Shackleton (Moon)

Named after Sir Ernest Henry Shackleton - Irish-born British Antarctic explorer (1874-1922).

Shackleton is an impact crater that lies at the south pole. The low-temperature interior of this crater functions as a cold trap that may capture and freeze volatiles shed during comet impacts. Measurements by the Lunar Prospector spacecraft showed higher than normal amounts of hydrogen within the crater, which may indicate the presence of water ice. (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.