Named after Jean Picard - French astronomer (1620-1682).
Picard is a lunar impact crater that lies in Mare Crisium. It is the biggest non-flooded crater of this mare, being slightly larger than Peirce to the north-northwest. To the west is the almost completely flooded crater Yerkes. To east is the tiny Curtis. (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.
