365 Days of the Moon -- August 12, 2014
Here is another of the far western lunar limb views I took during Saturday's “Supermoon”. In the upper half of this view along the
northwest limb of the Moon we see three large overlapping lava-flooded craters. The foreground crater with the most prominent rim is
Eddington, 80 miles in diameter, with its interior flooded by lavas that flowed in from Oceanus Procellarum well over two billion
years ago. Behind Eddington's western rim lies even larger Struve, spanning 103 miles and even more ruined by lava fill than Eddington.
To the north of Stuve, 62-mile diameter Russel partially merges with Struve where lavas overran the depressed rims of the overlapped
craters. No central peaks protrude from the basalts within each of these craters, showing that the craters must be lava flooded to a
depth of at least a kilometer. I have always heard Procellarum basalts are relatively shallow. These flooded craters on the western shore
of Precellarum tell me Procellarum may be much deeper than thought.
Image taken with a Celestron 11 Edge HD, 2.5X Powermate, and Skyris 274M
Image copyright Robert Reeves 2014
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