Tsiolkovskiy (Moon)

Named after Konstantin E. Tsiolkovskiy - Soviet physicist (1857-1935).

Tsiolkovskiy is a large lunar impact crater on the far side. Just to the south is Waterman, with Neujmin to the south-southwest. The crater protrudes into the neighbouring Fermi, an older crater of comparable size that does not have a lava-flooded floor. (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.