NASA's James Webb Space Telescope has returned first atmospheric spectra for Earth‑sized, habitable‑zone planet TRAPPIST‑1e: the observations rule out a retained primary (hydrogen‑dominated) atmosphere, with intense stellar flaring the likely stripping mechanism. The result narrows viable atmospheric scenarios without yet resolving surface habitability.
Discovered |
Briefing
JWST spectra for TRAPPIST‑1e rule out a hydrogen‑dominated primary atmosphere and point to intense stellar flaring as the likely cause of atmospheric loss; this reframes the search toward secondary atmospheres and surface conditions — see Webb's earlier possible atmosphere on TRAPPIST‑1e.
The result demonstrates JWST's capability to discriminate atmospheric scenarios for Earth‑sized, habitable‑zone planets, directly informing target selection and instrument requirements for future missions such as the Habitable Worlds Observatory.
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New York Times
• Robin George Andrews