Moments of Wonder: Enceladus and Dione


NASA's shot of Enceladus and Dione

NASA’s Cassini-Huygens mission to Saturn continues to amaze. Check out this shot of its contrasting moons, Enceladus and Dione.

The surface of the brighter, smaller Enceladus receives a constant rain of ice grains from its south polar jets. Its surface, therefore, is white like fallen snow, while  bright, Dione’s older surface appears to have darkened as it gathered dust and radiation damage in a process scientists call “space weathering.”

Sixty-two moons orbit Saturn. Only 53 of them are named.

Check out out NASA’s Cassini page for more information on the mission and a bevy of breathtaking photos.