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The massive gas giant would float if placed in a vast oceanic basin. 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 is the only solar system planet less dense than water

The massive gas giant would float if placed in a vast oceanic basin

Saturn is composed predominantly of hydrogen and helium, giving it an average density of roughly 0.687 grams per cubic centimetre. Because this average density is lower than that of liquid water, Saturn would theoretically float if dropped into a gargantuan ocean big enough to hold it.

Saturn from Hubble — NASA and The Hubble Heritage Team (STScI/AURA)Acknowledgment: R.G. French (Wellesley College), J. Cuzzi (NASA/Ames), L. · Public domain · source

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NASA Science

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Tags: saturn, density, planets

Saturn is the only solar system planet less dense than water: the short answers

Where does this come from, and can I check it?: The massive gas giant would float if placed in a vast oceanic basin. 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.