Sea Of Moisture, Sea Of Rock.

The Mare Humorum lies on the lunar terminator, the ancient rugged surface is thrown into high relief by the low sun of the lunar morning. 

At just over 68 miles across, the great impact scar of Gassendi is prominent amongst the ring of craters surrounding this ancient lunar sea to the north, whilst some 240 miles distant, the smaller rim of Doppelmayer just visible on its southern escarpment.