Le Verrier is a small lunar impact crater located in the northern part of the Mare Imbrium. To the west is the slightly larger crater Helicon, and farther to the west-northwest lies the mountain-ringed bay Sinus Iridum. Le Verrier, sometimes written Leverrier, is a bowl-shaped feature with a nearly circular rim. The inner walls display the appearance of slumping along the upper edges. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.