Cassini Sees Moon Building Giant Snowballs in Saturn Ring

While orbiting Saturn for the last six years, NASA?s Cassini spacecraft has kept a close eye on the collisions and disturbances in the gas giant?s rings. They provide the only nearby natural laboratory for scientists to see the processes that must have occurred in our early solar system, as planets and moons coalesced out of disks of debris.



New images from Cassini show icy particles in Saturn?s F ring clumping into giant snowballs as the moon Prometheus makes multiple swings by the  [...]

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