Mandel'shtam (Moon)

Named after Leonid Isaakovich Mandel'shtam - Soviet physicist (1879-1944).

Mandel'shtam is the remains of a large crater. Nearly attached to the northeast outer rim is the crater Papaleksi. To the south lies the crater Vening Meinesz. The outer rim of this crater has been battered into near ruin, with sections forming only an irregular circular 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.