Rocky exoplanet unlikely to have thick CO2 atmosphere, says Webb.

NASA's James Webb Space Telescope has measured the heat radiating from TRAPPIST-1 c, an exoplanet orbiting a red dwarf star 40 light-years from Earth. The result suggests that the planet's atmosphere, if it exists at all, is extremely thin. TRAPPIST-1 c is one of seven rocky planets orbiting an ultracool red dwarf star, and the result marks another step in determining whether planets orbiting small red dwarfs like TRAPPIST-1 can sustain atmospheres needed to support life as we know it.