"Lifeless Sub-Earth: GJ 367b's Harsh Conditions Revealed"

Astronomers using the James Webb Space Telescope have discovered that Gliese 367 b, a sub-Earth exoplanet, is dark, hot, and lacks a detectable atmosphere. The planet, located 31 light years away, has an equilibrium temperature of 1,367 K and orbits its parent star every 7.7 hours. Observations using JWST's Mid-Infrared Instrument revealed that Gliese 367 b has no atmosphere, no heat redistribution, and a dark surface with a dayside temperature of 1,728 K and a nightside temperature below 847 K. The lack of atmosphere suggests that the planet has considerably fewer volatiles compared to Earth, possibly due to intense stellar irradiation.