This exerts cumulative forces on the other planets, disrupting the orbits of Neptune and Uranus, and flinging them outward into the cloud of planetesimals, Links of London Charms which scatter in aU directions. It takes about another 100 mUlion years for the system to calm down and reach a new state of equilibrium, which is very different from the previous one. Because Neptune was closer to the JupiterSaturn conjunction Links of London Bracelets, its orbit has been disrupted the most, and its orbital radius has increased by about a factor of two. Uranus has also moved to a larger orbit, which is now inside the orbit of Neptune but further from Saturn than before. But the biggest effect has been on the outer cloud of planetesimals. They appear to be gone. They have been largely dispersed. There are a few planetesimals now in stable orbits outside the orbit of Neptune, and these form die present Kuiper Belt sweetie Bracelet. However, most of them have either colUded with the major bodies of the Solar System or have been ejected from the System altogether. Their disruption has sent many high-velocity objects into the inner Solar System, accounting for die Late Heavy Bombardment described above. Thus, the Nice model explains the Kuiper Belt, the formation of Uranus and Neptune, die low mass of Uranus, the late Heavy Bombardment of the inner planets, and the origins of the Trojans, die irregular moons, and the asteroid belt Links of London.
January 19, 2010
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