Rings are special, dazzling rarities in our solar system. Now, astronomers have found that an extremely distant world — beyond even Pluto's orbit — is encircled with unusual rings.

Scientists reported that the frigid dwarf planet Quaoar, a round body that doesn't quite meet all the definitions of a planet, has a system of rings enduring at an impressively far distance away from Quaoar. The detection is unexpected, because researchers didn't think rings could survive at a relatively far...

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