Carbon dioxide is a key chemical species that is found in a wide range of planetary atmospheres. This transmission spectrum of WASP-39b was captured by Webb’s Near-Infrared Spectrograph (NIRSpec) on July 10, 2022. Image credit: NASA / ESA / CSA / Leah Hustak, STScI / Joseph Olmsted, STScI. WASP-39b is a hot gas giant that orbits the G7-type star WASP-39 with a period of 4.1 days. First discovered in 2011, the planet has approximately the same mass...
