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Francis Nimmo. EART164: PLANETARY ATMOSPHERES. Sequence of events. 1. Nebular disk formation 2. Initial coagulation (~10km, ~10 5 yrs) 3. Orderly growth (to Moon size, ~10 6 yrs) 4. Runaway growth (to Mars size, ~10 7 yrs), gas blowoff 5. Late-stage collisions (~10 7-8 yrs). - PowerPoint PPT Presentation

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