Mike Strand wrote:
With reference to the motion of stars in galaxies differing from GTR by many tens of percent: The topic "Open Question on Quantization of Gravity" in this forum presents a possible explanation, summarized below:
Even if gravity and hence acceleration at the middle of the galaxy theoretically (according to GRT) can be infinite, the observed (measured) motion (magnitude of acceleration) is bounded above, due to the fact that we cannot measure instantaneous motion -- it has to be averaged over a finite length of time. And the longer the time over which it is averaged, the lower the bound. This could explain at least part of the discrepancy between theory and observation.
And if distance and time are quantum entities, acceleration is physically bounded above, not just because of our limitations in measuring it, which would make the existence of singularities in GTR impossible.
I would be interested in your thoughts on this explanation. It depends on velocity being bounded above by c (light velocity).
I am always sad reading such things ;) There is something that should be permanently repeated: No real physical property can be infinite and GTR has (nearly) no semantic contents. Only substantial message from GTR is The gravity spreads by limited speed. For eighty years enchanted physicists are trying to find something behind GTR. But after endless mathematical interpretations, transformations and representations of nothing they are finding nothing. Or nonsense: Singularities, empty, “expanded” space, metrics that does not meet triangular inequality… Useless, absurd findings, missing physical and health sense.
The “dark matter effect” is simple catching, carrying, rubbing of physical space by massive matter movement in galaxies. I can see the galaxies as whirls of space (with stars) toward the future :). We need something similar Maxwell equations system for gravity and inertia. The motion of matter is (more) coupled with gravity, the motion somehow influences, raises (negative) gravity, the inertia is to the gravity by similar way as the magnetism is to the electricity. Inertial motion is equivalent to the electromagnetic wave - I believe. I believe next, that applying of mentioned relations by similar way as Dirac did (calculating of electron/positron) can produce the proton/antiproton theory too…
It is my opinion (expressed rather ungainly way) concerning this topic :)