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Using the currently accepted values of the cosmological parameters, and assuming the validity of the CDM...

Using the currently accepted values of the cosmological parameters, and assuming the validity of the CDM Model (what Ryden calls the Benchmark Model), (a) determine the total baryonic mass in the observable universe (that is, within the particle horizon). Express your answer in solar masses, and also in number of baryons, and finally in joules. (b) Do the same for the total amount of dark matter, expressed in solar masses. (c) Calculate the total energy of CMB photons in the observable universe.

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