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planet migration
A major shift in the orbit of planet. This could be caused by the collision or near-miss of another sizable object, or interaction with the dust of a protoplanetary disk. Most planet migration is likely to take place in very young planetary systems (see planetary systems, formation) and is the favored explanation for the small orbits of most extrasolar planets found to date (see inward orbital migration).
Related categories
• EXTRASOLAR PLANETS AND SUBSTELLAR OBJECTS• PLANETS AND MOONS
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