Yablochkov (Moon)

Named after Pavel Nikoaevich Yablochkov - Russian electrical engineer (1847-1894).

Yablochkov is a ruined lunar crater on the northern hemisphere 's far side. It lies almost due south of the large walled plain Schwarzschild. Both the rim and interior of this feature have been heavily damaged by subsequent impacts, leaving a formation that is little more than a rugged depression in the surface. The most notable of the overlying impacts is Yablochkov U across the northwest rim. (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.