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K2-18 b spectra

K2-18 b spectra
K2-18 b spectra James Webb Space Telescope's (JWST) NIRISS and NIRSpec instruments detected methane and carbon dioxide in the atmosphere of exoplanet K2-18 b, along with potential traces of dimethyl sulfide (DMS), a substance that is created on Earth by living creatures. These findings, including low ammonia, suggest an ocean under a hydrogen-rich atmosphere on K2-18 b, an exoplanet 8.6 times Earth's mass, orbiting the dwarf star K2-18 in the habitable zone, 120 light-years away. NASA / CSA / ESA / J. Olmsted (STScI) / N. Madhusudhan (Cambridge University)