Joule (Moon)

Named after James Prescott Joule - British physicist (1818-1889).

Joule is a lunar impact crater that lies on the far side. It is located to the north-northeast of the walled plain Mach. To the northwest is the crater Blazhko. This is a worn and eroded crater formation. (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.