Mare Cognitum (the "sea that has become known") is a lunar mare located in a basin or large crater which sits in the second ring of the Procellarum basin. The basin material is of the Lower Imbrianepoch, while the basaltic mare material is of the Upper Imbrian epoch. To the northwest of the mare is the Montes Riphaeus mountain range, part of the rim of the buried crater or basin containing the mare.
MareCognitum (the "sea that has become known") is a lunar mare located in a basin or large crater which sits in the second ring of the Procellarum basin.
The basin material is of the Lower Imbrian epoch, while the basalticmare material is of the Upper Imbrian epoch.
To the northwest of the mare is the Montes Riphaeus mountain range, part of the rim of the buried crater or basin containing the mare.
Mare Australe (the "southern sea") is a lunar mare located in the southeastern hemisphere of the Moon.
The Australe basin was formed in the Pre-Nectarian epoch, while the mare material inside formed in the Upper Imbrian epoch.
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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