It's unclear exactly what that "disturbance in the force" is in the ring image on this slide, but scientists think it's from a small, icy object in Saturn's rings. Why the commotion? The theory is this object is slowly migrating out of the rings. The object (nicknamed "Peggy") was very tiny, just half a mile in diameter, and was not expected to grow any bigger. But in the past, if Saturn had more massive rings, this same process could explain how other icy moons would have formed. This includes Enceladus, a moon famous for its dozens of water-spouting geysers. "We have not seen anything like this before," said Carl Murray of Queen Mary University of London, lead author of the study (published in Icarus), in a NASA press release. "We may be looking at the act of birth, where this object is just leaving the rings and heading off to be a moon in its own right."
Image: At bottom in this Cassini image from 2014 is a disturbance that may be linked to an icy object created in Saturn's rings. Credit: NASA/JPL-Caltech/Space Science Institute