Why does Pluto fail the 'clearing the neighborhood' test according to the definition?
Answer
It orbits in the Kuiper Belt, a crowded region where it has not gravitationally dominated the other icy bodies.
Pluto orbits within the Kuiper Belt, a region populated by many other icy bodies that are themselves relatively large. Because Pluto shares this region and has not gravitationally dominated it, it fails this crucial test.
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Clearing the neighbourhood - YouTube
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