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Gas giant
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A gas giant is a giant planet composed mainly of hydrogen and helium. There are two gas giants in the Solar System: Jupiter and Saturn. The term "gas giant" was originally synonymous with "giant plane
Artist's impression of the formation of a gas giant around the star HD 100546
Artist's impression of the formation of a gas giant around the star HD 100546
A gas giant exoplanet [right] with the density of a marshmallow has been detected in orbit around a cool red dwarf star [left] by the NASA-funded NEID
A gas giant exoplanet [right] with the density of a marshmallow has been detected in orbit around a cool red dwarf star [left] by the NASA-funded NEID radial-velocity instrument on the 3.5-meter WIYN Telescope at Kitt Peak National Observatory.
PDS 70
PDS 70
Ice giant
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An ice giant is a giant planet composed mainly of elements heavier than hydrogen and helium, such as oxygen, carbon, nitrogen, and sulfur. There are two ice giants in the Solar System: Uranus and Nept
Gas giant
…giant planet". However, starting in the 1970s and continuing into the 1980s, it became increasingly common to classify Uranus and Neptune separately as ice giants, a distinct class of giant planets composed mainly of heavier volatile substances (referred to as "ices"). Jupiter and Saturn consist mostly of hydrogen…
These cutaways illustrate interior models of the giant planets. The planetary cores of gas giants Jupiter and Saturn are overlaid by a deep layer of m
These cutaways illustrate interior models of the giant planets. The planetary cores of gas giants Jupiter and Saturn are overlaid by a deep layer of metallic hydrogen, whereas the mantles of the ice giants Uranus and Neptune are composed of heavier elements.