Why Isn't Pluto a Planet?

Why isn’t Pluto a planet anymore? And what is a planet anyway? Astrophysicist Jackie Faherty explains!

If you’re more of a dinosaur person, check out “Why isn’t Pterodactyl a dinosaur?” here: Why Isn't Pterodactyl a Dinosaur?

#Pluto #Planet #DwarfPlanet #KuiperBelt #SolarSystem #Astronomy #Explainer #Museum #AmericanMuseumofNaturalHistory #HaydenPlanetarium

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