How Sputnik Changed the World 55 Years Ago Today

Sputnik was the world's first artificial satellite, launched Oct. 4, 1957.
(Image credit: NASA)

Fifty-five years ago today, the Space Race was kicked into gear by a silver basketball flying through the sky.

Sputnik 1, the Soviet probe that became the first manmade object to reach space, launched Oct. 4, 1957. The feat proved the Soviet Union's technological bonafidesand spurred the United States into stepping up its game in space.

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Clara Moskowitz
Clara has a bachelor's degree in astronomy and physics from Wesleyan University, and a graduate certificate in science writing from the University of California, Santa Cruz. She has written for both Space.com and Live Science.