Quote:
Originally Posted by JimJast
What is the ratio of mass of the universe to its volume and how this number is calculated by the astronomers. My non professional attempt calculated from the Hubble redshift gave me (6.0+/-0.5)x10^{-27} kg/m^3 and I'd like to know how far it is from the real number. Thanks in advance.
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A couple of hydrgen moleculs per cubic yard, at best.
But if you need to go through the math for your exam, then you'll need to do do so for you're own selves.
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