Sputnik had an elliptical orbit. At it farthest distance from the surface of Earth it was 583 miles. At the nearest to the surface it was 134 miles.
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Sputnik 1, the first man made object to orbit the earth. And we've been polluting like crazy up there ever since.
It was launched into an elliptical low earth orbit.
Sputnik was a series of satellites built and launched by the then Soviet union. Sputnik 1 and 2 became the first two man made objects to attain orbit around the Earth.
Remote sensing.
Sputnik was a family name for a series of satellites, most of which burned up during reentry after some time in orbit.