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30
Sep 2016
Is Pluto a planet?

Depending on how old you are, you might have studied in school that Pluto is the ninth planet in our Solar System. And it was, for 70+ years, but in 2006, astronomers decided it wasn't a planet anymore and recategorized it as a dwarf planet.

Why did they do that? And what exactly is a dwarf planet? Or for that matter, what exactly is a planet?

The video below has the answers!

Video courtesy: CGP Grey

 

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