how long was pluto a planet?
Pluto has been called a planet for 76 years. In 2006, the International Astronomical Union downgraded Pluto from "planet" to "dwarf planet".
Updated on Saturday, February 04 2012 at 11:14AM EST
Source:
news.nationalgeographic.com/...
Collections:
international astronomical union,
dwarf planet,
pluto,
planet
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