The Great Eastern Chain of the Moon showing a conspicuous chain of large craters, at one time referred to as the Great Western Chain, which closely hugs the same meridian near the eastern limb (i.e., the rim of the visible disk) of the Moon. They start on the southeastern shore of the Sea of Fertility and continue south. The chain consists of Langrenus, Vendelinus, Petavius, and Furnerius as seen in this picture on the top from the left to the right. On the left hand side is the Mare Crisium, a huge lunar mare located in the Moon's Crisium basin. This close up shot was taken during the moon's waning gibbous phase yesterday night from my place.