Backlund (Moon)

Named after Jöns Oskar Backlund - Russian astronomer (1846-1916).

Backlund is a worn lunar crater that lies on the far side , beyond the eastern limb. It lies astride the southern rim of the walled plain Pasteur, to the west of the crater Hilbert. Further to the west-southwest is Sklodowska. The north and south ends are more worn and eroded than the intervening stretches. (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.