Redshift
An object between two objects has the light generation redshift of the sum of the gravitation of the two objects at its respective radii plus its own gravitation. That is to say all gravitation ads up to a permeation; whereby, objects with lower gravitational permeation have (smaller) bluer photon generation, and objects with higher gravitational permeation have (larger) redder photon generation.
There is a background gravitational permeation throughout the universe from close to inception (or more) to present. That background gravitational permeation is decreasing at an accelerated rate – due to energy (mass) losses and the Hubble frequency.
An object under lower total gravitational permeation will see this decrease in gravitational permeation of the universe to a larger degree than an object under higher total gravitational permeation.
So the object at a prescribed distance under lower gravitational permeation, Object A, will create bluer photons faster. An observer at a later time, due to the fact it is an accelerated decrease in the universe's gravitational permeation, is creating bluer photons faster than Object A; hence, sees Object A as having actually created redder photons relative to itself, the observer. The converse is true for the object at the same distance under higher total gravitational permeation, Object B. Object B then seems to create even redder photons than Object A.
There is then the standard Hubble expansion of the Universe. Then on top of that there may be the creation of space in high gravitation.
These are just some of the factor effecting the redshift observed.

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