Sputnik 1 Launched
The Soviet Union launched Sputnik 1, the first man-made satellite.
The Soviet Union launched the first Earth satellite, Sputnik 1, on October 4, 1957, nearly three centuries after Newton had proposed his theory. Sputnik circled Earth every 96 minutes, and its simple radio signal was heard by scientists and radio operators across the world. The launching of Sputnik officially launched the "space race" between the U.S. and the USSR.
