Gay-Lussac (Moon)

Named after Joseph Louis Gay-Lussac - French physicist (1778-1850).

Gay-Lussac is a lunar crater located to the north of the prominent crater Copernicus, in the southern foothills of the Montes Carpatus range. The rim of the crater is slightly distorted, although generally circular. The inner floor is flat but rough, with no central peak. There are a pair of small craterlet depressions in the middle instead of a central peak. (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.