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Explorer 1 was the United States' first satellite in space
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Navy Commander Alan Bartlett Shepard Jr. is launched into space aboard 7 space capsule
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Glenn flew the Friendship 7 mission and became the first American to orbit the Earth and the fifth person in space
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Mariner 4 was the fourth in a series of spacecraft used for planetary exploration in a flyby mode and represented the first successful flyby of the planet Mars, returning the first pictures of the martian surface
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the primary objective of Apollo 11 was to complete a national goal set by President John F. Kennedy on May 25, 1961: perform a crewed lunar landing and return to Earth.
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After more than 30 years, it appears the venerable Pioneer 10 spacecraft has sent its last signal to Earth
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carrying cosmonauts Alexey Leonov and Valery Kubasov