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The History of the Universe Today Galaxy Formation Last Scattering Nuclear & High Energy Physics Inflation? Extra Dimensions? Time High Energy & Temp Anti-Gravity?*!

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Presentation on theme: "The History of the Universe Today Galaxy Formation Last Scattering Nuclear & High Energy Physics Inflation? Extra Dimensions? Time High Energy & Temp Anti-Gravity?*!"— Presentation transcript:

1 The History of the Universe Today Galaxy Formation Last Scattering Nuclear & High Energy Physics Inflation? Extra Dimensions? Time High Energy & Temp Anti-Gravity?*!

2 - Iron Gold Helium Hydrogen Uranium More tightly bound Atomic Mass

3 The remaining slides are for your information, but are above the level of this course and will not appear on tests or homework.

4 Decreasing Temperature  Mass Fraction  Nuclei in thermal equilibrium Free neutrons and protons Mostly Helium-4 Mostly Carbon-12

5 Increasing Time  (Decreasing Temperature) Mass Fraction  Species Figure: Burles, Nollett, &Turner Actual evolution of Nuclear Abundances Nuclei fall out of equilibrium, and freeze out at 75% Hydrodgen, 25% Helium

6  Extrapolating to less pollution from element production in stars.

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