MacMillan (Moon)

Named after William Duncan MacMillan - American mathematician, astronomer (1871-1948).

MacMillan is a bowl-shaped lunar impact crater on the eastern fringes of the Mare Imbrium. It is located just to the southwest of a lone rise, near the southwestern edge of the Montes Archimedes. This is a cup-shaped depression in the surface with an interior albedo that matches the nearby lunar mare. The edges of the rim have a somewhat higher albedo. (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.