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Soviet Spatial Exploration Space Adrian Nikolalev Pavel Popovich S/S MNH Guinea Cats Domestic Animals Souvenir Sheet Chad Soviet Spatial Exploration SoyouzSoviet Spatial Exploration Space Adrian Nikolalev Pavel Popovich Souvenir Sheet Mint NH The Soviet space program (Russian: , Kosmicheskaya programma SSSR) comprised several of the rocket and space exploration programs conducted by the Soviet Union (USSR) from the 1930s until its collapse in 1991. Over its sixty year history, this primarily classified military program was responsible for a number of pioneering accomplishments in space flight, including