A sub-Neptune, also known as a mini-Neptune, is a type of exoplanet smaller in radius than Neptune, but larger than the small planet radius gap. Based on their low bulk densities, these planets likely possess a low density envelope surrounding a rocky core.
A sub-Neptune, also known as a mini-Neptune, is a type of exoplanet smaller in radius than Neptune, but larger than the small planet radius gap. Based on their low bulk densities, these planets likely possess a low density envelope surrounding a rocky core.
Source: Wikipedia "Sub-Neptune" · CC BY-SA 4.0
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