Saturn would float in water
Yep, the ringed planet is less dense than water, so it'd bob right on top
Picture a bathtub the size of our solar system
What would happen if you placed the planet Saturn in a massive cosmic bathtub?
- Yep, the ringed planet is less dense than water, so it'd bob right on top
- This lack of density creates strange physics at the surface.
- The planet is also spinning so fast that it has flattened itself out.
Saturn is the only planet in our solar system that is less dense than liquid water. Despite being 95 times more massive than Earth, its composition is so light and airy that it weighs only about 0.687 grams per cubic centimeter.
Most of the planet consists of hydrogen and helium. While the core is likely a dense mix of rock and ice, the vast majority of Saturn's volume is occupied by gas layers that lack the tight molecular packing found on rocky planets. Saturn's average density is lower than water's, though the planet's massive gravity and gaseous composition mean it couldn't actually float in a real-world scenario.
This lack of density creates strange physics at the surface. Gravity on Saturn is surprisingly similar to Earth's because the planet's mass is spread across such a gigantic area. You would feel almost normal standing on a platform there, provided you didn't fall through the clouds.
The planet is also spinning so fast that it has flattened itself out. It is noticeably wider at the equator than it is from top to bottom, a shape called an oblate spheroid. This rapid rotation causes the planet to bulge at the equator, giving it the most pronounced 'oblate spheroid' shape in the solar system.
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