Mercury, Venus, and the Rest?

As a student I only had to remember the name of nine planets in our solar system. I managed to remember all. Currently almost 2,500 astronomers are meeting in Prague and working on a definition for what a planet really is. There is a chance we could end up with twelve planets, dozens more, or maybe just eight! If changes occur we'll be sure to update our Solar System Explorer Gizmo the following day.