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The Soviet satellite "sputnik 1" is the first object sent into space and to successfully orbit the earth.
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The fist United States satellite to orbit the earth-Explorer 1-is launched
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Russian citizen, Yuri Gagarin, is the first human in space, he orbit the earth
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Alan Shepard is the first United States citizin to go into space.
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John Glenn is the first United States citizen to orbit the earth.
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Apollo 11 crew member Neil Armstrong is the first man to walk on the moon. His fellow Aollo atronaut crew member Edwin Buzz Aldrin is right behind him, becoming the second man to walk on the moon.
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The first american space shuttle is launched. This markes the use of the first re-usable space craft.
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The space shuttle Challenger expodes shortly after take-off.
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Human habitaition in the International space station begins.
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NASA ( Nationl Aeronautics and space administration) is formed.
