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Webb Telescope observes helium escaping WASP-107b, a hot, puffy exoplanet losing its atmosphere.
Using the James Webb Space Telescope, astronomers detected helium escaping from the exoplanet WASP-107b in a cloud stretching nearly 10 times the planet’s radius, the most confident pre-transit helium absorption observed.
The low-density "super-puff" planet, located 210 light-years away and orbiting seven times closer to its star than Mercury does to the Sun, is losing its atmosphere due to intense stellar heating.
Webb’s instruments confirmed water, carbon monoxide, carbon dioxide, and ammonia in the atmosphere but found no methane, suggesting strong vertical mixing.
The findings offer new insights into how planetary atmospheres evolve under extreme conditions.
El telescopio Webb observa el helio escapando de WASP-107b, un exoplaneta caliente e hinchado que pierde su atmósfera.