SCIENCE · VERIFIED DEVELOPMENT
James Webb Detects Atmosphere on Hot Lava Planet HD 3167 b
WHY IT MATTERS
Understanding how a scorching, lava‑covered planet can keep an atmosphere informs models of atmospheric loss and retention, shedding light on the early conditions of Earth and other rocky exoplanets.
What happened
The James Webb Space Telescope has identified clear evidence that the rocky exoplanet HD 3167 b, which orbits its star every 24 hours and is bathed in extreme heat, possesses an atmosphere. This finding is unexpected because such intense stellar irradiation typically strips away gaseous envelopes from close‑in rocky worlds.
By confirming that HD 3167 b retains a gaseous layer, the study offers new insight into the mechanisms that allow rocky planets to hold onto atmospheres under harsh conditions.
The result also provides a valuable analog for the early, molten Earth, helping scientists reconstruct how our own planet may have evolved during its formative years.
PRIMARY SOURCES
Webb finds a surprising atmosphere on a scorching lava world
ScienceDaily · Discovery only; verify against the cited research or institution when available
CORRECTIONS & UPDATES
- Revision 1 · Initial ingestion · Oct 7, 2026, 2:15 PM
- Revision 2 · Source update detected · Oct 7, 2026, 2:15 PM