oct 4, 1957 - Sputnik Enters Orbit
Description:
At 7:28 PM, the first man-made satellite broke free of the Earth's gravity. Due to its Russian Origin, Sputnik was regarded as a threat to the United States, despite the fact it only contained radio transmitters and batteries to last three weeks.
Added to timeline:
History of Space Travel
Date:
Images:
![]()
