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On April 12, 1961, the USSR opened the era of manned spaceflight, with the flight of the first cosmonaut (Russian name for space travelers), Yuri Gagarin. Gagarin's flight, part of the Soviet Vostok space exploration program, took 108 minutes and consisted of a single orbit of the Earth.
In the center of the disc the indication of the denomination of the coin 10 RUBLES. Inside of the figure "0" – hidden pictures of the figure 10 and of the inscription RUB visible by turns on changing angle of vision. Along the rim circular inscriptions, on top BANK OF RUSSIA, on bottom the mint trade mark (SPMD) and the date 2011, to the left the stylized image of a laurel branch, to the right of the oak one.
In the centre disc against the background of celestial sky the image of a starting space rocket, to the left the picture of a planet, the circular inscription: '50th Anniversary of the First Manned Spaceflight', located on the wide stripe along the rim.
50 ЛЕТ ПЕРВОГО ПОЛЕТА ЧЕЛОВЕКА В КОСМОС
6 sections with 5 corrugations and 6 sections with 7 corrugations alternated with 12 smooth sections.