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At what cosmological redshift z, does recession speed equal the speed of light? How is it calculated?

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At what cosmological redshift z, does the recession speed equal the speed of light?

What equations are used to calculate this number (since at large redshifts, z=v/c won't apply)?

asked Dec 8, 2019 in Astronomy by riteshs (0 points) [ no revision ]
recategorized Dec 8, 2019 by Dilaton

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