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Dimethyl Sulfide

All articles tagged with #dimethyl sulfide

space6 days ago•12 min saved

DMS hints on a distant ocean-world exoplanet spark debate over life signals

K2-18b, a sub-Neptune about 124 light-years away, is a leading Hycean candidate that could harbor a global ocean beneath a hydrogen-rich atmosphere. Webb observations yielded two tentative signals of dimethyl sulfide, a gas commonly linked to marine life on Earth, but independent analyses question whether DMS was truly detected, leaving the existence of a biosignature on the planet unresolved and highlighting the need for more data and standardized detection criteria.

via Space Daily|

#biosignature #dimethyl-sulfide #exoplanets

space-science2 years ago•3 min saved

"NASA's Webb Telescope Uncovers Potential Water World with Signs of Life"

The Webb Space Telescope has detected possible molecular signals on the exoplanet K2-18 b, suggesting it may be a Hycean world covered in a global ocean with a hydrogen atmosphere. The telescope observed signs of water vapor on the exoplanet, which lies in its star's habitable zone. The presence of carbon-bearing molecules indicates the possibility of a water ocean beneath the hydrogen atmosphere. Additionally, the telescope detected a potential detection of dimethyl sulfide, a molecule produced on Earth by living organisms. Further observations will be conducted to confirm the presence of dimethyl sulfide and better understand the nature of this water world.

via Gizmodo|

#dimethyl-sulfide #exoplanet #hycean-world