What planet in our solar system has a density less than that of water?
Question:
Answer:
Saturn
"Saturn, in fact, has an average density less than that of water."
"Overall, Saturn has the lowest density of any planet (less than that of water)."
"Saturn is the least dense of the planets; its specific gravity (0.7) is less than that of water."
The mean density of Saturn is 0.69 g / cm^3
The mean density of water is 1 g / cm^3
However, the core of Saturn is a lot higher density as it is a solid rocky core. Then above this is a 21,000km thick layer of liquid metallic hydrogen. So the density of any other overlying layers must be much less than 0.69 g / cm^3.
the answer is saturn.
http://en.wikipedia.org/wiki/saturn...
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