New Theory About Saturn's Sixth-largest Moon.

"An enormous plume of dust and water spurts violently into space from the south pole of Enceladus, Saturn's sixth-largest moon".
This is what Scientists has observed of Enceladus from the images that the spacecraft Cassini has provided. This phenomenon has greatly intrigued the scientists. The "erupting plume" on Enceladus is ejected by eruptions from deep, tiger-stripe cracks within the moon's south pole. Some astronomers have suggested that the myriad tiny grains of dust from these eruptions could be the actual source of Saturn's E-ring. However, the dynamics and the origin of the plume itself have remained a mystery. Why, the scientists ask, are these particles injected into space?
It's kind of complicated, but basically, when the points of temperature and vapor pressure that have drastically dropped, it causes the mixture to form a dust-like consistency. An equilibrium with this dust and solid ice within the moon's crust causes the water vapor to rapidly erupt, carrying the dust particles with it.
This discovery is significant because the discovery of the factors behind the dust explosions has led scientists to discover that liquid water exists on Saturn's moon. Liquid water is a prereq. for life. Soooo... there may not be Martians, but how about Spartians???

http://www.astronomy.com/asy/default.aspx?c=a&id=6661