a generic astronomical term invented by the science fiction writer James Blish to describe any large planet that is not composed mostly of rock or other solid matter
Four of the planets in the outer reaches of the Solar System are described as gas giants – Jupiter, Saturn, Uranus and Neptune. Although they have a solid core, they are composed mainly of various gases. They were formed from the lighter, gassier elements, rather than the heavier, rockier ones that produced the inner planets. Pluto, the other planet in the outer Solar System, is not a gas giant.
A large planet composed mostly of gas, e.g. the Jovian planets.
A large, icy and gaseous planet in the outer solar system.
one of the four outer planets made out of giant balls of gas.
a large planet made primarily of gas; such as Jupiter, Saturn, Uranus, and Neptune.
Big planets made nearly completely of gas (eg Jupiter, Saturn).
A massive planet such as Jupiter or Saturn composed mainly of gases with no solid surface.