Super-Earth
LHS 1140 b is an exoplanet 48 light-years away in the constellation Cetus, initially thought to be a mini-Neptune with a thick hydrogen-rich atmosphere. New data from the James Webb Space Telescope suggests it may be a super-Earth with a rocky or water-rich surface and a nitrogen-rich atmosphere. Located in its star’s habitable zone, LHS 1140 b has potential for liquid water, with models indicating it could be a “snowball” planet with a central ocean at 20°C. This discovery, led by the Université de Montréal, highlights the planet’s suitability for further habitability studies.
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