Posted: Nov 16, 2020 12:11 pm
by socratus
Gravity -Time / Gravity - Space  and 4D Spacetime 
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1 - There is only one kind of ''time'' and it is gravity-time. There is only one kind of '' space'' and it is gravity- space. We live on/in Earth's gravity-time and gravity-space. For us this gravity-time and gravity-space are absolute and they have different qualities.
2 - Minkowski ( correcting Einstein SRT ) discovered another system of existence so-called '' absolute 4-D spacetime''. This 4D system doesn't have gravity. About this system Minkowski said: ''The views of space and time which I wish to lay before you have sprung from the soil of experimental physics, and therein lies their strength. They are radical. Henceforth, space by itself, and time by itself, are doomed to fade away into mere shadows, and only a kind of union of the two will preserve an independent reality.''
/ Minkowski. Sep 21, 1908./
3 - Earth-gravity reference frame and  Minkowski  non-gravity absolute 4-D  system are two different physical systems and the connections between these two system is unknown until today
 4 - The conceptions "time" and "space" are property of Gravity. Without gravity there isn't "time", there isn't "space". The discussion about "time" and "space" without concept of Gravity is tautology.
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