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Published online 19 April 2000 | Nature | doi:10.1038/news000420-9

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Running rings around Saturn

Could Saturn be hiding strange dusty halos? Jeremy Thomson reports on a new theory predicting that the planet is circled by unseen off-centre rings.

What do Saturn, Jupiter, Neptune and Uranus all have in common? Rings. These vast, dramatic arcs encircling the planets' equators have become so familiar that no science fiction book cover is complete without them.

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