They’ve detected sulfur-based molecules in the atmosphere of exoplanet K2-18b that, on Earth, are only produced by living organisms. While the evidence isn’t conclusive yet, it matches predictions for a “Hycean” world — one potentially covered in oceans and capable of hosting microbial life. If further observations confirm these findings, it could mark a turning point in our search for extraterrestrial life.
Possible Biosignature Found on Distant Exoplanet
Astronomers have found the most compelling potential signs of life yet beyond our solar system — but they’re interpreting the results with caution.
Using data from the James Webb Space Telescope (JWST), a team led by the University of Cambridge has identified possible traces of the molecules dimethyl sulfide (DMS) and/or dimethyl disulfide (DMDS) in the atmosphere of exoplanet K2-18b. This planet orbits within the habitable zone of its star, where conditions might allow liquid water to exist.
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