Magelhaens (Moon)

Named after Fernao De (Ferdinand Magellan) Magelhaens - Portuguese explorer (1480-1521).

Magelhaens is 105 km long and was named for Ferdinand Magellan, the 16th century Portuguese explorer. It is surrounded by rocky peaks of unknown origin. These forms may be the result of tectonic movements in the Tharsis region, or of meteorite impacts. (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.