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JWST Might Have Imaged a Hycean World for the First Time, With a Hydrogen-Rich Atmosphere and a Deep Planet-Wide Water Ocean
Astronomers have directed JWST to examine the atmosphere of an exoplanet called K2-18 b, which orbits a cool dwarf star about 120 light-years from Earth. The planet is 8.6 times as massive as Earth, and the observations have revealed methane and carbon dioxide in its atmosphere. This opens up the intriguing possibility that this exoplanet is an example of a theorized
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