Messala (Moon)

Named after (Ma-Sa-Allah) Messala - Jewish astronomer (unkn- c. 815).

Messala is a lunar crater of sufficient dimension to belong to the category of impact features known as walled plains. It is located in the northeastern part , close enough to the rim to appear significantly foreshortened. Nearly attached to the northern rim is the crater Schumacher. To the southwest is the prominent crater Geminus, and due south is the smaller Bernoulli. (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.