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Colleen Hartman, director of physics, aeronautics, and space science at the National Academies of Science gives closing remarks during an event celebrating the 50th anniversary of the Apollo 17 mission, Wednesday, Dec. 14, 2022, at the National Academies of Science in Washington. The three-astronaut crew of Apollo 17 - commander Eugene Cernan, lunar module pilot Harrison Schmitt, and command module pilot Ronald Evans, embarked on the last mission of the Apollo program to land humans on the Moon in December of 1972. Cernan and Schmitt spent three days on the lunar surface collecting samples an…
