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In early space programs, such as the Apollo missions of the 1960s and 1970s, and in the Space Shuttle missions today, scientists developed objects for the astronauts to use on the moon and in space.
2017年12月四级真题（第二套）听力 Section C
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Moreover, some of the objects on the moon are still being used including a laser range reflector left by the Apollo 11 crew.
2018年12月四级真题（第二套）听力 Section C
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Much of it was left by American astronauts who landed on the lunar surface between 1969 and 1972 during NASA's Apollo missions.
2018年12月四级真题（第二套）听力 Section C