Röntgen (Moon)

Named after Wilhelm Conrad Röntgen - German physicist; Nobel laureate (1845-1923).

Röntgen is a large lunar impact crater that lies along the northwestern limb. Its northwestern outer rim is partly overlain by the crater Nernst. Both Nernst and Röntgen overlie the eastern rim of the much larger walled plain Lorentz. The smaller crater Aston is separated from the eastern edge by only a few kilometers of terrain. (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.