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Why was Pluto, a member of the Kuiper belt, demoted, no longer a planet according to the International Astronomical Union? Astronomer Meghan Gray takes a look at this dwarf planet's characteristics, and what makes it different from the planets of the Solar System. Learn about Pluto's surface, its moons, the origins of its name and symbol, and more. [6:33]
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- Knovation Readability Score: 1 (1 low difficulty, 5 high difficulty)
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