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Question

In which year was Sputnik 1 launched?

A
1957
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B
1975
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C
1950
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D
1948
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Solution

The correct option is A 1957
Sputnik 1 was the first artificial Earth satellite. The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957. It was a 58 cm diameter polished metal sphere, with four external radio antennae to broadcast radio pulses.

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