Closest Exoplanet Yet? JWST Reveals Neighboring Planet Candidate

Join astronomers Franck Marchis (SETI Institute) and Julien Girard (Space Telescope Science Institute) for a 30-minute live discussion unpacking NASA's exciting new findings from JWST. Just announced, JWST has revealed strong evidence of a Saturn-mass gas giant orbiting Alpha Centauri A—the Sun's nearest solar twin—located just 4 light-years away. The planet appears to orbit at about 1 to 2 AU, placing it within the star's habitable zone, though as a gas giant, it's not likely habitable itself. (Recorded live 8 August 2025.)