Nobel is a crater that lies on the far side. It is located in the northern edge of the vast skirt of ejecta surrounding the Mare Orientale impact basin. Less than three crater diameters to the south is the larger crater Elvey, and to the west-southwest is the smaller Pease. This is a circular, bowl-shaped crater with a worn outer rim. (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.