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Unformatted text preview: many collisions keep ring thin Rings arent leftover from planet formation-- the particles are too small to have survived this long.maybe. . There must be a continuous replacement of tiny particles. .we think. . The most likely source is impacts with the jovian moons. .maybe. Jovian planets have rings because they have lots of Moons! Compared to Saturn, the other ring systems: have fewer particles are smaller in extent have darker particles Why??? Other unsolved mysteries: Uranus rings are eccentric and slightly tilted from its equatorial plane. Neptune has partial rings...
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- Spring '08