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Sudarsky's classification of gas giants for the purpose of predicting their appearance based on their temperature was outlined by David Sudarsky and colleagues in the paper Albedo and Reflection Spectra of Extrasolar Giant Planets [1] and expanded on in Theoretical Spectra and Atmospheres of Extrasolar Giant Planets, [2] published before any successful direct or indirect observation of an ...
The smallest known extrasolar planet that is likely a "gas planet" is Kepler-138d, which has the same mass as Earth but is 60% larger and therefore has a density that indicates a thick gas envelope. [16] A low-mass gas planet can still have a radius resembling that of a gas giant if it has the right temperature. [17]
A giant planet, sometimes referred to as a jovian planet (Jove being another name for the Roman god Jupiter), is a diverse type of planet much larger than Earth. Giant planets are usually primarily composed of low- boiling point materials ( volatiles ), rather than rock or other solid matter, but massive solid planets can also exist.
The Fifth Giant is a hypothetical ice giant proposed as part of the Five-Planet Nice Model, an extension of the Nice Model of solar system evolution. This hypothesis suggests that the early Solar System once contained a fifth giant planet in addition to the four currently known giant planets: Jupiter , Saturn , Uranus , and Neptune . [ 1 ]
[14] [15] The largest planetesimals can grow much faster via pebble accretion, [10] but if the formation or delivery of pebbles is rapid numerous Earth-mass planets form instead of a few giant planet cores. [16] As the largest objects approach Earth-mass the radius from which pebbles are accreted is limited by the Hill radius. [3]
The gas giants in our solar system — Jupiter, Saturn, Uranus and Neptune — are much denser. This giant gas planet is as fluffy and puffy as cotton candy Skip to main content
Astronomers say they have uncovered an unusual planet that’s about 50% bigger than Jupiter and somehow still the second lightest planet ever found. Unusual giant planet as fluffy as cotton candy ...
For the giant planets, the "radius" is defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure. [ 11 ] Because Sedna and 2002 MS 4 have no known moons, directly determining their mass is impossible without sending a probe (estimated to be from 1.7x10 21 to 6.1×10 21 kg for Sedna [ 12 ] ).