A Lunar Module is a spacecraft designed for landing on the Moon and returning to a Command Module. It was used during the Apollo program, which was NASA's mission to explore the Moon in the late 1960s and early 1970s. The Lunar Module had two main parts: the descent stage for landing and the ascent stage for taking off from the Moon's surface. The Lunar Module was unique because it could operate in the Moon's thin atmosphere, which is nearly a vacuum. It was equipped with landing gear, engines, and navigation systems to ensure a safe touchdown and lift-off. The first successful manned landing using a Lunar Module occurred during the Apollo 11 mission in 1969.