The Moon from Earth - Northern Lunar Pole, Seas of Cold, Serenity, and Tranquility

The smooth patch of mare in shadow just below the Northern Pole is the Alpine Valley, which leads eastward (right) into the highest-latitude region of lunar basalts, the Sea of Cold. Just to the south, two large craters, Aristotle (top) and Eudoxus, blemish the landscape vertically . To their west, (left) the Alps Mountains follow downward along the day-night line, or terminator.

Moving southward along the terminator leads to the Caucasus Mountains that border the upper rim of the Sea of Serenity. The range casts long shadows westward into the the Sea of Rains, which is almost entirely in shadow.

Continuing down along the terminator, the Aristillus and Autolycus craters are in half-shadow. Just below them, the Apennine Mountains emerge from the terminator and border the western edge of the Sea of Serinity.
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