Vanguard 1

Author(en): toutatis

Veröffentlichungsdatum:

Vanguard 1 is a US artificial satellite that was the fourth spacecraft to be successfully launched (following Sputnik 1, Sputnik 2, and Explorer 1) Launched in March 17, 1958 it was the first satellite to have solar electric power. Although communications with the satellite were lost in May 1964, it remains the oldest human-made object still in orbit, together with the upper stage of its launch vehicle.

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