Astronomy & Space Science · AST-602
Hot Jupiters, Super-Earths & Mini-Neptunes: Structures & Vocabulary
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Structure
Structure of Hot Jupiters, Super-Earths & Mini-Neptunes
Hot Jupiters are gas giants on very short-period orbits. Super-Earths are larger or more massive than Earth but smaller than Neptune, while mini-Neptunes occupy a similar size range but retain substantial volatile envelopes. Radius alone does not uniquely determine composition.
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References & evidence
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- 01Exoplanet FactsOpen source ↗
NASA Science
View claim-by-claim traceability3 verified claims
Close-in giant planets likely form farther from their stars and migrate inward or undergo dynamical rearrangement.
supported · checked Sep 22, 2026Exoplanet surveys revealed planetary classes that are rare or absent in the Solar System, including hot Jupiters, super-Earths, and mini-Neptunes.
supported · checked Sep 22, 2026Transit surveys measure radii and periods, radial velocities measure masses, and combined density measurements reveal a wide range of compositions.
supported · checked Sep 22, 2026