Cosmos

Nearby Exoplanet Smells Like Rotten Eggs

Astronomers detect hydrogen sulphide on an extrasolar planet for the first time.

By Bertie Atkinson
HD 189733b contains hydrogen sulfide.
This nearby exoplanet could stink of rotten eggs, because the hot gas envelope of HD 189733b contains hydrogen sulfide. Roberto Molar Candanosa/ Johns Hopkins University
SOURCES:Nature
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