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“Most promising signs yet” of alien life on a planet beyond our Solar System
Astronomers find most promising signs yet of biosignature on exoplanet K2-18b, dimethyl sulfide, which could indicate life on its surface.
This graph shows detections of chemicals in the atmosphere of K2-18b by the James Webb Space Telescope, as part of the 2023 study"We didn’t know for sure whether the signal we saw last time was due to DMS, but just the hint of it was exciting enough for us to have another look with JWST using a different instrument," says Professor Nikku Madhusudhan from Cambridge’s Institute of Astronomy, who led the research. "It was an incredible realisation seeing the results emerge and remain consistent throughout the extensive independent analyses and robustness tests," says co-author Måns Holmberg, a researcher at the Space Telescope Science Institute in Baltimore, USA. Credit: NASA GSFC/CIL/Adriana Manrique Gutierrez"The inference of these biosignature molecules poses profound questions concerning the processes that might be producing them" says study co-author Subhajit Sarkar of Cardiff University.
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