I see the description mentions Pluto being included, but not any other dwarf planets. For example, Ceres in the asteroid belt which could replace the "Main Asteroid Belt" space location. Eris is more massive than Pluto while being essentially the same size so it seems like a worthy inclusion as well.
Also, some moons are worlds unto themselves with complex geology and chemistry. Several are even bigger than other planets! It may be worth considering adding a few of these such as Ganymede, Titan, or Europa.
