Image: Artist's view of Kuiper belt object. Credit: NASA and G. Bacon (STSci) Kuiper Belt objects with absolute magnitude less than 3 (radius >500 km), the dwarf planets, have a range of different ice/rock ratios, and are more rock-rich than their smaller counterparts. Many of these objects have moons, which suggests that collisions may have played a role in modifying their compositions.
Space, Astronomy, Astrophysics, Science