Deslandres (Moon)

Named after Henri Alexandre Deslandres - French astrophysicist (1853-1948).

Deslandres is the heavily worn and distorted remains of a lunar impact crater. It is located to the southeast of the Mare Nubium, in the rugged southern highlands. In dimension it is the second-largest crater formation on the visible Moon, being beaten only by the 303-kilometer-diameter walled plain Bailly. The northern and eastern parts of the floor display a level surface, but it is pock-marked with numerous craters. (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.