Запущен первый искусственный спутник
On October 4, 1957 the USSR launched the first artificial satellite of Earth. The Soviet spacecraft "Спутник-1" was successfully launched to low Earth orbit. Start was made from Baikonur spaceport though at that time it still wasn't called so. Creation of the satellite was under the leadership of a founder of practical astronautics Sergey Korolev. Date of start of this spacecraft is considered to be the beginning of a space age of mankind, and in Russia it is celebrated as memorable day of Space troops. The satellite was developed as very simple device with two radio beacons to do trajectory measurements. The satellite flew 92 days, till January 4, 1958, having made 1440 turns round Earth (about 60 million km), and its radio transmitters worked within two weeks after start. Because of friction in an upper atmosphere the satellite lost speed, entered dense layers of atmosphere and burned down.