Sitting atop the Saturn V launch vehicle, with its engines and fuel tanks, was the spacecraft lunar module adapter (SLA), whose job was to protect the lunar module (LM) from the heat and stress of ripping through the Earth's atmosphere at high velocity. The LM was the only part of the Apollo spacecraft to touch down on the moon. The service module (SM) included batteries, engines, fuel cells and oxygen tanks. The command module (CM) was located above the SM and served as the living quarters for the astronauts during most of the mission. Control and display panels were located there. The launch escape system (LES) was on top of the CM and provided the astronauts with an emergency exit.
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