I'm concerned with looking for these 'accelerating expansions,' and I must have shown you ten already... Can you show me one?
Peter, this thread is in the Pseudoscience folder so you can present pretty much any idea you like. That does not mean that there will be no one who questions your logic or the source of your information, from a scientific point of view.
Every example that you have suggested it seems to me requires some compression preceding the decompression and expansion. It fits well with everyday experience, but it from what I can tell has very little to connect it to the universe generally.
I guess you could say, from a completely naive interpretation, that the big bang followed a highly compressed state, which led to a rapid even accelerating expansion, but even that is terribly flawed, as far as science is concerned.
Attempting to explain the accelerating expansion of the universe as being the work of some massive black hole, just does not make any sense. For one thing the universe appears to be expanding in all directions and at an accelerating rate. For a black hole to be responsible for that, it would have to be larger than the universe and hollow with the universe inside it. Such that the shell of a black hole was accelerating the universe.., apart and toward that shell....
If the black hole were at the core or center of the universe, we would not be seen an associated accelerating expansion. Instead we would be seeing everything moving toward the black hole and the distances would be getting smaller not the other way around.
None of this makes any sense. You cannot explain the things we see happening at cosmological scales by what happens, as compressed air escapes through a small opening.
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When observations of redshifted light suggested that galaxies were moving away from one another, and perhaps over great distances, even at velocities that could approach and/or exceed the speed of light, the best explanation within the context of the best descriptive cosmological theory we have, is that it is space itself that is expanding. A little bit everywhere, in a manner that over very great distances the velocity of that expansion becomes observable in the redshifting of light from distance sources.
When observation, fairly recent as these things go, suggested that that expansion of space was actually speeding up, the concept that some sort of dark energy, meaning unknown and previously unmeasure energy, was opposing gravity in the deep dark regions of space between galactic clusters, such that instead of being drawn together under the influence of their mutual gravities, they apear to be being driven apart at an accelerating rate. The cause, as the name dark energy suggests is yet unconfirmed. Meaning no one knows why or how just that this appears to be what is happening.
These have been watered down attempts to describe what appears to be happening at very large scales, in a lay oriented manner.
Since this is a discussion in pseudoscience, on more than one occassion I have been tempted to toss out some wild fringe based explanation. I have resisted, mostly because even though it is in pseudoscience, it seems that you and a few others are taking the discussion seriously, and I am reluctant to add fuel to a fire that does not appear to me to be leading anyone to a greater understanding or insight into the underlying dynamics involved.