Why was Pluto reclassified as a dwarf planet in 2006?
Answer
It failed to clear its orbital neighborhood
The International Astronomical Union established three criteria for a planet: it must orbit the Sun, it must have sufficient gravity to be spherical, and it must have cleared its neighborhood of other objects. Pluto resides in the Kuiper Belt, a region densely populated with other icy debris and celestial bodies, meaning it has not cleared its orbital path, leading to its reclassification as a dwarf planet.

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