Sulpicius Gallus (Moon)

Named after Gaius Gallus - Roman astronomer (unkn-fl. c. B.C. 166).

Sulpicius Gallus is a small, bowl-shaped lunar crater that lies near the southwestern edge of the Mare Serenitatis. About 10 kilometers to the south and east is the Montes Haemus range that forms the edge of the Serenitatis basin. This crater has a high albedo, with a sharp-edged rim that displays little appearance of wear. There is a small rise at the midpoint. (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.