http://www.bbc.co.uk/news/science-environment-11488797
An unknown wonder has now, maybe, finally been discovered. Saturn's rings may have been formed when a large moon with an icy mantle and rocky core spiralled into the planet. This theory helps explain the rings' mainly water-ice composition which has puzzled researches. The scientist with this new theory, Dr. Canup, says the rings must have formed essentially as pure ice. Professor Carl Murray had two other theories that Dr. Canup disagreed with. One ivolved an icy comet breaking up in the Saturn's vicinity and the other theory said a small moon was pulled in by the planet's gravitational field. Dr. Canup believes that as this "huge moon" was about to hit Saturn, the planet's tidal forces could have This mission to figure out the true theory is the Cassini mission which is planned to continue to 2017.
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