The exoplanets, those planets that gravitate around other stars than the Sun, show an amazing diversity. Among them, one category is of particular interest to astronomers: the "sub-Neptune". They dominate the known exoplanet population and do not have an analogy in the Solar System. About half of the exoplanets discovered to date have a radius of between two and four times that of the Earth. Four times the radius of the Earth corresponds to the …
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The exoplanets, those planets that gravitate around other stars than the Sun, show an amazing diversity. Among them, one category is of particular interest to astronomers: the "sub-Neptune". They dominate the known exoplanet population and do not have an analogy in the Solar System. About half of the exoplanets discovered to date have a radius of between two and four times that of the Earth. Four times the radius of the Earth corresponds to the …