60 Years Sputnik One - Space Documentary (Euronews)

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Sputnik 1 was the first artificial Earth satellite. The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957. It was a 58 cm diameter polished metal sphere, with four external radio antennas to broadcast radio pulses. Its radio signal was easily detectable even by amateurs, and the 65° inclination and duration of its orbit made its flight path cover virtually the entire inhabited Earth.

Credit: ESA

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