Monday, February 14, 2011
Demoted
This used to be a planet. from 1930 to 2006. Then it was 'demoted,' it's now in a new category, 'dwarf planet,' since it didn't meet the new 2006 planet requirements (orbit around Sun, cleared its neighborhood, and has sufficient mass to assume a nearly round shape) - in fact, many recent objects of Pluto's size were discovered, and if we hadn't declassified it, we'd have far too many obscure planets.. Or something like that.. Pluto has two known smaller moons, Nix and Hydra, discovered in 2005. So there..this entry's permalink
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