Sputnik
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On October 4, 1957, The Soviet Union put the first artificial satellite,
Sputnik I, into an orbit of the Earth and ushered the modern space age.
It circled the globe every 96 minutes at a speed of 18,000 miles per hour
for 92 days until January 4, 1958, when it re-entered in the atmosphere
and burned up. A month later on Novenber 3, 1957, the Soviet Union launched
Sputnik II, the first satellite put into orbit with an animal on board,
the dog Laika. She died after one week, because the oxygen supply ran out.
The satellite burned in the atmosphere after 162 days.
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