Shadow of the Apollo 11 Lunar module silhouetted against Moon's surface

AS11-37-5505 (20 July 1969) --- This photograph shows in fine detail the impressions in the lunar soil made by astronauts Neil A. Armstrong and Edwin E. Aldrin Jr. during their lunar surface extravehicular activity (EVA). While astronauts Armstrong, commander, and Aldrin, lunar module pilot, descended in the Lunar Module (LM) "Eagle" to explore the Sea of Tranquility region of the moon, astronaut Michael Collins, command module pilot, remained with the Command and Service Modules (CSM) "Columbia" in lunar orbit.