure to give such notice timely shall
obligate the Company, or the successor or purchaser, as the case may be, to
assume the Option and make such provisions as are required by this Section 6(b).

     c. If Option Holder is notified, in accordance with Sections 6(a) and 6(b)
of a Fundamental Change and that the Company, or the successor or purchaser, as
the case may be is not going to assume the Option, he may exercise his Option at
any time before the later of (i) 30 days after Option Holder's receipt of such
notice or (ii) the occurrence of the Fundamental Change (but subject to
occurrence of such event), regardless of whether all conditions of exercise
relating to

                                       8
<PAGE>   9

length of service have been satisfied. However, if the Stock is not publicly
traded at the time of any such Fundamental Change, Company shall have the right
to cancel the Option through payments to Option Holder of an amount equal to the
difference between the Option Price for such shares covered by the Option and
the Fair Market Value of such shares as of the last day of the month prior to
the date of such transaction. Company shall make its election to cancel the
Option in accordance with this provision at any time prior to the occurrence of
the transaction through written notice to Option Holder and payment to Option
Holder by wire transfer of immediately available funds to such account(s)
designated by Option Holder of the amount so determined within 20 days following
the date of delivery of written notice to Option Holder of Company's exercise of
its right hereunder.

7.   EXPIRATION AND TERMINATION OF THE OPTION. The Option shall expire ten years
from the Effective Date (the period from the Effective Date to the expiration
date is the "Option Period") or prior to such time as follows:

     a. If the employment of Option Holder by Company is terminated for "Cause"
within the Option Period, (i) the Company's obligation to make Subsequent Option
Grants shall terminate immediately upon the termination of employment of Option
Holder, and (ii) the Option may be exercised by Option Holder (only with respect
to that portion of the Option which has vested as of such date in accordance
with the terms of this Agreement) at any time within three months following the
date of such termination (provided that such exercise must occur within the
Option Period), but not thereafter (except as provided in subparagraph (c)
below). For purposes of this Agreement, "Cause" shall be defined in the same
manner as it is defined in the letter agreement dated September 9, 1998 between
Option Holder and KaStar Satellite Communications Corp.

     b. If the employment of Option Holder by Company is terminated voluntarily
by Option Holder within the Option Period, (i) the Company's obligation to make
Subsequent Grants shall terminate immediately upon the termination of employment
of Option Holder, and (ii) the Option may be exercised by Option Holder (only
with respect to that portion of the Option which has vested as of such date in
accordance with the terms of this Agreement) at any time within three months
following the date of such termination (provided that such exercise must occur
within the Option Period), but not thereafter (except as provided in
subparagraph (c) below).

     c. If the employment of Option Holder by Company is terminated by Company
within the Option Period for any reason other than Cause, "Disability" or death,
the Option shall become 100% vested and exercisable and may be exercised by
Option Holder at any time following the date of such termination (provided that
such exercise must occur within the Option Period), and the Company's obligation
to make Subsequent Grants hereunder shall be unaffected by the termination of
the Option Holder's employment. If Option Holder terminates employment with
Company because Company requests Option Holder to relocate from the greater
Denver, Colorado metropolitan area and Option Holder declines to so relocate, or
because Option Holder is required to accept a reduction in base salary or
benefits, then in any such case Option Holder's termination of employment shall
be considered to be termination by Company for reasons other than Cause,

                                       9
<PAGE>   10

Disability or death and the Option shall become 100% vested and exercisable in
accordance with the preceding sentence.

     d. If Option Holder dies within the Option Period, while employed by
Company, the Option may be exercised by those entitled to do so under his will
or by the laws of descent and distribution within one year following his death
(provided that such exercise must occur within the Option Period), but not
thereafter. In any such case, the Option may be exercised only as to the shares
of Stock as to which the Option had become exercisable on or before the date of
Option Holder's death.

     e. If Option Holder becomes Disabled with the Option Period, while employed
by Company, the Option may be exercised within one year following his
termination of employment (provided that such exercise must occur within the
Option Period), but not thereafter. In any such case the Option may be exercised
only as to the shares of Stock as to which the Option had become exercisable on
or before the date of Option Holder's Disability, and the Company's obligation
to make Subsequent Grants shall terminate on the date on which the Option Holder
becomes disabled. For purposes of this Agreement, Option Holder shall be
considered to be "Disabled" if he is disabled in accordance with the provisions
of section 22(e)(3) of the Internal Revenue Code of 1986, as amended (the
"Code").

8.   COMPANY RIGHT TO REACQUIRE STOCK AND TERMINATE OPTION. If the employment of
Option Holder with Company terminates prior to an IPO due to a termination for
Cause or a termination by Option Holder (but not any termination by Option
Holder described in Section 7(c), (d) or (e), as to which this Section 8 will
not be applicable), Company shall have the right to purchase from Option Holder
all shares of Stock previously acquired pursuant to the exercise of the Option,
and to cancel all of the portion of the Option with respect to any shares of
Stock that may be acquired by Option Holder under the terms of the Option at the
date of his termination of employment. Company shall exercise its right to
purchase such shares of Stock, and cancel the Option, through a written notice
delivered to Option Holder within 30 days following such termination of Option
Holder's employment. The purchase price for such Stock will be equal to the Fair
Market Value as of the end of the month immediately preceding the date of
termination of employment of Option Holder. The purchase price for cancellation
of the exercisable portion of the Option will be an amount equal to the
difference between the aggregate Fair Market Value and the Option Price for such
shares, determined as of the date specified in the immediately preceding
sentence. Payment for any shares of Stock acquired by Company or any portion of
the Option canceled by Company in accordance with this Section 8 shall be made
within 20 days following the delivery of written notice to Option Holder of
Company's exercise of its right to acquire such shares of Stock and cancel such
portion of the Option by wire transfer of immediately available funds to such
account(s) as may be designated by Option Holder in writing and the closing of
the transaction shall occur at the offices of Company.

                                       10
<PAGE>   11

9.   TRANSFERABILITY OF OPTION AND STOCK.

     a. The Option may not be transferred except by will or pursuant to the laws
of descent and distribution, and it shall be exercisable during Option Holder's
life only by him, or in the event of Disability or incapacity, by his guardian
or legal representative, and after his death, only by those entitled to do so
under his will or the applicable laws of descent and distribution. Except as
specifically provided herein, upon any attempt to transfer, assign, pledge,
hypothecate or otherwise dispose of the Option or any right or privilege granted
hereunder, or upon the levy of any attachment or similar process upon the rights
and privileges herein conferred, the Option and the rights and privileges
hereunder shall become immediately null and void.

     b. Shares of Stock acquired pursuant to this Option may not be transferred
by Option Holder without the prior written consent of Company until the date of
an IPO, at which time this restriction shall lapse, and certificates
representing such shares will be legended accordingly.

10.  CONFIDENTIAL INFORMATION.

     a. Option Holder acknowledges that the trade secrets, know how and
proprietary processes of Company and its confidential business plans,
strategies, concepts, prospects and financial data (collectively "Confidential
Information") are valuable, unique assets of Company. Option Holder shall not,
during or after the term of this Agreement, disclose any of the Confidential
Information (unless already generally known to and available for use by the
public other than as a result of Option Holder's acts in violation of this
Section or as required by law) to any person or entity for any purpose, nor
shall Option Holder use any Confidential Information except, in either case, as
is required in Option Holder's reasonable judgment for Option Holder to perform
his duties as an employee of Company.

     b. Option Holder will, upon termination of his employment with Company,
deliver to Company all records, forms, contracts, studies, reports, appraisals,
financial data, lists of names or other customer or supplier data, and any other
articles or papers, computer tapes and materials that have come into his
possession by reason of his employment with Company, whether or not prepared by
him, and he shall not retain memoranda or copies of any of those items.

11.  WITHHOLDING. As a condition to the issuance of any Stock hereunder, Option
Holder shall make appropriate arrangements with Company to provide for the
amount of any withholding required by Sections 3102 and 3402 of the Code and
applicable state income tax laws.

12.  LIMITATION OF RIGHTS. Option Holder or his successor shall have no rights
as a stockholder with respect to the shares of Stock covered by this Option
until Option Holder or his successors become the holder of record of such
shares.

13.  STOCK RESERVE. Company shall at all times during the term of this Agreement
reserve and keep

                                       11
<PAGE>   12

available such number of shares of Stock as will be sufficient to satisfy the
requirements of this Agreement, and Company shall pay all original issue taxes
(if any) on the exercise of the Option, and all other fees and expenses
necessarily incurred by Company in connection therewith.

14.  DEFINED TERMS.

     a. The following capitalized terms will have the meanings set forth below
for purposes of this Agreement:

          i. "Appraised Fair Market Stock Value" means the value of Stock
determined as follows:

               A. Company and Option Holder will attempt to agree on the Stock
Value within 10 days after initiation by either. If they are unable to agree,
they will attempt to select a single appraiser to make such determination.

               B. If Company and Option Holder cannot agree on a single
appraiser within five days after the end of such initial 10-day period, then
within an additional ten-day period, Company will select one qualified
independent appraiser, and Option Holder will select one qualified independent
appraiser, and each of the two selected appraisers will determine the Stock
value. If either fails to select an appraiser within the applicable time period,
then the appraiser selected by the other will be the sole appraiser. If only one
appraiser is used, the Stock value will be as determined in such appraisal.

               C. If two appraisals are used, and if the applicable Stock value
determined by the higher of the two appraisals is not greater than 110% of the
Stock value determined by the lower of the two appraisals, the Stock value will
be equal to the average of the two appraisals; however, if the two appraisals do
not fall within this range, the two appraisers selected by the parties will
select a third qualified independent appraiser to determine the applicable Stock
value.

               D. If a third appraisal is necessary, then the Stock value will
be equal to the average of the two of the three appraisals that are closest to
one another (or if the highest and lowest appraisal are equidistant from the
middle, then such Stock value will be equal to the middle appraisal).

               E. In determining the Appraised Fair Market Stock Value, each
party will pay the costs of its appraiser and the parties will split the costs
of a single appraiser or a third appraiser, if applicable.

          ii. "Appraised Noncash Consideration Value" means the value of noncash
consideration determined as follows:

               A. Company and Option Holder will attempt to agree on the value
of noncash consideration within 10 days after initiation by either. If they are
unable to agree, they will attempt to select a single appraiser to make such
determination.

                                       12
<PAGE>   13

               B. If Company and Option Holder cannot agree on a single
appraiser within five days after the end of such initial 10-day period, then
within an additional ten-day period, Company will select one qualified
independent appraiser, and Option Holder will select one qualified independent
appraiser, and each of the two selected appraisers will determine the value of
noncash consideration. If either fails to select an appraiser within the
applicable time period, then the appraiser selected by the other will be the
sole appraiser. If only one appraiser is used, the value of noncash
consideration will be as determined in such appraisal.

               C. If two appraisals are used, and if the applicable value of
noncash consideration determined by the higher of the two appraisals is not
greater than 110% of the value of noncash consideration determined by the lower
of the two appraisals, the value of noncash consideration will be equal to the
average of the two appraisals; however, if the two appraisals do not fall within
this range, the two appraisers selected by the parties will select a third
qualified independent appraiser to determine the applicable value of noncash
consideration.

               D. If a third appraisal is necessary, then the value of noncash
consideration will be equal to the average of the two of the three appraisals
that are closest to one another (or if the highest and lowest appraisal are
equidistant from the middle, then such value of noncash consideration will be
equal to the middle appraisal).

               E. Company will pay all appraisal costs in connection with
determining the Appraised Noncash Consideration Value.

          iii. "Average Trading Price" of any stock will mean the average of the
reported closing market prices of such stock for the 10 consecutive trading days
(or, if a market for such stock first comes into being during such 10-trading
day period, those trading days during such period for which reported market
prices for such stock are available) ending on the third trading day prior to
the date of exercise of the Option. The closing market price for each day in
question will be the last sale price, regular way or, if no such sale takes
place on such day, the average of the closing bid and asked prices, regular way,
in either case as reported in the principal consolidated transaction reporting
system of the principal national securities exchange on which such stock is
listed or admitted to trading or, if such stock is not listed or admitted to
trading on any national securities exchange, the last quoted sale price or, if
no such sale price is quoted, the average of the high bid and low asked prices
in the over-the-counter market, as reported by the Nasdaq National Market System
("Nasdaq") or such other system then in use or, if on any such trading day such
capital stock is not quoted by any such organization, the average of the closing
bid and asked prices as furnished by the professional market maker who has been
most active in making a market in such capital stock during the preceding 12
months. The Average Trading Price of such stock will be appropriately and
equitably adjusted to reflect the effects of any stock dividend, stock split,
reclassification, recapitalization, combination or distribution of assets,
securities or other property (other than ordinary course cash dividends) to
holders of such stock by the issuer thereof affecting such stock,

                                       13
<PAGE>   14

the record date, ex-dividend date or similar date of which occurs during the
period in which the Average Trading Price is to be determined or thereafter
prior to the date of the consummation of the purchase or transaction for which
Fair Market Value is being determined.

          iv. "Board" means the Board of Directors of Company.

          v. "Fair Market Value" means after an IPO with respect to the class of
the Stock in question, the Average Trading Price of such Stock or, prior to such
IPO, the Appraised Fair Market Stock Value.

          vi. "Option Price" means, as to any shares of Stock, the price per
share at which the Option Holder has the right to acquire such shares, as
determined in accordance with the terms of this Agreement.

          vii. "Person" means any individual, corporation, partnership, limited
liability company, trust or other entity.

          viii. In addition, the definitions for the following terms are in the
Sections indicated below:

<TABLE>
<CAPTION>

              Term                               Section
              ----                               -------
             <S>                                <C>
              Agreement                          Introduction
              Cause                              7(a)
              Code                               7(e)
              Company                            Introduction
              Confidential Information           10(a)
              Converted Option Grants            1(a)
              Converted Option Shares            1(a)
              Converted Options                  1(a)
              Dilutive Event                     5
              Disabled                           7(e)
              Effective Date                     Recital M
              Fundamental Change                 6(a)
              Initial Option Shares              Recital I
              Initial Period                     5
              IPO                                5
              KaStar Colorado                    Recital A
              KA Star Common Stock               Recital B
              Merger                             Recital C
              Merger Agreement                   Recital F
              New Option Grant                   Section 1(b)
              New Option Shares                  Section 1(b)
              Option                             Recital J
              Option Holder                      Introduction
              Option Period                      7
              Option Shares                      Recital L
              Original Option Agreement          Recital A
              Original Option Price              Recital B
              Original Options                   Recital B
              Paid Cash Dividend                 Recital E
              Series A Stock                     Section 1(a)
              Stock                              Recital K
              Stock Right                        5(f)
              Subsequent Option Grant            5(a)
              Transaction                        Recital G
              Unpaid Dividends                   Recital E
</TABLE>

                                       14
<PAGE>   15

15.  MISCELLANEOUS.

     a. NOTICES. Any notice required or permitted to be given under this
Agreement shall be in writing and shall be given by first class registered or
certified mail, postage prepaid, or by personal delivery to the appropriate
party, addressed:

         i. If to Company, to David M. Brown, General Counsel, KaStar Satellite
Communications Corp., 9137 East Mineral Circle, Suite 140, Englewood, Colorado
80112, or at such other address as may have been furnished to Option Holder in
writing by Company; or

         ii. If to Option Holder, to Thomas Moore, 10 Lynn Road, Englewood,
Colorado 80110 or at such other address as may have been furnished to the
Company in writing by Option Holder.

Any such notice shall be deemed to have been given as of the second day after
deposit in the United States mails, postage prepaid, properly addressed as set
forth above, in the case of mailed notice, or as of the date delivered in the
case of personal delivery.

     b. AMENDMENT. Except as provided herein, this Agreement may not be amended
or otherwise modified unless evidenced in writing and signed by Company and
Option Holder.

     c. COMPLIANCE WITH SECURITIES LAWS. This Agreement shall be subject to the
requirement that if at any time counsel to Company shall determine that the
listing, registration or qualification of the shares of Stock subject to the
Option upon any securities exchange or under any state or federal law, or the
consent or approval of any governmental or regulatory body, is necessary as a
condition of, or in connection with, the issuance or purchase of such shares
thereunder, the Option may not be exercised in whole or in part unless such
listing, registration, qualification, consent or approval shall have been
effected or obtained on conditions acceptable to the Board. Nothing herein shall

                                       15
<PAGE>   16

be deemed to require Company to apply for or obtain such listing, registration
or qualification. Notwithstanding anything to the contrary in this Agreement,
Option Holder will be entitled to registration rights with respect to stock
acquired pursuant to this Agreement that are no less favorable to Option Holder
than any other registration rights provided by Company to any stockholder or
prospective stockholder of Company during the Option Term.

     d. CONSTRUCTION; SEVERABILITY. The section headings contained herein are
for reference purposes only and shall not in any way affect the meaning or
interpretation of this Agreement. The invalidity or unenforceability of any
provision of this Agreement shall not affect the validity or enforceability of
any other provision of this Agreement, and each other provision of this
Agreement shall be severable and enforceable to the extent permitted by law.

     e. BINDING EFFECT. This Agreement shall be binding upon and inure to the
benefit of Company and Option Holder and their respective heirs, executors,
administrators, legal representatives, successors and assigns.

     f. RIGHTS TO EMPLOYMENT. Nothing contained in this Agreement shall be
construed as giving Option Holder any right to be retained in the employ of
Company and this Agreement is limited solely to governing the rights and
obligations of Option Holder with respect to the Stock and the Option.

     g. GOVERNING LAW. This Agreement shall be governed by and construed in
accordance with the laws of the State of Colorado.

     h. GOVERNING DOCUMENT. From and after the date hereof, this Agreement
amends, restates and supercedes the Original Option Agreement in its entirety,
and, in the event of a conflict between the terms of this Agreement and the
terms of the Original Option Agreement, the terms of this Agreement shall
govern.

     i. MARKET STANDOFF AGREEMENT. If requested by the Company or the
representative of the underwriters of Stock (or other securities) of the
Company, the Option Holder shall not sell or otherwise transfer or dispose of
any Stock (or other securities) held by such Option Holder (other than those
included in the registration) for a period specified by the representative of
the underwriters not to exceed one hundred eighty (180) days following the
effective date of a registration statement of the Company filed under the
Securities Act in connection with the initial public offering of the Stock and
not to exceed one hundred twenty (120) days following the effective date of each
registration statement following such offering, provided that all officers and
directors of the Company and all other persons with registration rights (whether
or not pursuant to this Agreement) enter into similar agreements.

     The obligations described in this section shall not apply to a registration
relating solely to employee benefit plans on Form S-1 or Form S-8 or similar
forms that may be promulgated in the future, or a registration relating solely
to a transaction under Rule 145 promulgated under the Securities Act of 1933, as
amended, a transaction on Form S-4 or similar forms that may be promulgated in
the future. The Company may impose stop-transfer instructions with respect to
the shares of Stock (or other securities) subject to the foregoing restriction
until the end of the periods referenced in the preceding paragraph.

                                       16
<PAGE>   17

     IN WITNESS WHEREOF, the parties have executed this Stock Option Agreement
as of the day and year first above written.

                              KASTAR SATELLITE COMMUNICATIONS CORP.

                              By: /s/ David M. Brown
                                  ---------------------------------------------
                                  David M. Brown, Vice-President

                              OPTION HOLDER

                              /s/ Thomas E. Moore
                              -------------------------------------------------
                              Thomas E. Moore

                              RATIFIED

                              KASTAR SATELLITE COMMUNICATIONS CORP.

                              By: /s/ David M. Drucker
                                  ---------------------------------------------
                                  David M. Drucker, Chairman

                                       17

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