Did the universe have an absolute beginning, or is it eternal?

Cypress said:
Clearly you didn't comprehend the OP. According to Vilenkin, the BGV theorem postulates that if you roll the clock backwards you eventually run up against an absolute spacetime boundary dividing physical existence from non-existence.
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This nonscientific theory is a religion, nothing more.

There is no known boundary to the Universe. There is no known 'clock' to the Universe either. Time has no meaning. There is no known 'age' of the Universe.
 
Cypress said:
That's not the right question. The question is not to ask what was happening before time. The right question is to ask why matter and energy blinked into existence out of nothing.
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It can't according to the physics that we know.
You can't create matter out of nothing, and you can't create energy out of nothing.
 
Cypress said:
The Borde–Guth–Vilenkin (BGV) theorem is a theorem in physical cosmology which deduces that any universe that has, on average, been expanding throughout its history cannot be infinite in the past but must have a past spacetime boundary.

The Beginning of the Universe​

By Alexander Vilenkin

The question remains whether the big bang was truly the beginning of the universe. A beginning in what? Caused by what? And determined by what, or whom? These questions have prompted physicists to make every attempt to avoid a cosmic beginning.

In this essay, I review where we now stand.

An Unaddressable Mystery​

The answer to the question, “Did the universe have a beginning?” is, “It probably did.” We have no viable models of an eternal universe. The BGV theorem gives us reason to believe that such models simply cannot be constructed.

When physicists or theologians ask me about the BGV theorem, I am happy to oblige. But my own view is that the theorem does not tell us anything about the existence of God. A deep mystery remains. The laws of physics that describe the quantum creation of the universe also describe its evolution. This seems to suggest that they have some independent existence.

What exactly this means, we don’t know.

And why are these laws the ones we have? Why not other laws?

We have no way to begin to address this mystery.


inference-review.com

The Beginning of the Universe | Alexander Vilenkin | Inference

Despite the perplexing questions associated with the universe having a beginning, the BGV theorem shows it must have had one. Alexander Vilenkin describes the theory of quantum creation, and why it means that the universe both could have a beginning and be uncaused.
inference-review.com inference-review.com
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The Big Bang was the beginning of the physical universe! But the Spirit universe pre-dates the Big Bang!
 
Into the Night said:
It can't according to the physics that we know.
You can't create matter out of nothing, and you can't create energy out of nothing.
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Matter/energy can be created out of nothing as long as it doesn't violate the Heisenberg uncertainty principle and occurs only over an extremely short time frame. That's exactly why virtual particles can pop into and out of existence.

I would make the philosophical argument though that virtual particles aren't really blinking into existence out of nothing - they appear and vanish according to the Heisenberg uncertainty principle, and thus are appearing out of a rationally lawful organized spacetime, not out of a true void of nothingness.
 
Cypress said:
Matter/energy can be created out of nothing
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Neither can be created out of nothing.
Cypress said:
as long as it doesn't violate the Heisenberg uncertainty principle
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No theory of Heisenberg creates matter or energy out of nothing.
Cypress said:
and occurs only over an extremely short time frame. That's exactly why virtual particles can pop into and out of existence.
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There is no such thing as a 'virtual particle'.
Cypress said:
I would make the philosophical argument though that virtual particles aren't really blinking into existence out of nothing - they appear and vanish according to the Heisenberg uncertainty principle, and thus are appearing out of a rationally lawful organized spacetime, not out of a true void of nothingness.
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Heisenberg has no theory that creates matter or energy out of nothing. There is no such thing as a 'virtual particle'.
 
T. A. Gardner said:
A better question to ask and have answered is,

If the universe originated from a single point at the "Big Bang," where is that point located?
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HERE:
3358567382_862ee447ab_b.jpg
 
T. A. Gardner said:
A better question to ask and have answered is,

If the universe originated from a single point at the "Big Bang," where is that point located?
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The universe has no center.

The big bang is often thought of incorrectly as an explosion with matter moving outward and away from a point source.

What is actually happening is that cosmic matter like galaxies aren't moving. It is space itself stretching - everywhere and all at once. Expansion and stretching is an intrinsic property of space itself, so in a certain sense everywhere appears to be the center of the universe, no matter where you observe the expansion from. .
 
Cypress said:
The universe has no center.

The big bang is often thought of incorrectly as an explosion with matter moving outward and away from a point source.

What is actually happening is that cosmic matter like galaxies aren't moving. It is space itself stretching - everywhere and all at once. Expansion and stretching is an intrinsic property of space itself, so in a certain sense everywhere appears to be the center of the universe, no matter where you observe the expansion from. .
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So, it wasn't a "Big Bang" then?
 
Into the Night said:
What the heck is a 'spirit universe'??? There is only ONE universe, or it isn't universal.
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There's the Spirit world that predates the physical universe!
It was a Spiritual event ,Satan's Rebellion that triggered
The Big Bang and the creation of the physical universe!
Explained brilliantly by Melchizedek at
Melchizedek-Files.com
 
Margot said:
There's the Spirit world that predates the physical universe!
It was a Spiritual event ,Satan's Rebellion that triggered
The Big Bang and the creation of the physical universe!
Explained brilliantly by Melchizedek at
Melchizedek-Files.com
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By that definition, there is no universe. Just a duoverse.
 
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