Heis (Moon)

Named after Eduard Heis - German astronomer (1806-1877).

Heis is a small lunar impact crater that is located in the western part of the Mare Imbrium. This is a circular, symmetrical formation with an interior floor that is about half the diameter of the outer rim. The tiny satellite crater Heis A intrudes slightly into the northern rim. (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.