Vlacq (Moon)

Named after Adriaan Vlacq - Dutch mathematician (c. 1600-1667).

Vlacq is a prominent lunar impact crater that is located in the southeastern part , and appears foreshortened when viewed from the Earth. This crater is adjacent to the northeastern rim of the larger Hommel, and to the northwest rim of Rosenberger. This crater has become eroded, but not to the degree of the larger neighboring craters. The satellite crater Vlacq G intrudes into the southern rim , and is overlaid in turn along the southwest rim by the sharp-rimmed Vlacq B. (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.