Zach (Moon)

Named after Franz Xaver, Freiherr von Zach - Hungarian astronomer (1754-1832).

Zach is a lunar impact crater located in the heavily cratered southern sector. To the north is the crater Lilius, while to the southeast is Pentland and to the south the larger Curtius. Due to foreshortening, the crater has an oblong appearance when viewed from Earth. The crater is 71 kilometers in diameter and 3.7 kilometers deep. (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.