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 which was the first artificial satellite launched by  which country ?

Sputnik 1 was the first artificial satellite launched on October 4, 1957 by USSR (now Russia).

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Sputnik 1 the first natural satellite ,was launched on October 4, 1957 by USSR(Russia)

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Sputnik 1 was the first artificial Earth satellite. It was a 585 mm (23 in) diameter shiny metal sphere, with four external radio antennae to broadcast radio pulses. The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957

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