Mädler (Moon)
Named after Johann Heinrich Mädler - German astronomer (1794-1874).
Mädler is a crater on Mars named in honor of the German astronomer Johann Heinrich Mädler. (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.
Mädler
-11.04° N 29.76° E