I don't get it. In what way is Pluto "the last large body in our solar system"? Eris is larger and further out. We need to accept that we don't have nine planets. Nine doesn't make any sense. We either have eight planets (MVEMJSUN) or we have at least thirteen (MVEMJSUN, plus Ceres, Pluto, Eris, Haumea, and Makemake). If you feel you need to include Pluto, you should include the other dwarf planets. We even have better images of Ceres than we have of Pluto.