Does Space Compressibility Affect the Big Bang?

In summary, the Big Bang is the explosion of space itself and there was no pre-existing material or space to hold it. This concept aligns with general relativity but may seem unfamiliar in our daily lives where geometry is Euclidean and physics is Newtonian. The connection between space density and mass/energy is a topic worth exploring, and there may be readable books on models of space-time. It is also worth considering if variations in space density are as valid as curved space in explaining phenomena.
  • #1
Puma
57
5
I was asking some Big Bang related question on Reddit and someone replied

"The big bang is an explosion of space itself. A shock wave requires an explosion propagating into pre-existing material.

Not only was there no pre-existing material, there was no pre-existing space to hold it.

This all makes sense in general relativity, but is somewhat alien to our terrestrial existence where geometry is Euclidean and physics is Newtonian."

I was not aware that there is a formula connecting space density to mass and energy? I would like to read more about this if it exists and would like to know if there a readable book on models of space time?

Are variations in space density in your opinion just as viable as curved space? Eg would all phenomena be explicable with such an alternative model.

Thanks in advance
 
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  • #2
Puma said:
re variations in space density in your opinion just as viable as curved space?
Curved space means that there is more or less space in a sphere of a given circumference than in flat space. Is that what you mean by "variations in space density".
 

1. How does space compressibility affect the Big Bang?

Space compressibility refers to how the fabric of space can stretch or shrink due to the presence of matter and energy. In the context of the Big Bang, it is believed that space was highly compressed before the rapid expansion that occurred during the event. This expansion, known as inflation, is thought to have been caused by an intense burst of energy in the early universe. Therefore, space compressibility played a crucial role in the Big Bang by allowing for the rapid expansion and subsequent formation of the universe.

2. Can space compressibility explain the singularity of the Big Bang?

The singularity of the Big Bang refers to the point of infinite density and temperature from which the universe is believed to have originated. While space compressibility may have played a role in the rapid expansion of the universe, it cannot fully explain the singularity. The laws of physics as we know them break down at this point, and scientists are still trying to understand the true nature of the singularity.

3. Does space compressibility affect the rate of expansion of the universe?

Yes, space compressibility can affect the rate of expansion of the universe. In the early universe, the high energy and density caused by the compression of space led to a rapid expansion. However, as the universe ages and matter becomes more spread out, the effect of space compressibility on the expansion rate becomes less significant. Other factors, such as dark energy, also play a role in the rate of expansion.

4. Is there evidence to support the role of space compressibility in the Big Bang?

While there is no direct evidence for space compressibility in the Big Bang, there is evidence that supports the theory of inflation, which is closely related to space compressibility. The observation of cosmic microwave background radiation, the leftover heat from the early universe, is consistent with the predictions of inflation. Additionally, the distribution of galaxies in the universe also supports the idea of a rapid expansion in the early universe.

5. Can space compressibility change over time?

Yes, space compressibility can change over time. In the early universe, the high density and energy caused by the compression of space led to rapid expansion. As the universe ages and matter becomes more spread out, the effect of space compressibility on the expansion rate becomes less significant. However, the overall compressibility of space is still believed to play a role in the ongoing expansion of the universe.

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