Explorer 1

19582 m longScience satellite

LocationSpace (LEO)

Year1958

Size2 m long

TypeScience satellite

About Explorer 1

The first American satellite. Launched on January 31, 1958. Discovered the Van Allen radiation belts. Weighed only 13.97 kg. Built by the Jet Propulsion Laboratory. Operated for 111 days until its batteries died.

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Sputnik 2

1957Science satellite

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