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JWST Uncovers Silane on Brown Dwarf, Confirms Water on K2-18b
9/24/2025
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Story summary
- James Webb Space Telescope (JWST) detects silane in atmosphere of brown dwarf The Accident, signaling silicon’s absence in Jupiter and Saturn.
- Nature notes low oxygen in ancient atmospheres allowed silicon to bond with hydrogen, forming silane rather than oxides.
- NASA confirms water vapor on exoplanet K2-18b, hinting at a hydrological cycle.
- Upcoming observations will study K2-18b’s atmosphere for possible biomarkers.
