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Density of the Universe

`rho_"(Universe)" = 3 X 10^-28 (kg)/m^3`
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This equation provides an estimate of the mass desnity of the observable universe.

According to an article posted on the University of Massachusetts website  1 , "the mass density of visible matter (i.e., galaxies) in the Universe is estimated at `3 X 10^-28 "kg"/m^3`.

  1. ^ Mass, Size and Density of the Universe