"That" Pluto Controversy (You Know The One)

If you are like me, then when you went to school, you probably learned about the nine planets in our solar system. Then, tragically, in 2006, the International Astronomical Union (IAU) set the official classification of what a planet was; and Pluto didn’t make the cut. Now, we have a controversy surrounding our favorite frozen rock. But why is this a big deal?

See: http://www.fromquarkstoquasars.com/that-pluto-controversy/

Image Credit: NASA