Detailed Solution. Saturn is the only planet which can float on water because its density is even lower than of water that is around 770kg per cubic meter which makes it float on water and no other planet has density low than Saturn's.
Would Jupiter float in a body of water? No, Jupiter would sink. Your question is probably based on the often quoted statement that if Saturn were placed in a body of water large enough, it would float. That is based on its average density, calculated by dividing total mass by volume.
In fact, if you could find a pool big enough it would float on it. Imagine a pool that size. Uranus comes in second as the least dense planet. What this means that instead of floating, Uranus would actually sink in water.
Saturn is HUGE. However, all huge things don't have huge densities. In fact, the mass of Saturn is low enough such that the overall density of Saturn is less than the density of liquid water on Earth.
Uranus is a ball of ice and gas, so you can't really say that it has a surface. If you tried to land a spacecraft on Uranus, it would just sink down through the upper atmosphere of hydrogen and helium, and into the liquid icy center.
69 so,water has low density than mercury,so water floats than mercury.
You could throw things farther than you could on Earth. Would you float away on Mars? A. No, there is still plenty of gravity to hold you down.
The density of Neptune is 1.638 g/cm3. Just to give you some comparison, the density of water is 1 g/sm3. In other words, if you had a bathtub big enough, Neptune would sink into it.
Saturn has the lowest density of any planet, 0.7 g/cc, which is less than that of water. Saturn is of such low density that it would float in a (gigantic) bathtub. However, you would not want to put Saturn in a bathtub.
Next time you visit Jupiter remember to take an umbrella with you. Researchers at the University of California, Berkeley have discovered that drops of helium rain, laced with neon, could be falling from the clouds. Somewhere deep inside Jupiter it is raining helium. Image: NASA/JPL/University of Arizona.
Jupiter has both wet and dry regions, just as Earth has tropics and deserts, according to new images and data from the Galileo spacecraft released today.
Oceans Beyond
Water vapor has been discovered on a planet roughly the size of Neptune; the smallest exoplanet known to have water. HAT-P-11b is 120 light years away in the constellation Cygnus and sits close to its star in a five-day orbit.
Researchers discovered at least seventy free-floating planets in a region of the Milky Way known as the Upper Scorpius OB stellar association.
It is probably not possible for a planet to be entirely liquid. This is because a planet needs to be 'self-gravitating' so that it holds its spherical shape under gravity. It thus requires a substantial amount of mass, which means the pressure and temperature in the inner regions are usually high.
Uranus' environment is not conducive to life as we know it. The temperatures, pressures, and materials that characterize this planet are most likely too extreme and volatile for organisms to adapt to.
While a spacecraft would have nowhere to land on Jupiter, it wouldn't be able to fly through unscathed either. The extreme pressures and temperatures deep inside the planet crush, melt, and vaporize spacecraft trying to fly into the planet.
Venus is notoriously toxic and excruciatingly hot. A thick, extremely acidic cloud layer enshrouds the rocky planet, trapping so much heat that the surface reaches nearly 900 degrees Fahrenheit. That's more than hot enough to melt lead.
Your Body Will Float on Mercury, and it Will Feel Weird.
There is no known health risk related to mercury from swimming, boating, or catch and release fishing.
Density plays a key role in determining whether objects will sink or float in fluids and gases. Gold sinks in water because gold is denser than water, and pine floats in water because pine is less dense than water.
Saturn's atmosphere is very thick and its pressure increases the deeper you go. After a while, you would stop sinking and unfortunately be crushed by the high pressure deeper in Saturn's atmosphere.
Saturn is made up mainly of hydrogen and helium, in both gas and liquid forms. You couldn't stand on Saturn, because there's no solid surface to stand on.
But temperatures at this region would be thousands of degrees; hot enough to melt rock. And the pressure from the weight of all the atmosphere would be crushing. In short, there is simply no way one could stand on the “surface of Neptune”, let alone walk around on it.