Will Pluto become a planet again? The ongoing debate (opens in new tab)

Is Pluto a planet? Scientists and the public have debated this question since its reclassification as a dwarf planet in 2006. In this livestream, astronomer Alan Stern of NASA’s New Horizons mission joins us, alongside astronomer Mike Brown, whose discoveries played a key role in redefining the outer solar system. Watch live on Wednesday, May 13, 2026, at noon CDT (17 UTC). The debate is on. Where do you stand on Pluto? Join the livestream and drop your thoughts in the chat. EarthSky’s Debora...