SATELLOON
A satelloon is a satellite that is inflated with gas after it has been put into the orbit. Some satelloons which were successfully launched by U.S. are ECHO 1, EXPLORER 9, PAGEOS 1, etc.
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communication satellite, echo 1 This is a postage stamp issued by U.S. post office
commemorating project echo 1 on December 15,1960.
![]() ![]() PAGEOS 1 |
