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"Planck red-shift" ?

Widdekind
in Astronomy and Cosmology

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Dividing the Planck Density (5e96), by the current Cosmic Critical Density (1e-26), and taking the cube-root, yields ~e41. Thus, at a red-shift of z ~ 1041, our Observable Universe would have been compacted to Planck Density. Is that when/where current physical theory breaks down?

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