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EPSC 221 (6)
Lecture

A Brief History of the Earth_summury.docx

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Department
Earth & Planetary Sciences
Course
EPSC 221
Professor
Pappas- Maenz
Semester
Fall

Description
cloud starts to contract under A Brief History of the Earth influence of gravity 1. The origin of our solar system and planets -rotation speeds up Large explostion sebt all Debrits start to cool -cloud flattens into maters at incredible dowmthe milky way disc shape speed galaxy forms 14 billions 5 billions Matter in the middle Big bang Nebular hypothesis : a accumulate to form the rotating cloud of dusts and “protoSun” gas forms in the milkey way  solar nebula End of gravitationnal heating disk around sun cools, condenses -planetesimals (km-scale) form and start to collide and grow -discrete planets (and moons) form
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