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Billions of icy fragments range from microscopic specks to house-sized boulders. The figure is taken from NASA Science, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Saturn rings consist almost entirely of water ice

Billions of icy fragments range from microscopic specks to house-sized boulders

Saturn's extensive ring system is made up of over 99 percent pure water ice particles, with minor trace impurities like rocky dust. Despite spanning up to 282,000 kilometres in diameter, the main ring structure is amazingly thin, averaging only about ten metres in thickness.

Saturn's Rings Close Up from Voyager 1 — NASA · Public domain · source

Where this comes from

NASA Science

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Tags: saturn, rings, ice

Saturn rings consist almost entirely of water ice: the short answers

Where does this come from, and can I check it?: Billions of icy fragments range from microscopic specks to house-sized boulders. The figure is taken from NASA Science, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a space fact?: Yes. It sits on the Space shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.