They were numbered 1 to 5, going from east to west.

They ranged between 45 degrees east and west, and 5 degrees north and south of the center of the Moon's facing side. Based on high-resolution photographs taken by the Lunar Orbiter spacecraft, and photos and data taken by the uncrewed Surveyor landers, this list was narrowed down to five sites located near the lunar equator. National Park Service, and UNESCO have declined to do so, due to the technicality that it is not located within their borders.įor more than two years, NASA planners considered a collection of 30 potential sites for the first crewed landing. states of California and New Mexico have registered Tranquility Base as a heritage site associated with them, but Texas, the U.S. It is located in the south-western corner of the dark lunar plain Mare Tranquillitatis ('Sea of Tranquility'). Tranquility Base was named by Aldrin and Armstrong, and first announced by Armstrong when the Lunar Module Eagle landed. They lifted off the surface on July 21 at 17:54 UTC. The astronauts spent two hours and 31 minutes examining and photographing the lunar surface, setting up several scientific experiment packages, and collecting 47.5 pounds (21.5 kg) of dirt and rock samples for return to Earth. Armstrong exited the spacecraft six hours and 39 minutes after touchdown, followed 19 minutes later by Aldrin.

On July 20, 1969, Apollo 11 crewmembers Neil Armstrong and Buzz Aldrin landed their Apollo Lunar Module Eagle at approximately 20:17:40 UTC.

Tranquility Base ( Latin: Statio Tranquillitatis) is the site on the Moon where, in July 1969, humans landed and walked on a celestial body other than Earth for the first time.

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