This mission conducted the first manned landing on a celestial body other than earth, touching down on the surface of the moon on 20 July 1969. Apollo 11 entered lunar orbit on 19 July, 75 hours 50 minutes into the mission. At 101 hours 12 minutes, Aldrin and Armstrong in LM-5 (Eagle) separated from CSM-107 (Columbia) to make their descent to the lunar surface, where they landed in the Sea of Tranquility (0" 4'15" N lat  23" 26' E long) at 102 hours 45 minutes into the mission. Neil Armstrong became the first human being to set foot on the moon at 109 hours 42 minutes, and was followed by Aldrin 20 minutes later. The total elapsed time spent by the two men outside the spacecraft during EVA was 2 hours 30 minutes, ending at 111 hours 39 minutes. They both walked about 300 feet from the LM, gathered 44 pounds of rock samples and conducted other scientific evaluations. At 124 hours 22 minutes, the Eagle's ascent stage was fired and Eagle re-docked with Columbia at 128 hours 3 minutes. The LM was separated from the CSM, which returned to earth and splashed down in the Pacific at 195 hours 18 minutes.