今天的消息（New York Times）
Astronomers Decide Pluto Is Not a Planet
未來行星的定義將是
a celestial body that is in orbit around the sun, has sufficient mass for
its self-gravity to overcome rigid body forces so that it assumes a ...
nearly round shape, and has cleared the neighborhood around its orbit.
http://0rz.net/ad1LO
難過歸難過，不過科學還是要嚴謹啊...
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