Greaves (Moon)

Named after William Michael Herbert Greaves - British astronomer (1897-1955).

Greaves is a small lunar impact crater that lies near the southwest edge of Mare Crisium. The crater is intruding into the northern edge of the lava-flooded crater Lick. To the northwest is Yerkes, and to the northeast is Picard. (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.