de Gerlache (Moon)

Named after Adrien Gerlache - Belgian Antarctic explorer (1866-1934).

De Gerlache is a lunar crater that is located along the southern limb , within a crater diameter of Shackleton at the south pole. From the Earth this crater is seen from the edge, and it lies in perpetual darkness. Thus little or no detail can be seen of this crater, other than the edge of the rim. However, the crater is clearly visible in Earth-based radar images. (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.