How did these form?  Apparently the asteroid Chariklo has rings like you might see on a planet:

From ESO, observations made at telescopes in South America have made the surprise discovery that the remote asteroid Chariklo is surrounded by two dense and narrow rings. This is the smallest object to have rings and only the fifth body in the Solar System — after the much larger planets Jupiter, Saturn, Uranus and Neptune — to have this feature.

Let’s find out how they may have formed in the video on page 2

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