Apollo Lunar Module LM-2
Grumman Aerospace Corporation · 1968
Standing on four spidery legs in the Milestones hall, wrapped in gold and black foil and bristling with antennas, is a lunar module exactly like the Eagle that landed Armstrong and Aldrin on the Moon. It is not the Eagle; every module that reached the Moon was left there or burned up. This is LM-2, the second one built, which was meant for an unmanned test flight in Earth orbit in 1968 and never flew because the first test went so well. Instead it was used for ground tests, then dressed to look like the Apollo 11 lander and given to the Smithsonian.
The lunar module was the first true spacecraft, designed to fly only in vacuum and never to return to Earth, so its builders at Grumman could ignore aerodynamics entirely. That is why it looks so strange: an angular cabin with two triangular windows, a descent stage below it carrying the landing engine and fuel, and the four legs with dish shaped pads. Look for the ladder on the front leg, down which Armstrong climbed, and the crinkled foil, which is thermal insulation rather than skin; the walls of the cabin behind it are in places thinner than a coin. The ascent stage on top was the crew's lifeboat, with its own engine to lift them back to the command module.
LM-2's ascent stage went to the Expo 70 world fair in Osaka before the whole module came to the Smithsonian in 1971. It stood in the museum's original Lunar Exploration Vehicles gallery from 1976 and was moved to the Milestones hall in 2016, where it returned when the hall reopened in July 2025. The base of the display is built to look like the surface of the Sea of Tranquillity. It is the most complete lunar module on Earth, and the only one that could, in theory, still have flown.
Did You Know? The cabin walls of the lunar module are so thin that a dropped screwdriver could have punctured them, which is why the astronauts wore their boots with care.
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