I hope that the visualization above has made it clear that Minkowski spacetime (3 + 1) describes the same abstract reality as does the Sphere Observer's EARLIER WORLD (2 + 2), but that Minkowski spacetime is incomplete due to the exclusion of curved spacetime, which in interstellar space is the cause of gravity and gravitational phenomena. Minkowski spacetime can therefore be considered a derivative of the EARLIER WORLD, in favour of the LATER WORLD with its Newton Mechanics.
 
The invention of Minkowski spacetime then caused gravity to be excluded from Einstein's Special Theory of Relativity. This indicates that Minkowski, who, as Einstein's well-known acquaintance, was undoubtedly aware of Einstein's absurd discovery, foresaw serious paradigmatic problems: a future theory of gravity would still be in need of an abstract "2 + 2" spacetime. Minkowski anticipated this by providing his spacetime with a curvature tensor. As a result, its 3 + 1 'relation became mathematically variable with a single-dimensional time (wikipedia), making Minkowski spacetime now applicable to areas of gravity (read:' 2 + 2'-situations) as well. Or in the words of the Sphere Observer: "Mathematically you can use the curvature tensor to choose a coordinate system that approaches the '2 + 2' but still remains '3 + 1'.

Note 38 Minkowski spacetime has since been considered a homogeneous space for the so-called poincaré group. In western physics this is the set of coordinate transformations of Minkowski spacetime that preserve their own time.

 From note.38 it can be concluded that the Minkowski spacetime is only conceived as a universal metric or 'calculation tool' to make classical calculations of spatial distances more accurate. (So, in fact, just as was previously done with Pythagoras’ theorem, but now for the areas where gravity prevails as well.)
The fact that gravity fell outside of Einstein's special Theory of Relativity because of the '3 + 1' configuration has not been a subject of discussion since then. Moreover:
there is no mentioning of an  abstract reality any longer. Nowadays, the concepts of 'spacetime' and 'space' are often mixed up making it difficult to find out that these two concepts are actually two different worlds; the earlier - and the later world.

 
In this way, the earlier world is not only integrated into Western physics because of its paradigm, which in itself is completely correct, but it is also denied. And it is precisely the latter which, in my opinion, has serious consequences. The risk of paradigmatically imposed omissions is, after all, that they are often no longer perceived as such, because education has made them 'self-evident' over the years. In my opinion this has now, a hundred years later, resulted in the fact that it hardly if ever occurs to Western physics that there is an abstract earlier world. An earlier world that has contributed to the fact that the physics of the later world, i.e. Newton mechanics, has become much more reliable and has proved to be very important. Because of this collective 'forgetting', it has become extremely difficult to verify the Sphere Observer's theory with Western findings.

 

For completeness’ sake, and as an addition to substantiating my assertion that 'making the private course of time relative' has been Einstein's concession to Newton Mechanics, I will continue by giving a summary of the emergence of modern gravity theory. After all, this is also based on the timelike part of the earlier world.

Continue to: 5.4. Contemporary theories of gravity

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