who launched the first man made satellite and when
The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957.
Sputnik 1
The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957.
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Sputnik 1 [SEP] Introduction
Sputnik 1 (; "Satellite-1", or "PS-1", Простейший Спутник-1 or "Prosteyshiy Sputnik-1", "Elementary Satellite 1") was the first artificial Earth satellite. The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957. It orbited for three weeks before its batteries died and then orbited silently for two months before it fell back into the atmosphere. It was a polished metal sphere 58 cm (23 in) in diameter with four external radio antennas to broadcast radio pulses. Its radio signal was easily detectable by radio amateurs, and the 65° inclination and duration of its orbit made its flight path cover virtually the entire inhabited Earth.