Despite being 95 times Earth's mass, Saturn's average density is just 0.687 g/cm³—meaning it's theoretically light enough to float in water.
Because Saturn consists overwhelmingly of hydrogen and helium, the two lightest elements in the universe, its huge volume yields a lower bulk density than liquid water.
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Quick Guess: Why is Saturn's average density lower than that of water?
Verified Answer: It is mostly made of light hydrogen and helium
Quiz Question: Why is Saturn's average density lower than that of water?
Correct Answer: It is mostly made of light hydrogen and helium
Being composed mainly of hydrogen and helium gives Saturn a lower average density than water.
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