Scientists may have solved solar system mystery of Saturn's rings
NASA's Cassini spacecraft and university researchers have offered an answer to the 4.5 billion-year mystery of Saturn's rings' origins.
Saturn
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Cassini crashes into Saturn ending landmark mission
It was one of the most ambitious and successful space missions ever undertaken.
Space image shows Earth from 900 million miles away
Earth appears as a tiny blue dot in a rare photo taken from Saturn by NASA's Cassini spacecraft.