August 16, 2006
A Planetary Definitive

Pat gets a no-prize signed by Interplanet Janet for bringing us news of the latest attempt at defining what a planet really is. What they agreed on this time would increase the number of planets in our solar system from 9 to 12, with other objects potentially being candidates as well.

The definition itself, "that an object be massive enough that gravity has formed it into a sphere and that it circles a star and not some other planet", seems simple enough. Of course, a whole bunch of astronomers are already arguing about it, probably because they didn't get a vacation in Prague to argue about obscure things nobody else cares about.

Posted by scott at August 16, 2006 09:10 AM

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