Friends, in my opinion, the theory of Relativity is a heap of contradictions, but it has many followers to who it is interesting.
We can study many of the parts of its postulates and check the contradictions between them, but here we are going to deal with a surprising point due to its incongruity and persistence in current physical theories.
It is the dilation of time at the speed of light.
Many points can be exposed that demonstrate its inconsistency, but we will see two only in this thread or article.

1.- Application of the Lorentz transformation. .
The Lorentz transformation tries to measure the time dilation that an observer contemplates: Yes, but that is only true if the object moves away from the observing observer in a straight line.
But if the object or astronaut what he is doing is approaching the observer what happens is the opposite, that the astronaut seems to age quickly because the speed of light reaches him added to the speed that the astronaut brings.
Therefore he ages quickly, or if we want, time contracts instead of lengthening.
Therefore, the Lorentz formula would have to be changed to adapt it to any direction of movement with respect to the observer. .
I have simply applied the Cosine of the escape or incidence angle (positive or negative).

2.- Time of observation (the one that the observer perceives) and local times (those that the observer and the astronaut have in their position). .
As is logical, the local times are the same for both the observer and the astronaut, (over which I do not speak because relativism seems to accept it this way) those that not fit or they are distorted are the times that are observed, both by the subject on earth, as on the part of the observer.
But these observed times are false because they are distorted by the medium of emission or speed of light (that is, they are captured long after being emitted).
But, and here is the question, why we look at the observation time if they are falsified, and we know that both in us and in the astronaut what influences are the local times of each one, (which are the same)
Our local time is that it moves all our biological functions and gives us aging.
The time that we observe in the astronaut does not influence us at all, and vice versa, the time that the astronaut observes does not influence him either.
But also if we add the time dilation observed when going and the contraction observed when coming, we see that it also gives us the local time accumulated by the astronaut, and that it is equal to ours.

Roderick, Wojtek, M.Nisa, John, Latha,

In my cosmic and atomic model I express an specie of principle or postulate that expresses the relationship between the universal Time that is stationary, and the local times, which guarantee the property of simultaneity.
This principle would be:
"For two or more local frames of reference (of space and time) and located at any distance from each other, there is always a large superior frame of reference that contains and encompasses all these local frames of reference and for which there is a space and stationary and common time that gives them the qualities of simultaneity, presents, past, and an expected common future also with property of simultaneity"
For example, the earth and the different frames of reference that the earth contains.

Time on earth is measured by its rotation, and this time is divided and measured in: years, days, hours, minutes, seconds.
Well, if we take any second of this terrestrial rotation, in all the places and reference frames of the earth infinite events are taking place that are all simultaneous with each other because they take place in that chosen second.
Therefore, the space-time of the universe is stationary and in it infinite local reference frames are produced, but which have simultaneity with all the others.
Of course we are not able to observe them all. And if we observe some, possibly their observation is distorted by the speed of light observation medium.
But the fact that we cannot observe it correctly in its entirety does not mean that there is no simultaneity that the logic about the behavior and structure of space-time indicates to us.
Make no mistake ourself, we are a speck of dust in the Cosmos that does not influence its structure or functionality at all.
Our observation and nothing is the same.