Astronomers have discovered the first known asteroid with a ring. Asteroid 10199 Chariklo, an asteroid orbiting between Saturn and Uranus, is the first object known to have a ring that isn’t a gas giant. The two concentric rings are dense, thin, and bright according to astronomers. The outer ring is 3 km wide and the inner ring is 6.5 km wide with a gap of 9 km between the rings. Chariklo is 250 km wide.
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