Tokyo Tech-led study shows how icy outer solar system satellites may have formed

Beyond the orbit of the planet Neptune, there are a multitude of icy and rocky small bodies, smaller than planets but larger than comets. These likely formed at the same time as the Solar System, and understanding their origin could provide important clues as to how the entire Solar System originated. Using sophisticated computer simulations and observations of TNOs, a Tokyo Tech-led team has shown how these so-called trans-Neptunian Objects (or TNOs) may have formed.