Boscovich is a lunar crater that has been almost completely eroded away by subsequent impacts. The crater floor has a low albedo, and the dark hue makes it easy to recognize. The surface is crossed by the rille system designated Rimae Boscovich that extends for a diameter of 40 kilometres. (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.
