Strömgren (Moon)

Named after Elis Strömgren - Danish astronomer (1870-1947).

Strömgren is a lunar impact crater on the far side from the Earth. It lies less than one crater diameter to the north-northeast of Von der Pahlen. Farther to the east is Gerasimovich, and to the north-northeast is Belopol'skiy. This is a worn and eroded crater formation, with several small craters along the rim edge. (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.