| Feature on | The Moon | | Feature type | Mare (Lunar sea) | | Quadrangles | Primarily LQ-21, but extending into LQ-12, LQ-13 and LQ-20 | | Lunar coordinates | 4° S - 19° N, 17 - 45° E | | Dimensions | Diameter 876km; area c.602,000 sq km | | Bounding features | Mare Fecunditatis, Mare Serenitatis | | Interior features | Aldrin, Arago, Ariadeus, Armstrong, Cajal, Caudry, Collins, Dawes, Dionysius, Jansen, Maclear, Manners, Maskelyne, Moltke, Plinius, Ritter, Ross, Sabine, Sinas | | Notes | One of several prominent seas in the northeastern quadrant of the Moon's face as seen from Earth, Mare Tranquillitatis or the Sea of Tranquility lies southeastward of Mare Serenitatis (the Sea of Serenity) and southwestward of Mare Crisium (the Sea of Crises on the Moon's eastern limb). |
A vast grey plain in the northern hemisphere of the Moon. It is most famous as the site
of the first manned landing on the Moon, near its southern 'shores' at a point now known
as Statio Tranquillitatis (Tranquility Base).
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