The James Webb telescope spotted CO2 in an exoplanet’s atmosphere
It’s the first definitive detection of the greenhouse gas at a planet outside the solar system
![blurry illustration of the exoplanet Wasp-39 b with its star in the background](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2022/08/082622_lg_jwst-exoplanet_feat.jpg?fit=1030%2C580&ssl=1)
The James Webb Space Telescope found signs of carbon dioxide in the atmosphere of the gas giant exoplanet WASP-39 b (illustrated, with its star).
NASA, ESA, CSA and J. Olmsted/STScI