Heinsius (Moon)

Named after Gottfried Heinsius - German astronomer (1709-1769).

Heinsius is an eroded lunar crater that lies in the southwestern part. It is located to the northwest of the prominent crater Tycho, and rays from that formation pass to the north and south as well as marking the rim and interior with material. To the south-southwest is the larger walled plain Wilhelm. The southern part of this crater has been heavily damaged by subsequent impacts. (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.