Interesting article from Journal of Cosmology; using black hole data along with Schwarzschild's equation and average density equat, the size and mass of our visible universe plots on a logarithimic scale.
Abstract;
The 2013 Planck Survey results yielded the following estimates for mass (1.46 x 1053kg), radius (4.3 x 1026 m) and average density (4.08 x 10-28 kg/m3) for the visible portion of our universe. These mass and density numbers are for the baryonic (“ordinary”) matter portion only. These data can be plotted in close proximity (within approximately a factor of 2) to the projection lines of a logarithmic graph of calculated black hole mass vs. Schwarzschild radius and black hole average density vs. Schwarzschild radius, respectively. The Schwarzschild formula, rs = 2GM/c2, and a simple black hole average density formula, Ro = 3c2/8piGrs 2, are used to calculate mass and average density for theoretical black holes ranging from microscopic to the radius of our visible universe, and these values are plotted on the logarithmic graph.
The possible implications of these findings are discussed, including a rationale for the possibility that the largest black holes (giant “dark black holes”) may be beyond our capability to detect them. It remains to be seen whether adding in dark matter massand average density contributions to the graph would put our universe exactly on the black hole projection lines, or within the shaded territory exclusive to black holes, but the possibility of this happening is not ruled out at the present time.
http://journalofcosmology.com/JOC25/COULD%20OUR%20UNIVERSE%20HAVE%20FEATURES%20OF%20A%20GIANT%20BLACK%20HOLE%20in%20Word%20copy%202-1
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