Another Earth-like Exoplanet Crossed Off The List: The JWST Shows That GJ 3929b Has No Atmosphere Astrobitica August 21, 2025 1 minute read In 2022, astronomers announced the discovery of GJ 3929b. It’s a rocky planet, similar to Earth in both mass and size. Astronomers have examined the planet with the JWST and concluded that it’s a barren world with no atmosphere. About the Author Astrobitica Administrator Visit Website View All Posts Post navigation Previous: Astronomers discover strange new type of supernova: ‘This is the first time we have seen a star that was essentially stripped to the bone’Next: Secretive mini space shuttle set for Space Coast launch; late-night sonic boom possible