Mare Australe
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| Mare Australe | |
 Mare Australe. The basalt-flooded crater Jenner is near the middle of this photo, with Lamb just to the left. |
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| Coordinates | 38.9° S, 93.0° E |
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| Diameter | 603 km |
| Eponym | Southern Sea |
Mare Australe (the "southern sea") is a lunar mare located in the southeastern hemisphere of the Moon. It is 603 miles in diameter, overlapping the near and far sides of the Moon. Smooth, dark volcanic basalt lines the bottom of the mare. The Australe basin was formed in the Pre-Nectarian epoch, while the mare material inside formed in the Upper Imbrian epoch.
Unlike most of the lunar maria, Mare Australe has an uneven surface that is marked by a number of crater impacts. Examples of these include the Jenner and Lamb craters, which are flooded with basaltic-lava much like many of the other crater features in this mare.
The selenographic coordinates of this mare are 38.9° S, 93.0° E. The eastern half of the mare lies on the far side of the Moon, although it can be viewed in its entirety during periods of favorable libration.
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