Vertregt (Moon)

Named after Marinus Vertregt - Dutch chemist (1897-1973).

Vertregt is the ancient remnant of a large lunar impact crater. It is located on the far side , to the north of the unusual walled plain Van de Graaff. The prominent crater Aitken lies across the northeast rim , and Zwicky is attached to the northwestern rim. Vertregt has been heavily eroded and reshaped by subsequent events, leaving only a few segments of the outer rim still visible. (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.