Alekhin (Moon)

Named after Nikolaj Pavlovich Alekhin - Soviet rocket designer, engineer (1913-1964).

Alekhin is a lunar crater on the southern hemisphere on the far side. It lies to the north of the crater Zeeman, and south-southeast of Fizeau. To the west lies Crommelin, and east-southeast is Doerfel. The rim has been heavily eroded by subsequent impacts to the point where the edge is little more than a curving rise in the surface. (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.