Saturn
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 only has one-eighth the average density of Earth.
Source:
Wikipedia
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.
Source:
Wikipedia
The outer atmosphere of Saturn contains 96.3% molecular
hydrogen and 3.25% helium by volume. The planet's most famous
feature is its prominent ring system, which is composed mostly
of ice particles with a smaller amount of rocky debris and
dust.
Source:
Wikipedia
