| The Big Bang |
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| • | George
Gamow (late 1940s) realized that running |
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| the
expansion backwards means a hot, dense early |
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| universe
that was radiation dominated, and |
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| nucleosynthesis
was possible. |
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| • | With
Alpher and Herman predicted background |
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| radiation
left over from this period, which would |
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| now
have a temperature of about 5 K. |
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| • | Penzias
and Wilson discover the background |
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| radiation
in 1965 by accident, win Nobel prize. |
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