Alhazen (Moon)

Named after Abū Ali Al-Hasan Ibn Al Haitham Alhazen - Iraqi mathematician (987-1038).

Alhazen is a lunar impact crater that lies near the eastern limb 's near side. Just to the south-southeast is the crater Hansen, and to the west is the Mare Crisium. The rim is nearly circular, but appears highly oblong when viewed from the Earth due to foreshortening. The inner walls and the crater floor are rugged and irregular. (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.