Enceladus is the sixth-largest moon of Saturn. It has the highest albedo of any known object in the Solar System, reflecting almost 100% of the sunlight Eceladus receives.

Cryovolcanoes

Cryovolcanoes at the south pole shoot large jets of water vapor into space. The whole of Saturn's E Ring is believed to have been made from these ice particles.

Water

Enceladus seems to have liquid water under its icy surface. This could be caused by internal heat as a result of tidal forces from Saturn.

Life

Because of the apparent liquid water near the surface, Enceladus may be one of the best spots for humans to look for extraterrestrial life.