Figure 8-3Orbit of Pluto (a) The high-eccentricity orbit of dwarf planet (and KBO) Pluto stands out compared to the orbits of the outer three planets. Notice how many significant events occurred on Earth during Pluto’s present orbit of the Sun. (b) Details of Pluto’s passage inside the orbit of Neptune. The two bodies will never collide. (c) A nearly edge-on view of the ecliptic and Pluto’s orbit compared to it.