Sputnik
Explorer 1
Apollo 1
Vostok 1
4
5
6
7
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Alan Shepard
Nikita Khrushchev
Neil Armstrong
Yuri Gagarin
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True
False
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Voyager 1
Voyager 2
Pioneer 10
Pioneer 11
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Buzz Aldrin
John Glenn
Neil Armstrong
Michael Collins
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Mariner 9
Pioneer 10
Viking 1
Mars Science Rover
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True
False
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2
3
4
5
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1963
1973
1983
1993
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