Saturn
The ringed jewel of our solar system
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine and a half times that of Earth. It has only one-eighth the average density of Earth.
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Despite consisting mostly of hydrogen and helium, most of Saturn's mass is not in the gas phase, because hydrogen becomes a non-ideal liquid when the density is above 0.01 g/cm³, which is reached at a radius containing 99.9% of Saturn's mass.
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The outer atmosphere of Saturn contains 96.3% molecular hydrogen and 3.25% helium by volume. Saturn's most famous feature is its prominent ring system, which consists mostly of ice particles with a smaller amount of rocky debris and dust.