Astrophysics (Index)About

gas planet

(planet made largely of gas)

A gas planet is a planet made largely of gas, such as a gas giant. Gas giants are well known, i.e., Jupiter and Saturn, but smaller gas planets (gas dwarfs) have been recently discovered among extra-solar planets (gas dwarfs). There is no consensus threshold regarding which planets should be termed gas planets: presumably requiring gas-to-core ratio (GCR, in this case, core meaning the solid part of the planet) of at least 1 or at least few times that. Earth's GCR is about a millionth. Those of Jupiter and Saturn are unclear because of the unclear size of any rocky core (and because interior liquid volatiles present additional semantic issues) but certainly well above 1.

(planet type,exoplanets,gas)
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Referenced by pages:
core accretion model
extra-solar planet
gravitational instability model
H-R diagram (HRD)
inertial wave
inflated radii
Lane-Emden equation
liquid planet
metallicity (Z)
pebble accretion
planet formation
planet type
protoplanetary disk (PPD)
tidal migration
tidal Q