Right, and what the late Halton Arp claims is that there is an association between high redshift objects and galaxies with a much lower redshift. Logically, if the redshift can be translated into distance away, that cannot be possible. Halton Arp's followers believe that Hubble's 'law' is not responsible for these high redshifts.
Incidentally, HA was a former student of Hubble - not just a nobody. If that association is valid, astronomy is in big trouble because distance measurements - particularly large ones - may be grossly incorrect!
David
Distance, measured as a function of light emission, is an indirect measurement. It is easy to think of "distance" as an absolute, because in our physical spaces we can directly detect distance with a tape measure. Space/Time is said to be fabric-like. In cosmological "distance" how much are they waving and warping, we just don't understand.
Add to that; the use of a calculus of red-shift correction to get a "true" distance - is like-wise very flexible and may have a very large margin of error. Thus, increasing the blurriness of the picture, rather than clarifying it. That inter-galactic distances could be highly inaccurate is to be expected.
Arp appears to be a data-collecting guy, as much as a theorist and therefore, my kinda guy. There is something not correctly modeled about quasars and to your point, there are perceived problems with relying on a red-shift method of distance approximation, thinking it is a physical property, rather than a heuristic.
However, the CMB is a natural phenomenon and it is data-laden. It speaks to a idea of a dramatic moment in the physical history of the universe. It is not a theoretical event. It is not a thought-experiment. Does CMB + relativistic equations = BB? I am sure not qualified to comment on whether its right or wrong. I am very positive as to the analysis of what event caused the CMB.
The CMB was created at a time in cosmic history called the Recombination Era. The universe had cooled to a temperature of about 5,000 degrees Fahrenheit (2,700 degrees Celsius), cool enough for electrons and protons to “recombine” into hydrogen atoms. Photons were released, and today this radiation is called the CMB.
Before the CMB there was no physical processes as we know them, without the elementary particle exchanges creating radiation. The birth of escaping photons marks physics starting, IMHO. My informational realism comment to that is: BEFORE the CMB there were non-zero values for a probability wave (information object) that could "collapse" into physical light @ a fixed speed. Maybe there was 10 - or "10 to the 10 "- universes in superposition - who knows. But; this one has light because before there was light was a real-world probability for light.
