Saturn didn’t always have rings. New data from NASA’s Cassini spacecraft suggests the rings may be less than 100 million years old-possibly younger than some dinosaurs. Cassini measured the mass of the rings and found they’re too bright and clean to be ancient. If they were billions of years old, they would be coated in cosmic dust. That means Saturn’s famous rings are a recent feature in the history of our solar system, not something the planet was born with. They were likely formed from a shat
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