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How Space Telescopes Spotted an Exoplanet With a Possible Hydrogen-Rich Atmosphere
In September NASA's James Webb Space Telescope investigated an exoplanet 8.6 times as massive as Earth, and "revealed the presence of carbon-bearing molecules including methane and carbon dioxide." Webb's discovery adds to recent studies suggesting that [planet] K2-18 b could be a Hycean exoplanet...
In September NASA's James Webb Space Telescope investigated an exoplanet 8.6 times as massive as Earth, and " revealed the presence of carbon-bearing molecules including methane and carbon dioxide." The abundance of methane and carbon dioxide, and shortage of ammonia, support the hypothesis that there may be a water ocean underneath a hydrogen-rich atmosphere in K2-18 b. Long-time Slashdot reader Baron_Yam noticed some sites resurfacing the news from September this week with more spectacular headlines, like "NASA discovered a planet twice as big as Earth with a gas that is 'only produced by life'" and "Discovery... sparks huge excitement among astronomers. "Upcoming Webb observations should be able to confirm if dimethyl sulfide is indeed present in the atmosphere of K2-18 b at significant levels," explained Nikku Madhusudhan, an astronomer at the University of Cambridge and lead author of the paper announcing these results.
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