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Lecture 23

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Department
Origins
Course
ORIGINS 2B03
Professor
Laura Parker
Semester
Fall

Description
Lecture 23Tuesday November 08 20111230 PMBig Bang Nucleosynthesis BBNElectronsProtonsNeutronsALL INTERACTING AND COLLIDING FURIOUSLYPhotonsThe universe was so hot that nuclear fusion was happening everywhere only lasted a few minutesWhen this sea ended all that was left were hydrogen 90 helium 10 and photonsThe nuclei capture the electrons and form atomsCausing light to travel freely no scatteringThe photons we see todayWMAPThe CBR surface of last scatter is analogous to the light coming through clouds to our eye on a cloudy dayWe cant see the big bang because of scatteringThe fluctuations from the early universe are 12x smallerIn these diagrams the Milkyway galaxy always comes in the way across the middleBig bang is a hot early universe that expands and coolIf you go back in time you will see that atoms are not foun
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