oct 4, 1957 - the first satellite,sputnik, is launched into space
Description:
when the Soviet Union successfully launched Sputnik I. The world's first artificial satellite was about the size of a beach ball (58 cm.or 22.8 inches in diameter), weighed only 83.6 kg. or 183.9 pounds, and took about 98 minutes to orbit the Earth on its elliptical path.
Added to timeline:
space exploration timeline
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