Smithsonian National Air & Space Museum

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10. Space Predictions Through 2040

First American to orbit the Earth

Feb 20, 1962

The Mercury spacecraft in which astronaut John H. Glenn Jr. became the first American to orbit the Earth. On February 20, 1962, Glenn circled the Earth three times. The space flight lasted 4 hours ...

First successful United States satellite

Jan 31, 1958

Explorer 1 became America's first satellite on January 31, 1958. Following the Soviet success with Sputnik and the embarrassing failure in December 1957 of the first American attempt to launch a sa...