Apollo SpaceCraft (Lunar Module (LEM)

The Lunar Module (LM) - originally called the Lunar Excursion Module (LEM) and still pronounced "lem" after the name was changed - was the spacecraft that allowed the Apollo astronauts to land on the Moon.
Built by Grumman Aerospace on Long Island, N.Y., the spacecraft had two major parts: the descent stage and the ascent stage, which were carried to lunar orbit by the companion Command Service Module (CSM), a separate spacecraft of approximately twice the mass of the LM that carried the astronauts to and from Earth.