C. Herschel (Moon)

Named after Caroline Lucretia Herschel - British astronomer (1750-1848).

C. Herschel is a small lunar crater that lies on the western part of Mare Imbrium. It is a circular, bowl-shaped formation that has not undergone significant erosion. The interior floor has the same low albedo as the surrounding lunar mare. To the south-southwest is the similar crater Heis. (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.