JWST finds the planet TRAPPIST-1b may not have an atmosphere

James Webb Space Telescope finds no atmosphere on Earth-like TRAPPIST-1 exoplanet

[NASAWebb] TRAPPIST-1 b: We give it a one (M-dwarf) star review; it lacks atmosphere. Webb found the dayside temperature of this rocky exoplanet to be about 450º F (227º C) — suggesting it has no significant atmosphere

The biggest planet orbiting TRAPPIST-1 doesn’t appear to have an atmosphere