New findings made possible by the James Webb Space Telescope reveal that the Earth-like exoplanet Trappist-1 b may have an atmosphere after all, potentially overturning earlier findings. Approximately forty light years from Earth, seven planets orbit the star Trappist-1, three of which–Trappist-1e, f, and g–exist in the star’s habitable zone and could theoretically be warm enough to allow for liquid water on their surfaces. Since its launch, the James Webb Space Telescope (JWST) has logged 290 hours observing the Trappist-1 system across ten research endeavors. Elsa Ducort of Paris’s Commissariat aux Énergies Atomiques (CEA) led the study team, which analyzed...