noun
Sputnik is a noun referring to the first artificial satellite launched into space by the Soviet Union in 1957.
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The launch of Sputnik marked the beginning of the space race between the United States and the Soviet Union.
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Did you know that Sputnik was the first artificial satellite to orbit the Earth?
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I heard that Sputnik was a game-changer in the field of space exploration.
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The success of Sputnik inspired a new wave of innovation and competition in the scientific community.