"the world's largest permanent scale model of the solar system. " Right, last I heard our continents move. Yes this wont change tomorrow or any time soon, but its still not permanent. Not so long ago (whats 250 million years in respect to the universe) all the continents where connected: http://www.newgeology.us/Pangea.png

I'm not trolling, its just not permanent. Anyway I love that Pluto is there. It will always be a plant to me even though it was dropped from our solar system.