Q:

What planet has a density less than water?

A:

Quick Answer

Water has a greater density than only the planet Saturn. All of the planets in the solar system have a density that is superior to that of Saturn. Saturn is one of the gas giants, made largely of hydrogen, and the second largest planet in the solar system.

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Full Answer

Saturn is close to 800 times larger than Earth, making it the most dense of all planets. Only the planet Jupiter has a greater mass than Saturn. Jupiter has the second lowest density in the solar system, and has the same composition, hydrogen and helium, as the least dense planet. The large degree of gas composition of Saturn and Jupiter is responsible for the low densities.

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Related Questions

  • Q:

    What is the density of Mars?

    A:

    Mars has a mean density of 3,933 kilograms per cubic meter, or 3.94 grams per cubic centimeter, according to NASA. By contrast, Earth has an average density of 5.51 grams per cubic centimeter. Mars is therefore only around 71 percent as dense as Earth.

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  • Q:

    What is the density of Jupiter?

    A:

    The density of Jupiter is 1.33 grams per cubic centimeter, making it 0.24 times as dense as Earth. It is the second-most dense of the gas giants.

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  • Q:

    What is Pluto's density?

    A:

    The density of Pluto is 2.050 grams per cubic meter. This makes this dwarf planet a little more than a third as dense as Earth.

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  • Q:

    Which planet has the weakest gravity?

    A:

    The planet with the weakest gravitational pull is Mercury. Mercury's gravitational pull is 3.7 meters per second-squared, which is less than half Earth's gravitational pull of 9.81 meters per second-squared. An object that weighs 100 pounds on Earth would weigh 38 pounds on Mercury.

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