A new investigation with NASA’s James Webb Space Telescope into K2-18 b, an exoplanet 8.6 times as massive as Earth, has revealed the presence of carbon-bearing molecules including methane and carbon dioxide. Webb’s discovery adds to recent studies suggesting that K2-18 b could be a Hycean exoplanet, one which has the potential to possess a hydrogen-rich atmosphere and a water ocean-covered surface.

    • sebinspace
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      2410 months ago

      IIRC methane isn’t exclusive to biological processes, but coexisting with carbon dioxide makes it highly unlikely without biological processes

    • @[email protected]
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      610 months ago

      That was my first thought. That doesn’t mean there couldn’t be microbial life there though. One of the gases being released, or supposedly released is mostly made by phytoplankton here. So if anything this may confirm microscopic life forms on other planets.

      Maybe super mini crab or slug people.

      • @[email protected]
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        610 months ago

        It’s probably the mix of all the gasses (including the dimethyl sulfide tentative finding) that makes it exciting. Methane isn’t a bio-signature on its own.