Did space time be created at the Big Bang?

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Discussion Overview

The discussion centers on whether spacetime was created at the Big Bang and the implications of this for gravity and events preceding the Big Bang. It explores theoretical concepts related to the Big Bang Theory, the nature of singularities, and the universe's potential infinitude.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants propose that if spacetime was created at the Big Bang, then gravity may not be a fundamental force associated with it, leading to undefined events before the Big Bang.
  • Others argue that the Big Bang Theory describes the evolution of the universe after a singularity but does not clarify what the singularity was or how it originated.
  • One participant notes that there is no evidence supporting various "creation theories," including bounce theories, and emphasizes the lack of understanding regarding the universe's inception.
  • Another participant questions the meaning of "the singularity," suggesting that if the universe is infinite, it must have always existed, thus challenging the concept of a singular starting point.
  • It is mentioned that extrapolating mathematical models backward leads to unphysical answers at "t=0," which is the basis for the concept of "one Planck Time later" in the Big Bang Theory.
  • Some participants acknowledge that if the universe is infinite, it must have always been infinite, but they also recognize the uncertainty regarding whether the universe is finite or infinite.

Areas of Agreement / Disagreement

Participants express multiple competing views regarding the nature of spacetime, singularities, and the universe's infinitude. The discussion remains unresolved with no consensus reached.

Contextual Notes

There are limitations regarding assumptions about the nature of the universe, the definitions of singularities, and the implications of mathematical extrapolations. These aspects remain unresolved within the discussion.

Quds Akbar
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Did space time be created at the Big Bang, if it did, then theoretically, gravity would not be a fundamental force associated with the Big Bang and any events before the Big Bang would be undefined?
 
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Quds Akbar said:
Did space time be created at the Big Bang, if it did, then theoretically, gravity would not be a fundamental force associated with the Big Bang and any events before the Big Bang would be undefined?
The Big Bang Theory is a theory of the evolution of the universe since one time after the singularity. The singularity is what you are referring to and the Big Bang Theory is silent about what that was and how it might have come about.

There is no evidence for ANY of the many "creation theories" including those that are "bounce" theories. We have no idea how the universe came into being.

At one Plank Time, all four of the fundamental forces were united into a single force, which eventually broke off one after another until there were four separate forces.

"Before the big bang" is not a meaningful phrase inside of The Big Bang Theory.
 
phinds said:
The Big Bang Theory is a theory of the evolution of the universe since one time after the singularity. The singularity is what you are referring to and the Big Bang Theory is silent about what that was and how it might have come about.
What do you mean by "the singularity", I have recently realized that if the Universe is infinite then it must have always been, so what is "the singularity"?
 
Quds Akbar said:
What do you mean by "the singularity", I have recently realized that if the Universe is infinite then it must have always been, so what is "the singularity"?
If the extrapolate the math backwards you find that at what is called "t=0" or "the singularity" is the place where the model blows up and gives unphysical answers. That's the basis for the "one Plank Time later" on which the Big Bang Theory is based.

Yes, if the universe is now infinite they it has to have always been infinite, but it is unknown whether or not this is the case. If it is finite, it is unbounded. That is, there is no center and no edge and according to current best estimates if it is finitely it is orders of magnitude larger than the Observable Universe.
 

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