what was its mission?
It was 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.
Sputnik 1
 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. 
what happened to hungary during the cold war failure of the uprising in Hungary as evidence that the Cold War in Europe had become a stalemate. what is a precursor to hungarian revolution? Both Hungarian and German forces stationed in Hungary were subsequently defeated when the Soviet Union invaded the country in late 1944. what happened during the postwar situation? The Soviet Army occupied Hungary, with the country coming under the Soviet Union's sphere of influence. what is the space initiative of this latter mentioned country of influence? They constructed the first satellite - Sputnik 1, The first cosmonaut Yuri Gagarin was sent to the space when did this first satellite construction start? Somewhere in 1956 or 1957 who/what was responsible for its fabrication? Mikhail S. Khomyakov, Antenna Laboratory of OKB-1
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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.