Scientists discovered the watery plumes spewing from Saturn's moon Enceladus are sprinkling the planet's rings with sodium salts. The finding adds more weight to the belief that there may be a liquid ocean underneath the moon's thick ice layer. More info at National Geographic.
Many astronomers think the geysers created and continue to feed the so-called E ring, Saturn's outermost ring.
New data from Cassini offer evidence of sodium salts in the icy particles of the E ring, which suggests the salts came from Enceladus's plumes.
"It's really hard to explain [salt in the E ring], other than [the theory] that there is a saltwater reservoir feeding the plumes. That's by far the most plausible explanation," said study co-author Frank Postberg, of the Max Planck Institute for Nuclear Physics in Heidelberg, Germany.