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        [GROSS, KLEINHENDLER, HODAK, HALEVY, GREENBERG & CO. LETTERHEAD]

                                                                     Exhibit 5.1

                                                      Tel Aviv, October 11, 2001
                                                      Our ref: 9308/1501

Gilat Satellite Networks Ltd.
21 Yegia Kapayim Street
Daniv Park, Kiryat Arye
Petah Tikva 49130
Israel

Re:  REGISTRATION STATEMENT ON FORM F-4 FOR GILAT SATELLITE NETWORKS LTD.

Ladies and Gentlemen:

We are Israeli counsel to Gilat Satellite Networks Ltd. (the "Company"), and
have acted as such in connection with the preparation of a Registration
Statement on Form F-4 (the "Registration Statement"), to be filed by the
Company with the Securities and Exchange Commission (the "Commission") on
October 11, 2001 under the Securities Act of 1933, as amended (the "Act"), in
connection with the issuance of up to 466,105 ordinary shares, par value NIS
0.01 per share, of the Company (the "Ordinary Shares"), upon the exercise of an
option granted to rStar Corporation ("rStar") to purchase the Ordinary Shares
(the "Option") in connection with an exchange offer for up to 6,315,789 shares
of common stock of rStar.

In rendering this opinion, we have examined and relied upon a copy of the
Registration Statement. We have also examined, or have arranged for the
examination by an attorney or attorneys under our general supervision, originals
or copies of originals, certified or otherwise identified to our satisfaction,
of all agreements, documents, certificates and other statements of governmental
officials and other instruments, and we have examined such questions of law and
have satisfied ourselves as to such matters of fact, as we have considered
relevant and necessary as a basis for this opinion. In our examination, we have
assumed the legal capacity of all natural persons, the genuineness of all
signatures, the authenticity of all documents submitted to us as originals, the
conformity with the original of all documents submitted to us as certified or
photostatic copies and the authenticity of the originals of such latter
documents. As to any facts material to the opinions expressed herein which were
not independently established or verified, we have relied upon oral or written
statements and representations of officers and other representatives of the
Company and others.

We are advocates qualified to practice law only in the State of Israel and are
not admitted to practice in any other jurisdiction, nor are we or do we purport
to be experts on the laws of any other jurisdiction. The opinions expressed
herein are rendered solely with respect to the laws of the State of Israel.

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        [GROSS, KLEINHENDLER, HODAK, HALEVY, GREENBERG & CO. LETTERHEAD]


Based on and subject to the foregoing and to the other qualifications and
limitations set forth herein, we are of the opinion that the Ordinary Shares
will be legally issued, fully paid and nonassessable upon their issuance in
accordance with the terms of the Option.

We hereby consent to use of our name in the Registration Statement under the
caption "Taxation" and "Legal Matters" and to the filing of this opinion as an
exhibit to the Registration Statement.


                         Very truly yours,

                         /s/ Gross, Kleinhendler, Hodak, Halevy, Greenberg & Co.

                         Gross, Kleinhendler, Hodak, Halevy, Greenberg & Co.


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