Steklov (Moon)

Named after Vladimir Andreevich Steklov - Soviet mathematician (1864-1926).

Steklov is a lunar crater on the far side , past the southwestern limb. It lies in the outer skirt of ejecta from the Mare Orientale impact basin, just to the southwest of the Montes Cordillera ring of mountains. About four crater diameters to the southwest is the slightly smaller crater Chant. The rim of this crater has a sharp edge that has not been eroded by impacts. (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.