Landsteiner (Moon)

Named after Karl Landsteiner - Austrian-American pathologist; Nobel laureate (1868-1943).

Landsteiner is a tiny, bowl-shaped lunar impact crater located in the central Mare Imbrium. Nearby to the south is a low wrinkle ridge named the Dorsum Grabau. Farther south is the prominent crater Timocharis. (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.