Nunn (Moon)

Named after Joseph Nunn - American engineer (1905-1968).

Nunn is a lunar impact crater that is located just beyond the eastern limb , along the northern edge of Mare Smythii. To the east of this crater is the much larger Babcock, and to the northwest is Jansky. This is a circular, bowl-shaped crater with some impact wear along the northwestern rim and to a lesser degree along the southeastern edge. The remainder of the crater perimeter is free of erosion, and the edge is well-defined. (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.