EAS100 Lecture Notes - Lecture 7: Cretaceous, Formation And Evolution Of The Solar System, Protogalaxy

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EAS100 Full Course Notes
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13. 8 billion years old, as evidinced by background temperature and expansion. Early history is remarkebly violent t < 10^-43 s. Gravity, electromagnitism, strong nuclear force, weak nuclear force. Quarks, antiquarks dominate (too hot to form larger particles) t ~ 10^-12 s. Protons, netrons combine to form nuclei of hydrogen, helium and some other light elements t ~ 300,000y. Electrons combine with nuclei to form first neutral atoms. Temperature ~ 3,000k t ~ 1 billion years. Temperature ~ 20k t ~ 10 billion years. Formation of our solar system bigan t ~ 13. 8 billion years. Broke up or collided early in solar system history. Gives off more energy than it recieves an "almost star" Chicxulub impact marked end of the cretacious period, and also the dinosaurs. Stabalizing influcene on our rotation angle, thus, climate. Imapact with the earth with mars sized impactor (thea) (likely) Or- high spin caused chunk to rip off.

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