Langemak (Moon)

Named after Georgij Erikhovich Langemak - Soviet rocketry scientist (1898-1938).

Langemak is a prominent impact crater on the far side. It is located less than one crater diameter west-northwest of Danjon, and nearly due east of Meitner. To the southwest is Kondratyuk. Langemak partly overlies the larger and older crater Langemak N. This feature is also attached to the northeastern rim of Kondratyuk. (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.