Maskelyne (crater)
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Maskelyne is a solitary lunar impact crater that lies in the southeast part of the Mare Tranquillitatis. Its diameter is 22 km. It was named after British astronomer Nevil Maskelyne. The outer rim has a somewhat polygonal shape, although it is generally circular. The inner walls are terraced and there is a low central rise at the midpoint of the floor.
Apollo 10 Hasselblad Camera image
Oblique view of Maskelyne from Apollo 10
Oblique view facing west from Apollo 11, showing Maskelyne at center, with Maskelyne B above center, Maskelyne G near top center, Maskelyne X and Y in upper left, and Maskelyne K at right.
Apollo 15 image of Maskelyne F
Mare Tranquillitatis
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Mare Tranquillitatis is a lunar mare that sits within the Tranquillitatis basin on the Moon. It is the first location on another celestial body to be visited by humans.
The Sea of Tranquility of the Moon
A view of the Apollo 11 landing site at center, facing west, with Maskelyne crater in right foreground
The Moon with Mare Tranquillitatis highlighted and the first crewed lunar landing marked.
Buzz Aldrin salutes the U.S. flag on Mare Tranquillitatis during Apollo 11 in 1969.