Kepler (Moon)

Named after Johannes Kepler - German astronomer (1571-1630).

Kepler is a crater in the Eridania quadrangle on Mars. On March 25, 2006 a section of the floor was photographed by the HiRISE camera aboard the Mars Reconnaissance Orbiter. (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.