The lunar module Eagle is shown in lunar orbit on July 20, 1969 prior to its descent to the surface of the moon. Astronaut Michael Collins took the photo above through Columbia's window. At 1:28 p.m. EDT on July 19, 1969, NASA's Apollo 11 fired its service module engine and went into orbit around the moon. A day later the lunar module Eagle, as shown, touched down in the Sea of Tranquility. Astronauts Neil Armstrong and Buzz Aldrin later spent two and a half hours walking on the moon, while their crewmate Michael Collins orbited above in the command module Columbia. The long "rod-like" protrusions under the legs are lunar surface sensing probes. Upon contact with the lunar surface, the probes sent a signal to the crew to shut down the descent engine. (UPI Photo/Michael Collins/NASA)