Possible life on K2-18b? Webb Spots DMS
In April 2025 The strongest tips possible biology in the world outside our solar system. Exoplanet K2-18b shows signs Dimetyle sulfide (DM)– gas on earth associated with sea life – next to methane AND Carbon dioxidein accordance with the potential “Hycean” Ocean World. Researchers emphasize this not proof of lifeBut promising lead, which requires further observation.
What has been detected – and why does it matter
- Signature DMS/DMDS: The team reports a spectral signal in accordance with Dimethylbulent (or his close cousin, Disiarczd Dimethile). On Earth, DMS is mostly produced by marine microorganisms.
- Contextual molecules: Earlier Webb observations were also found methane (chapter4) AND Carbon dioxide (CO2) In K2-18B, he adds weight to the Hydromeń scenario: a atmosphere opulent in hydrogen over deep oceans.
- Caution first: The authors emphasize the detection uncertain (about 3-sigma) and must be confirmed by more data and the exclusion of non-biological chemistry.
Watch: the author on the discoveries
https://www.youtube.com/watch?v=sprr4dgmtxi
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What is the Hycen world?
Hycean planets are under-ponduts with Atmosphere opulent in hydrogen It can be Global oceans. Because they are larger than Earth, their atmosphere is easier to analyze telescopes – creating their main goals of early biosignatura search.
Why astronomers are still cautious
Some researchers note that the DMS/DMDS signal requires independent confirmation and that Abiotic paths must be excluded thoroughly. Others indicate that detecting one possible biosignature without apartment Supporting molecules can be misleading. Expect the community to examine K2-18B with additional Webb and improved models before anyone makes stronger claims.
Background: methane & co2 on K2-18b
Webb previously detected methane AND CON2 In the atmosphere of K2-18b, with a significant lack of ammonia-available, which initially placed this world on a brief Hycean list. These results helped determine the ground for DMS search.
Sustainable translator: Why the result is thrilling – and why skepticism matters.
Key results
- So far the most promising tip: Possible DMS/DMDS on K2-18B, gas-related gas on Earth.
- Hycean context: Methane + CO2 And atmospheric tips are in line with the script of the ocean world.
- Not proof: The signal is uncertain; More WebB data and rapporters are necessary.
Sources
Tags: Exoplanes, K2-18b, DMS, Biosignature, JWST, Hycean Worlds, Astrobiology
Image Source: Pixabay.com
