‘Make Pluto a planet again’? NASA chief revives debate that divides astronomers Researchers respond to NASA head’s claim to be ready to “escalate” the issue of whether Pluto is a planet. By Davide Castelvecchi

https://www.nature.com/articles/d41586-026-01421-y Many of us are old enough to have grown up with nine planets orbiting the Sun. In 2006, however, a controversial decision within the astronomy community resulted in the official list being cut to eight, removing Pluto.