Wednesday December 11, 2024

Mare Humorum (all night)

Mare Humorum, the small, round dark patch in the moon's southwestern quadrant, is a basin formed during the moon's Nectarian Period approximately 3.9 million years ago. Views in a telescope on the nights before full moon will show arcuate wrinkle ridges near the eastern rim of the lava-flooded sector, the parallel curves of Rimae Hippalus outside the eastern border, and the prominent Rupes Liebig and Rimae Doppelmayer on the western rim. A darker region of the basin floor along the southwestern edge is composed of volcanic glasses and ash deposits. On the basin's northern rim lies the large floor fractured crater Gassendi.

(Data courtesy of Starry Night)
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