Mass of the Universe

$M_"(Universe)" = 6 X 10^51 kg$

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This equation provides an estimate of the mass of the observable universe.

According to an article posted on the University of Massachusetts website ^{lightyears) plus or minus 20 percent or so". This translates to a mass of $6 X 10^51 kg$ , which is equivalent to the weight of $4 X 10^78$ hydrogen atoms.}

^ Mass, Size and Density of the Universe