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Sputnik 1
Artificial satellite
Sputnik 1 was the first artificial Earth satellite. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957 as part of the Soviet space program. It sent a radio signal back to Earth for three weeks before its three... Wikipedia
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NASA Logo. Sputnik Home · Background History · Bibliography · Biographies · Chronology · Documents · Explorer · The International Geophysical Year.
On October 4, 1957, the Soviet Union launched the earth's first artificial satellite, Sputnik-1. The successful launch came as a shock to experts and citizens ...