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NASA scientists say Pluto is planet again! Possibly - Geek Reply

Well, it looks like Jerry might have been right all along. Astronomer and new found hero to Pluto fans everywhere, Dr. Will Grundy, is making the case to redefine what we mean when we say “planet”. This would have the happy the coincidence of once again handing Pluto the coveted title of Planet.

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Haurus233d ago

Great, so now comets and meteors are considered planets, so long as they are round enough. One dumb definition exchanged for another dumb definition. Stars do not even have any minimum defined size, making this new definition unusably vague.

They should add in the requirements that the object be large enough to have its own gravitational field and that it is in a permanent orbit around the sun.

** “A planet is defined as a celestial body that (a) is in PERMANENT orbit around the sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) is smaller than xxx (Representing the minimum defined size of a star).” This would require said minimum size to be determined first. Simple changes for a practical definition.

clinical233d ago

I would consider some even smaller objects planets, but not the moon because it's a moon. Tough call, not exactly an important distinction though