BTW, there is more interesting features of the "dynamical friction of photons" than just producing a large Hubble type redshift. It produces also an illusion of accelerating expansion with characteristic that happen to be observed. I don't know how closely it is observed, I recon within 10% but I might be wrong, being wrong so many times. It might be to 1%, how do I know.

Another interesting (to me) feature is that this "dynamical friction of photons" produces large redshifts in relatively dense clouds of dust or gases which according to my poor knowledge of astrophysics might surround quasars. But it should rather interest Halton Arp than me.

What interests me though is the mechanism of this "dynamical friction of photons" since it can't be the infamous "tired light effect" since in Einstein's gravitation no gravitational forces act on photons. So I figured out that it must be the effect similar to "gravitational redshift", simply the time running slower the farther into space we look. And the effect is coupled to the curvature of space (as the calculations reveal) in such way that it makes spacetime flat (in the sense of scalar curvature only of course, since the space is still curved and the time is dilated; they just fit one another making flat the sum of both, the spacetime).

An interesting paradox, that the time is running everyplace slower than everyplace else in the universe I leave for curious characters to solve. The sufficient solution is to demonstrate that it does not cause a logical contradiction. Solution is surprizingly simple, just one more Einsteinian paradox, this time in the general relativity. Who solves it first gets as an award a short explanation of mechanism of gravitational force in Einstein's gravitation which most people don't know or don't want to believe, but it is even more interesting than the mentioned temporal paradox. It demonstrates also that Einstein's gravitation is already a quantum theory and photons might be its bosons (which might be of course also wrong as everything else what originated in the demented mind of JimJast).