Sputnik 1

Sputnik 1   The  Soviet Union  launched it into an elliptical  low Earth orbit  on 4 October 1957, orbiting for three weeks before its bat...

Sputnik 1 The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957, orbiting for three weeks before its batteries died, then silently for two more months before falling back into the atmosphere. 

Sputnik 1 diagram