What name did Apollo 11 astronauts give their lunar landing site?

Apollo 11 astronauts Neil Armstrong and Buzz Aldrin named their lunar landing site Tranquility Base.

The Apollo 11 Lunar Module Eagle touched down on July 20, 1969, in the southwestern part of Mare Tranquillitatis, the Moon’s Sea of Tranquility. Armstrong announced the name moments after landing with the famous call, “Houston, Tranquility Base here. The Eagle has landed.”

Armstrong and Aldrin had chosen the name shortly before the mission and told only capsule communicator Charles Duke, so he would recognize it during the landing. The phrase referred to the landing site as a base, although Apollo 11 left no permanent lunar settlement there.

Taurus Base and Hadley Base are not Apollo 11 names. Hadley is associated with Apollo 15’s landing region, while Fra Mauro was the target area for Apollo 13 and later Apollo 14. The site’s official Latin designation is Statio Tranquillitatis, and it remains the location of humanity’s first crewed landing on another world.