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Big Bang NucleosynthesisGuy MooreBig Bang Cosmology predicts that the universe started out at extremely high temperatures. If we believe this prediction all the way back to temperatures of 1011 Kelvin (then the universe was just milliseconds old), we can use general relativity, particle physics, and nuclear physics to predict the abundances of the elements in gas which has not been processed by stars. Observations of such gas proves the predictions correct, and tells us the net abundance of matter in the universe. I will explain this physics at a beginning graduate student level.
Wednesday, February 12th 2003, 12:00
Ernest Rutherford Physics Building, Boardroom (room 104) |