In a potential landmark discovery, scientists using the James Webb Space Telescope have uncovered what may be the strongest biosignature evidence yet on an alien planet. The exoplanet K2-18b, located about 124 light-years away in the constellation Leo, shows clear chemical fingerprints – dimethyl sulfide (DMS) and dimethyl disulfide (DMDS) – that on Earth are produced only by living organisms such as marine algae. 🚀👽
With a mass 8.6 times that of Earth and a diameter roughly 2.6 times larger, K2-18b orbits within the "habitable zone" of its red dwarf star – a region where temperatures may allow for liquid water, a key ingredient for life. This exciting discovery hints that the planet might be a "hycean world," potentially covered by a water ocean and boasting a hydrogen-rich atmosphere.
Astrophysicist Nikku Madhusudhan described this moment as transformational for the field of observational astrobiology, emphasizing that while the signs are incredibly promising, caution is necessary. The intriguing biosignature could also be explained by non-biological processes, which means further observations and studies are essential to confirm the findings.
This breakthrough fuels humanity's timeless wonder: "Are we alone in the universe?" As scientists plan to repeat observations and deepen research, this discovery marks a significant step forward in our quest to unravel cosmic mysteries. Stay tuned for more updates on this remarkable journey into the unknown! 🌌
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Scientists find strongest evidence yet of life on an alien planet
cgtn.com
