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Snip3r
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In the distant past at bigbang the universe was very hot and dense. Can i say it was dimensionless then? If so did it come to this 3 dimension through 1 and 2?a little more speculation... is/will it go to higher dimensions?
There are a range of models for this "period" and they don't all have a singularity(? someone correct me?) or, even, a beginning.
Naty1 said:i haven't come across cosmological models with higher dimensions, but I would not be surprised to see some. A number of de Sitter based spacetime models suggest that the universe evolves so as to increase entropy. And that seems to lead to a rather flat universe devoid of anything except the current 3+1 dimensions. cold,dark,empty.
Well, the Ekpyrotic model of Steinhardt/Turok is a higher dimensional model,
In the distant past at bigbang the universe was very hot and dense.
Spontaneous Inflation and the Origin
of the Arrow of Time
Sean M. Carroll and Jennifer Chen 2004
http://arxiv.org/pdf/hep-th/0410270v1.pdf
My quick summary:
According to everything we know about gravity, large curvatures are entropically disfavored, tending to ultimately smooth themselves out under ordinary evolution.
our proposal imagines that there do not exist any maximum-entropy equilibrium states, but
rather that the entropy can increase from any starting configuration
The Big Bang in our past is not a unique moment in the history of
the universe; it is simply one of the many times that inflation spontaneously began
with fractal distribution of pocket universes to the far past and far future. [Those which
expand forever are far more likely to lead to the origin of other universes.]
...if “empty space” is not a perfectly stable state, but rather is subject to instabilities that can produce universes like our own. A mechanism for such an instability may be provided by quantum fluctuations in a nearly-empty universe [associated with small positive cosmological constant] and an appropriate inflation field.
I am not personally overwhelmed by the force of the logic, but the scope of the discsussion [not a lot of math] and insights is fascinating.
Well you are not the OP :)Xyooj said:i was thinking more in line with
our dimension, spirit dimension, etc... :)
You seem to be using the word "dimension" in a way that is not usual in physics ... beware of confusing technical with common terms.we are able to understand our dimension better perhaps because we are created from the matter in our dimension. inter-dimensional beings are made with matter in those dimensions?
Snip3r said:In the distant past at bigbang the universe was very hot and dense. Can i say it was dimensionless then?
If so did it come to this 3 dimension through 1 and 2?a little more speculation... is/will it go to higher dimensions?
The dimensions of the universe refer to its size and extent in space. The current prevailing theory suggests that the universe is three-dimensional, meaning it has length, width, and height. However, some theories propose the existence of additional dimensions beyond the three we are familiar with.
The size of the universe is measured in terms of its observable distance, which is constantly expanding due to the expansion of the universe. Astronomers use units such as light-years and astronomical units (AU) to measure the vast distances in the universe.
Yes, scientists use various methods such as studying ancient light from distant galaxies, analyzing cosmic microwave background radiation, and observing the motion of celestial bodies to explore the past of the universe. By studying these phenomena, scientists can gain insights into the history and evolution of the universe.
There are various theories and models that scientists use to speculate about the future of the universe. These include the Big Crunch theory, which suggests the universe will eventually collapse in on itself, and the Big Freeze theory, which predicts the universe will continue to expand and eventually reach a state of maximum entropy.
The number of dimensions in the universe affects our understanding of its physical laws and properties. For example, some theories suggest that the existence of extra dimensions could help explain mysteries such as dark matter and dark energy. Additionally, the concept of dimensions plays a crucial role in our understanding of the fabric of space-time and the nature of gravity.