| Clearing
of the Nebula |
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| • | Radiation pressure
(pressure of light) |
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| – | Will see present day effects in comets |
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| • | Solar Wind |
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| – | Strong solar winds from young T Tauri stars |
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| – | Will see present day effects in comets |
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| • | Sweeping up of debris into planets |
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| – | Late Heavy Bombardment |
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| • | Ejection
of material by near misses with planets |
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| – | Like
“gravity assist maneuvers” with spacecraft |
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| – | Origin
of the comets |
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