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Mare Frigoris

Sea of Cold, Mare on the Moon

A narrow lunar sea that runs from west to east across the northern polar regions of the Moon, at least on the face visible from Earth. Its surface area of about 440,000 km2 makes it comparable with the Black Sea or the Red Sea on Earth. The lunar Alps run along its southern edge, separating it from the Mare Imbrium beyond, though a long narrow cleft, the Vallis Alpes, runs through the mountains between the two seas. The most prominent crater in the Sea of Cold, and indeed the only crater of appreciable size, is the terrace-walled Aristoteles near the sea's eastern end.


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