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Sputnik 1 was the first artificial satellite to be put into Earth's orbit.
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Explorer 1 was the first American satalite to reach orbit, it led to the discovery of the Van Allen radiation belt
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The Luna 1 was the first man made object to orbit the sun.
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Luna 2 was the first man made object to impact the moon
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Yuri Gagarin was the first human to travel into outer space
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Alan B. Shepard was the first American to be launched into space
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Valentina Tereshkova was the first woman to be launched into space
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Ranger 7 transmitted the first close range pictures of the moon
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Alexei Leonov left his ship for 12 minutes in order to perform the first spacewalk
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Luna 9 was the first man made space craft to perform a soft landing on the moons surface
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Lunar Orbiter 1 entered the orbit around the moon and took the first picture of earth from that distance
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Apollo 8 was the first manned journey from the Earth to the moon
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Neil Armstrong and Buzz Aldrin were the first men to walk on the moon.
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Pete Conrad and Alan Bean perform the first precision lunar landing
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Apollo 17 was the last manned mission in the American Apollo Space Program
