Webb Detects Hydrogen Sulfide Gas on Three Super-Jupiters

21:12 - 16 Feb 2026

Astronomers using the NASA/ESA/CSA James Webb Space Telescope have for the first time identified hydrogen sulfide gas in the atmospheres of three gas-giant exoplanets orbiting HR 8799, a 30-million-year-old star located in the constellation of Pegasus.

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