Zöllner is a lunar impact crater located to the west of Sinus Asperitatis. To the north is the smaller crater Alfraganus and to the northwest lies the oval-shaped Taylor. Southeast is the smaller crater Kant. The rim forms an irregular oval, with the formation being longer in a north–south direction. (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.
