This article refers to an astronomical phenomenon : A gas giant (sometimes also known as a Jovian planet after the planet
Jupiter) is a large
planet that is not primarily composed of
rock or other solid
matter. There are four gas giants in our
Solar System;
Jupiter,
Saturn,
Uranus, and
Neptune. Uranus and Neptune may be considered a separate subclass of giant planets, 'ice giants', as they are mostly composed of
ice, rock, as well as gases of
water,
ammonia and
methane, unlike the "traditional" gas giants
Jupiter or
Saturn. However, they share the same qualities of the lack of the solid surface; their differences stem from the fact that their proportion of hydrogen and helium is lower.
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A type of planet which is composed of vast quantities of gas. In our solar system, there are four gas giant planets: Jupiter, Saturn, Uranus and Neptune. Any rocky cores these planets do possess are very small compared with the amount of gaseous material that overlies them.
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