The National Air and Space Museum holds approximately 17,000 space artifacts in its collection. More than 3,500 of those stem from the historic Apollo Moon landing effort, with 400 objects related specifically to the first successful lunar landing mission, Apollo 11. On July 20, 1969, astronauts Neil Armstrong and Buzz Aldrin landed in the Lunar Module Eagle and became the first humans to step foot on the lunar surface while astronaut Michael Collins orbited above inside the Command Module, Columbia.