The discovery of dimethyl sulphide is especially intriguing because it is only produced by life on Earth, and mostly in marine environments
“Could this planet support life? We can’t say for sure. We did detect a molecule at a tentative level, dimethyl sulphide, and this molecule is unique to life on Earth and it has been predicted that it would be a very good biosignature for life on other planets.” K2-18 b orbits the cool dwarf star K2-18 in the habitable zone and lies around 705 trillion miles from Earth in the constellation Leo.
“We have obtained the most detailed spectrum of a habitable-zone sub-Neptune to date, and this allowed us to work out the molecules that exist in its atmosphere.” “These results are the product of just two observations of K2-18 b, with many more on the way,” added team member Savvas Constantinou of the University of Cambridge.
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