From the September 1999 Scientific American Magazine | 0 comments

Migrating Planets ( Preview )

Did the solar system always look the way it does now? New evidence indicates that the outer planets may have migrated to their present orbits

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September
1999 Issue
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In the familiar visual renditions of the solar system, each planet moves around the sun in its own well-defined orbit, maintaining

a respectful distance from its neighbors. The planets have maintained this celestial merry-go-round since astronomers began recording their motions, and mathematical models show that this very stable orbital configuration has

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