Pluto's demotion: The real reason it's not a planet anymore
3:14
MSNToday In The Space World
Pluto's demotion: The real reason it's not a planet anymore
For decades, Pluto was our solar system's ninth planet. This video explains the scientific journey that led to its controversial reclassification in 2006. We break down the International Astronomical Union's three strict criteria for planethood and reveal why Pluto, despite being a fascinating and geologically active world, failed to meet the ...
5 months ago
Pluto Planet Debate
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