gas giant - any of the four outermost planets in the solar system; much larger than Earth and gaseous in nature (like Jupiter)Jupiter - the largest planet and the 5th from the sun; has many satellites Neptune - a giant planet with a ring of ice particles; the 8th planet from the sun Saturn - a giant planet which is surrounded by three planar concentric rings of ice particles; 6th planet from the sun superior planet - any of the planets whose orbit lies outside the earth's orbit Uranus - a giant planet with a ring of ice particles; 7th from the sun |