Why we need a new definition of the word 'planet'

Is it time for a new definition of "planet"? UCLA astronomer and planetary scientist Jean-Luc Margot says the answer is yes. The current definition was decreed by the International Astronomical Union just nine years ago. The problem is, it applies to only bodies within our solar system. Margot...

via L.A. Times - Science http://ift.tt/1PGHUND