Abstract
Abstract We investigated several cases of migration of celestial bodies (planetesimals, forming planets, asteroids, and transneptunian and near-Earth objects) in the forming and present Solar System. These investigations were based on computer simulation results and on some analytical estimates. The evolution of orbits of several gravitating objects mainly was investigated by numerical integration of the N-body problem. The method of spheres (i.e. two two-body problems) was used for investigations of the evolution of discs consisting of hundreds bodies. It was found that the embryos of Uranus and Neptune may have originated near the orbit of Saturn and then due to gravitational interaction with migrating planetesimals may have migrated to their present distances from the Sun moving all the time in orbits with small eccentricities. Under the gravitational influence of the giant planets, some transneptunian bodies can decrease their perihelia from 34 to 1 AU in several tens of million years. Some bodies of ...
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