Poor Pluto, confused or clarified

I find it really interesting to follow what is going on with poor Pluto, being downgraded from planet, to dwarf and now… rock? It seems that just as any other paradigm shift that science goes through there is a fair amount of passion as well as a fair amount of science to define in the new terms what was clear before – we confuse to clarify.

Thanks to Mathias for the great image.