history - • Structure can begin to form Nucleosynthesis...

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All That Has Come Before…
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NOW! t=10 17 s, T=3K, d=10 -30 g/cc
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Dawn of Man t=10 17 s, T=3K, d=10 -30 g/cc (1 My ago)
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Birth of the Solar System t=10 17 s, T=3K (5 Gy ago)
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Galaxy formation t=10 16 s, T=10K, d=10 -27 g/cc (13 Gy ago)
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Dark Ages Before this, no stars. And the remnant radiation from the big bang is redshifted out of the visible, so the universe is dark!
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Era of Recombination t=10 13 s, T=3000K Origin of CMB
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Era of Matter Domination t=10 12 s, T=10000K Matter becomes the dominant form of energy. (Overtaking radiation.)
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Unformatted text preview: • Structure can begin to form. Nucleosynthesis t=10 s, T=10 10 K, d=10 5 g/cc • Universe is cool enough for atomic nuclei to form. • By the end, fusion ceases. Hydrogen, helium and trace amounts of lithium remain. t=10-6 s, T=10 13 K Era of Confinement Electroweak Unification t=10-12 s, T=10 15 K • Electromagnetic and weak nuclear force become one. Inflation t=10-34 s, T=10 26 K, d=10 70 g/cc, r=1m! GUT era Planck Era, TOE era? t=10-42 s, T=10 32 K ?? ??...
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This note was uploaded on 08/06/2011 for the course AST 2002 taught by Professor Britt during the Spring '08 term at University of Central Florida.

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history - • Structure can begin to form Nucleosynthesis...

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