Chthonian planet
Gas giants with their atmospheric layers stripped / From Wikipedia, the free encyclopedia
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Chthonian planets (/ˈkθoʊniən/, sometimes 'cthonian') are a hypothetical class of celestial objects resulting from the stripping away of a gas giant's hydrogen and helium atmosphere and outer layers, which is called hydrodynamic escape. Such atmospheric stripping is a likely result of proximity to a star. The remaining rocky or metallic core would resemble a terrestrial planet in many respects.[1]