- #1
jcap
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I understand that there are roughly ##N=10^{79}## nucleons in the visible Universe. This number comes from adding up the nucleons of ##100## billion stars in ##100## billion galaxies in the visible Universe i.e.
$$N=\frac{10^{30}}{10^{-27}}. 10^{11}.10^{11}=10^{79}$$
where mass of sun is ##10^{30}## kg and mass of proton/neutron is ##10^{-27}## kg.
Is there a simple way of deriving ##N## using the fundamentals of Big Bang Nucleosynthesis?
$$N=\frac{10^{30}}{10^{-27}}. 10^{11}.10^{11}=10^{79}$$
where mass of sun is ##10^{30}## kg and mass of proton/neutron is ##10^{-27}## kg.
Is there a simple way of deriving ##N## using the fundamentals of Big Bang Nucleosynthesis?
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