Klein (Moon)

Named after Hermann Joseph Klein - German astronomer (1844-1914).

Klein is a lunar impact crater that is located across the western rim of the larger crater Albategnius, in the central highlands region. There are low saddles in both the northern and southern parts of the rim, and the crater Klein A cuts through the northeast rim. The floor has been covered and smoothed by a lava flow, and there is a small central peak. (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.