Warner (Moon)

Named after Worcester Reed Warner - American inventor (1846-1929).

Warner is a lunar crater that is located in the southern part of the Mare Smythii, near the eastern limb. In this location the crater is viewed almost from the edge from Earth, and is sometimes hidden from sight due to libration. The crater lies just to the south-southeast of the very similar Runge. To the southwest is Widmannstätten, and to the south is the merged Kao–Helmert crater pair. (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.