Working on a discussion Devon and I had last week, I though these last few classes we could learn about the solar system. Starting with Pluto, and how it became a planet and then not a planet. Devon wanted to know how they named it Pluto, and I told her about the contest that was held, where ultimately a school girl from Oxford, England won, with the name Pluto, the god of the underworld. In the 1970's they determined that Pluto was only about 2.5 km in size, which is slightly smaller than Mercury. This was in the 1930's. Then with the help of the Hubble telescope, we discovered that Pluto was not a planet, but just the largest piece of ice in a field of thousands of ice particles. Devon then wanted to know which planet was the fastest. I explained the velocity of the planet was a function of it's distance from the sun. Much like a magnet, the draw toward the sun brings some things closer, and they go faster - while others are farther away and go slower. This was a good class - with very good participation and focus on Devon's part.