A huge impact crater seen in the south spans a tremendous 450 kilometers and appears superposed on an older crater of similar size.
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This is going to sadden many of you, And I expect that.
Richard Hoagland has some good stuff on this moon. There are a LOT of mysterious, seemingly impossible features on this body. Check out http://www.enterprisemission.com/moon1.htm
I know, I know... Richard Hoagland. I happen to appreciate his style and his findings.