James Webb Space Telescope detects potential water vapor on exoplanet GJ 486 b, though follow-up suggests a bare surface or stellar interference

Initial observations by the James Webb Space Telescope (JWST) detected a signal resembling water vapor in the atmosphere of the rocky exoplanet GJ 486 b, located 26 light-years away. However, subsequent data indicated that the planet likely has little to no atmosphere, with the signal possibly originating from cooler regions (starspots) on the star's surface. This highlights the complexities of characterizing exoplanet atmospheres, particularly for rocky planets orbiting red dwarfs.