Gas Planets
Gas planets are a category of planets without any solid metals or rock.
Gas planets are also referred to as gas giants, giant planets, and
Jovian planets. Since gas planets do not have a solid surface, you would
not be able to walk on them. Gas planets are said to have a rocky
center; however, that term is somewhat misleading. Scientists believe
that due to the high temperatures and extreme pressures in the center of
gas planets their rocky centers are actually liquid metal or rock.
Thus, the density of the gas planets simply increases as you go deeper
to the center.
There are four gas planets in our Solar System: Jupiter, Saturn, Uranus,
and Neptune. The other four planets are known as terrestrial planets.
The gas giants in our Solar System are also called the outer planets
because they are the four planets in the Solar System furthest from the Sun
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