by Juliette Collen Paris, France (AFP) The James Webb Space Telescope has measured the temperature of a rocky exoplanet for the first time, finding that a “cousin” of Earth most likely lacks an atmosphere, researchers said Monday. When the Trappist-1 system was discovered in 2017, astronomers were excited at the prospect that some of its seven rocky planets — which are roughly similar to Earth in size and mass — could be habitable. Just 40 […]