First satellite
Explorer 1 was the first satellite launched by the United States and was part of the U.S. participation in the International Geophysical Year (IGY). ,Planned first satellites — The first artificial satellite was Sputnik 1, launched by the Soviet Union on 4 October 1957 under the Sputnik program, with ...
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 First satellite 相關參考資料
Astérix (satellite) - Wikipedia
Astérix or A-1 is the first French satellite. It was launched on 26 November 1965 by a Diamant A rocket from the CIEES launch site at Hammaguir, Algeria. https://en.wikipedia.org Explorer 1 - Wikipedia
Explorer 1 was the first satellite launched by the United States and was part of the U.S. participation in the International Geophysical Year (IGY). https://en.wikipedia.org Satellite - Wikipedia
Planned first satellites — The first artificial satellite was Sputnik 1, launched by the Soviet Union on 4 October 1957 under the Sputnik program, with ... https://en.wikipedia.org Sputnik - NASA History Division
History changed on October 4, 1957, when the Soviet Union successfully launched Sputnik I. The world's first artificial satellite was about the size of a ... https://history.nasa.gov Sputnik 1 - Spacecraft - the NSSDCA
The Sputnik 1 spacecraft was the first artificial satellite successfully placed in ... Three of these satellites (Sputnik 1, 2, and 3) reached Earth orbit. https://nssdc.gsfc.nasa.gov Sputnik 1 - Wikipedia
Sputnik 1 was the first artificial Earth satellite. It was launched into an elliptical low Earth orbit by the USSR on 4 October 1957 as part of the Soviet ... https://en.wikipedia.org Sputnik Launched - HISTORY
The Soviet Union inaugurates the “Space Age” with its launch of Sputnik, the world's first artificial satellite, on October 4, 1957. https://www.history.com Sputnik | Satellites, History, & Facts | Britannica
Sputnik, any of a series of three artificial Earth satellites, the first of whose launch by the Soviet Union on October 4, 1957, inaugurated the space age. https://www.britannica.com Timeline of artificial satellites and space probes - Wikipedia
https://en.wikipedia.org Timeline of first artificial satellites by country - Wikipedia
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