Pluto is a bit of a loner. The dwarf planet is no longer considered a regular planet; it does not orbit on the same plane as the solar system's eight planets; and its orbit is both highly elliptical and extremely tilted.
In fact, its orbit is much more similar to that of its neighbors in the Kuiper Belt, a doughnut-shaped region beyond Neptune's orbit that's also home to other dwarf planets like Makemake and Eris, as well as millions of icy objects. But even compared with the rest of the objects in the Kuiper Belt, Pluto's orbit is peculiar.
