The Color of the Night

Light coming from remote galaxies is redshifted and it is accepted that redshifts are produced by every galaxy running away from each other in a partic-ular manner. According to this theory, galaxies can be grouped by the distance to earth in four spaces: the closer ones with no acceleration, the next ones with acceleration, the next remote ones with deceleration, and the farther ones without characterization. All that complexity is disregarded in this paper by assuming that the photons are ruled by longitudinal and transverse gravitational potentials. These relativistic invariant potentials create coherence quantum states of energy and subsequently the light redshift is created by photons moving down across those energetical levels.


Introduction
People first assumed that heaven was eternal, and nobody was expected signals from the past. Penzias and Wilson [1] in 1965 reported a rare radiation coming from space. Sciencemen as Alpher, Herman, Zel'dovich, Dicke, Doroshkevich, and Novicov are mentioned in [2] to have been working with the prediction and detection of a signal relate to the entire universe. Then, it was logical that the predictions in [3] [4] [5] where correlated with the experimental observations of Penzias and Wilson. In the same period, Hubble discovers [6] that light coming from all far galaxies has a redshift proportional to its distance to us. That redshifted was interpreted as a Doppler's effect [7] according to galaxies flying away from each other with a speed proportional to its distances. All mentioned before correlated well within a theory that is known today as the Big Bang (BB). See for example [8]. Anyway, some science-men as Arp [9] and Mitchell [10]  The determination of the so-called Hubble's constant H 0 indicates in 2020 that something could be wrong. That constant is correlated with the universe expansion rate according to Riess [11]. The Shahib's et al. [ [14].
In [15] was introduced the idea that photons because the potential of interaction between them, can develop a coherence condition characterizes with quantized energetical states. The idea of light going down on those energetic levels during traveling can be used to explain the three regions of space that are been characterized now with a null acceleration, a positive acceleration, and a negative acceleration [11]. It is this paper is about balancing an apparent complex young universe versus a long existing simple universe were traveling light mature with time. According to this point of view, the oldest light can be identified with the CMB.

Energetic Photons-Second Part
This paper is about an important consequence of the model introduced in [15].
There, the Dirac's method [16] was used to cover gravitational interactions between photons. The energetical result in [15] called Equation (12) is reintroduced here as Equation (1) were E being the photon energy at time τ, m the photon rest mass, φ the gravitational potential, τ 0 half of the inverse of the Hubble's constant H 0 , c the speed of light, and Λ the universal limit speed. The Dirac's method adapted to gravity required the speed of light to be lower but extremely close to the limit speed.
Defining redshift z as z = E 0 E −1 − 1, where the energetic fraction according to were τ = τ 0 + t T , τ 0 = (2H 0 ) −1 , and the time of traveling t T = dc −1 , if d is the distance traveled. Then, the universal redshift z becomes, Equation (4) outputs around 4 × 10 −68 kg photon mass. All PMUL values mentioned above make feasible the photon mass stated in this paper.

Conclusion
The known universe is seen as having closer galaxies running away with constant velocities proportional to its separations, intermediate galaxies with accelerating velocities, farther galaxies with decelerating velocities, and a universal explosion followed by an inflation from where is detecting a CMB radiation.
That opinion is created by the properties of the radiation coming from those galaxies and its surrounding space. Same properties are explained here by a unique Optics and Photonics Journal idea. All the universal experimental information available to us now is consistent with the coherence state of light that forces photons to discretely loss energy during its traveling.