Friday, May 5, 2017

cosmology - What does general relativity say about the relative velocities of objects that are far away from one another?



What does general relativity say about the relative velocities of objects that are far away from one another? In particular:--


Can distant galaxies be moving away from us at speeds faster than $c$? Can cosmological redshifts be analyzed as Doppler shifts? Can I apply a Lorentz transformation in general relativity?




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