One Ring, Two Ring, Red Ring, Blue Ring

From the BBC:

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Astronomers have discovered that the planet Uranus has a blue ring - only the second found in the Solar System.

Like the blue ring of Saturn, it probably owes its existence to an accompanying small moon.

Scientists suspect subtle forces acting on dust in the rings allow smaller particles to persist while larger ones are recaptured by the moon.

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Here's the original article from Science magazine with more pictures, diagrams and technical details.