Buys-Ballot (Moon)

Named after Christoph Hendrik Diederik Buys-Ballot - Dutch meteorologist (1817-1890).

Buys-Ballot is an oddly-shaped lunar crater on the far side. It lies just to the northwest of the small lunar mare named Lacus Luxuriae, and southeast of the crater Freundlich. Other nearby craters of note are Anderson to the southwest and Dante to the northeast. This formation has a distinctive shape for a crater, having a prominent extension to the south that nearly doubles the dimension compared to the width across the maximum west-east cross-section. (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.