The special case of 1: 1 resonance ( between bodies with similar orbital radii ) causes large Solar System bodies to eject most other bodies sharing their orbits ; this is part of the much more extensive process of clearing the neighbourhood, an effect that is used in the current definition of a planet.

The special case of 1: 1 resonance ( between bodies with similar orbital radii ) causes large Solar System bodies to clear the neighborhood around their orbits by ejecting nearly everything else around them ; this effect is used in the current definition of a planet.

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