We have discussed Relativity and what Einstein, and the Relativists were trying to accomplish. Einstein never ‘discovered’ ‘Relativity’ as a theory or concept, but simply a version of it based on the work of many predecessors and contemporaries. In essence he was a plagiariser and a manipulator, or to be generous, a simplifier of other people’s work, even though his work is tautological, convoluted, issued and propagated without physical proof.
Einstein’s version of Relativity is unique in its philosophical and metaphysical application of a merged spacetime, itself based on Minkowski’s and Palagyi’s maths. This is of course one of the greatest frauds in science. Time can never be merged with space as many posts outline (examples, here, here, here).
It is absurd, nay insane, to assign a merged time and space dimension along a 4th axis, affixed to Euclid’s 3 axes, pointing nowhere; and claim that your apple (or the Earth), has its own coordinate system, occupying a unique ‘space’ within the grid; endowed with its own ‘relative time’, different than that of the orange (or our moon) sitting next to it.
Relativity is a fantasy. More here