Papaleksi (Moon)

Named after Nikolaj Dmitrievich Papaleksi - Soviet physicist (1880-1947).

Papaleksi is an impact crater on the far side. It lies along the northeastern outskirts of the large crater Mandel'shtam. About 20 km to the north-northeast is the similar crater Spencer Jones. This is a roughly circular crater with an eroded outer rim that has lost much of its original sharp definition. (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.