Being "largely spherical" is (post-Pluto furore) a necessary but not sufficient condition for being deemed a planet. http://en.wikipedia.org/wiki/Definition_of_

Being "largely spherical" is (post-Pluto furore) a necessary but not sufficient condition for being deemed a planet. http://en.wikipedia.org/wiki/Definition_of_planet http://en.wikipedia.org/wiki/Definition_of_planet