I have a Question about the big bang theory

In summary: But at the same time, the universe was still in a very early stage, and there was no element of order or structure to it.In summary, the universe did not come from matter and force. It came from energy and a high energy state.
  • #1
Daark Nova
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So. how can all the matter in the whole universe be compressed into one small little ball. all the matter in the UNIVERSE. it seems impossible. but I am sure a lot of u guys have a lot of ideas. maybe all the matter in the universe was under a great deal of force. and where the hell did the matter come from any ways. i guess that is the big question.
 
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  • #2
Try asking a question without big letters and preconceptions. Welcome to PF.
 
  • #3
Does that mean I can't answer? It's so interesting though . . .

Maybe singularities are involved: Imagine a water creature never having been exposed to ice and wondering how swimming will be affected when the temperature drops below freezing (alright, I mean frozen solid). That involves a "phase-transition" (a type of singularity) and represents an abrupt qualitative change. Perhaps that's so with the Big Bang: Questions of "matter, density, and size" loose meaning across a singularity that could involve physics different from what we've been "exposed" too.

Salty
 
  • #4
my ideas lead to : no mass = no size.
 
  • #5
Daark Nova said:
So. how can all the matter in the whole universe be compressed into one small little ball. all the matter in the UNIVERSE. it seems impossible. but I am sure a lot of u guys have a lot of ideas. maybe all the matter in the universe was under a great deal of force. and where the hell did the matter come from any ways. i guess that is the big question.

Right after the initial moment, matter did not exist; protons and neutrons did not exist, what was present was a very high energy bound state of quarks and antiquarks, but too tightly bound to interact. The unified force bosons were all massless and bound in a BEC.
 
  • #6
what does BEC mean?
 
  • #7
Daark Nova said:
what does BEC mean?
http://www.colorado.edu/physics/2000/bec/what_is_it.html [Broken]
 
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  • #8
BEC is irrelevant. As SA said, the only thing that matters is the energy level. I would only argue that even quarks cannot exist in the primoridial soup that emerged from the initial state. Push the energy level high enough, and even quarks break down.
 
  • #9
As noted above, there was no matter at the very beginning. Protons & neutrons appeared a split second after the Big Bang event and atoms didn't form for another 300,000 years or so.

So where did all the energy in the Big Bang come from? That is unknown, athough there are many speculations about it. Big Bang Theory is silent on that (it describes the universe AFTER the beginning). String Theory provides a possible explanation that is fairly popular, but it's a long way from being well proven.
 
  • #10
There is indeed one explanation within the big-bang model for the origin of energy and matter, but it is a very vague one: The universe may start with (nearly) zero energy density (nearly zero energy in a finite universe). During inflation, the inflaton, a scalar field with constant energy density, accumulates energy as the volume increases. This energy is borrowed from its own gravitational potential, increasingly negative, since space is expanding with constant energy density and therefore more energy (gravitational mass) is created. I am not sure, but I think the Vilenkin model of tunneling for the origin of the universe relies on the assumption of zero-energy initial state (this is beyond my knowledge). The whole idea is a wild speculation, since we do not know what role the principle of energy conservation plays at such stage and we also do not actually know how to properly define the energy of the gravitational field.
 
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  • #11
"So. how can all the matter in the whole universe be compressed into one small little ball. all the matter in the UNIVERSE. it seems impossible."

Personally, I think the overarching concept to hold onto is that, at the beginning of the universe, there was no matter. It was not simply compressed and under great force, it was not there at all, neither was the fabric of space. The universe was too energetic for mere matter and space to exist.

The universe as it existed 1 millisecond after the big bang had more in common with today's state of the universe than it did with the state of the universe before that. (In other words, the really weird stuff happened in the first millisecond).
 

1. What is the big bang theory?

The big bang theory is the scientific explanation for the origin of the universe. It proposes that the universe began as a singularity, a point of infinite density and temperature, and has been expanding and cooling ever since.

2. How was the big bang theory developed?

The big bang theory was developed through a combination of observations and mathematical calculations. Scientists studied the motion of galaxies, the cosmic microwave background radiation, and the abundance of elements in the universe to develop this theory.

3. Is the big bang theory proven?

The big bang theory is the most widely accepted explanation for the origin of the universe, but it is not considered to be proven. It is supported by a large amount of evidence, but there are still unanswered questions and ongoing research in this field.

4. What happened during the big bang?

According to the big bang theory, the universe began as a singularity and then rapidly expanded and cooled. As it expanded, particles and energy were created, eventually leading to the formation of atoms and eventually stars and galaxies.

5. Can the big bang be tested or observed?

Some aspects of the big bang theory can be tested and observed, such as the cosmic microwave background radiation. However, it is not possible to directly observe or recreate the conditions of the universe at the moment of the big bang, making it difficult to fully test the theory.

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