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1
Buzz Aldrin
As the second person to walk on the Moon, Buzz Aldrin played a vital role in the Apollo 11 mission and subsequent lunar exploration. He conducted scientific experiments on the lunar surface, collectin...
2
Fred Haise
Fred Haise, as Lunar Module Pilot on Apollo 13, played a critical role in the mission's successful return to Earth after an oxygen tank explosion. His engineering expertise and quick thinking were ess...
7.9
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3
Sergei Krikalev
Sergei Krikalev is often referred to as the 'last citizen of the USSR' because he was in space aboard the Mir station when the Soviet Union collapsed. A veteran of six spaceflights, he has spent over...
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