Comment on Pluto my Beloved
slazer2au@lemmy.world 5 weeks ago
In his time Ceres was also a planet so there were more then 9.
Comment on Pluto my Beloved
slazer2au@lemmy.world 5 weeks ago
In his time Ceres was also a planet so there were more then 9.
marcos@lemmy.world 5 weeks ago
It wasn’t, though. The planets were basically defined as “it’s those 9 there”.
People only started to push for a property-based definition when we started finding exoplanets. And only really moved into it when a 11th candidate was found and there were some 3 or 4 more possible ones.