Birkeland (Moon)

Named after Olaf Kristian Birkeland - Norwegian physicist (1867-1917).

Birkeland is a lunar impact crater that lies in the southern hemisphere on the far side. This crater is attached to the central waist of the oddly shaped Van de Graaff crater formation, and may partly account for that crater's figure-8 shape. To the southeast is the large walled plain Leibnitz. This crater has not been significantly eroded, and the outer rim is well-defined with a well-terraced inner walls around much of the interior. (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.