- The Principal Investigator of New Horizons, Alan Stern, says Pluto is a planet. "I think the IAU really embarrassed themselves with this...Earth at the same distance from the sun [as Pluto] would not be a planet by the IAU’s measure, because Earth can’t clear that zone either." http://www.space.com/12710-pluto-defender-alan-stern-dwarf-planet-interview.html 75 comments space
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