How are gas giant exoplanets born? James Webb Space Telescope provides new clues Relatedly, astronomers may have just pushed the upper size limit of what counts as a planet. Astrobitica February 10, 2026 (Last updated: February 10, 2026) 1 minute read Relatedly, astronomers may have just pushed the upper size limit of what counts as a planet. About the Author Astrobitica Administrator Visit Website View All Posts Post navigation Previous: Chang’e-6 samples constrain lunar impact flux and illuminate early impact historyNext: Non-venture space startup investment hits post-SPAC high