Saturn's moon might have rings, too

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Surrounding particles are most likely electron-absorbing chunks of ice

Saturn's moon Rhea could be a mini version of its ringed parent, and the first moon known to have rings of its own.

Scientists detected hints of the rings when the Cassini spacecraft flew by the moon, Saturn's second largest, in November 2005.

Surprisingly, instruments aboard Cassini measured an absence of electrons around the moon where astronomers expected the charged particles to swarm.


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