Seidel (Moon)

Named after Philipp Ludwig von Seidel - German astronomer, mathematician (1821-1896).

Seidel is a worn lunar impact crater that lies to the east-northeast of the much larger crater Jules Verne. Farther to the east is the western edge of Mare Ingenii, and to the northeast lies the crater O'Day. This is an eroded crater with a small crater overlying the south-southeastern outer rim. The southern rim is overlain by material deposits, most likely ejecta from another impact. (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.