According to the IAU, a planet must:
• Orbit it's central star
• Be big enough for its own gravity to compact it into a sphere
• Have "cleared the neighborhood around its orbit," meaning it is not surrounded by objects of similar size and characteristics.
OK, Pluto clearly meets the first two criteria, but can someone tell me if there are any planet-sized objects close to Pluto that would expell Pluto from planethood?
2006-08-24
14:51:31
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16 answers
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asked by
Clean Independent Energy
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