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the German pioneer of human aviation Otto Lilienthal also studied heavier-than-air flight
Newton used his mathematical description of gravity to prove Kepler's laws of planetary motion
Physicists generally are interested in the root or ultimate causes of phenomena
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Soviet Spatial Exploration Voskhod 1 Astronaut Imp. Sov. Sheet of 5 MNH Hindenburg the German pioneer of humanChad Soviet Spatial Exploration Voskhod 1 Astronaut Imp. Sov. Sheet of 5 MNH 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 the first
