James Webb Space Telescope Discovers Potential Signs of Life in the Atmosphere of a Distant Exoplanet

In a landmark announcement that has sent shockwaves through the scientific community, astronomers using the James Webb Space Telescope (JWST) have detected what may be the most compelling evidence yet for biological activity beyond our solar system — a complex mixture of atmospheric gases on the exoplanet K2-18b that could only be explained by living organisms.

Idézet ek

— Szerző neve

The discovery, published simultaneously in the journals Nature Astronomy and The Astrophysical Journal Letters, centres on the detection of dimethyl sulfide (DMS) and methyl chloride in the atmosphere of K2-18b — a so-called "Hycean world" orbiting a red dwarf star approximately 120 light-years from Earth in the constellation Leo. On our own planet, DMS is produced almost exclusively by marine phytoplankton and certain bacteria, making its presence in an alien atmosphere an extraordinary finding.

"We want to be very careful not to overstate what we've found," said lead researcher Professor Nikku Madhusudhan of Cambridge University's Institute of Astronomy. "But the data is extraordinary. We are seeing chemical signatures that, on Earth, are unambiguously biological in origin. The question now is whether the same holds true for K2-18b."