Big Bang Implosion: The Symmetry of Cosmic Expansion and Collapse

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SUMMARY

The discussion centers on the relationship between cosmic expansion and collapse, specifically the concept of the "Big Crush" in relation to the Big Bang. It emphasizes that the Planck length (L*) serves as a significant marker in understanding the universe's original radius and the conservation of momentum during these processes. Participants clarify that the Big Bang should not be viewed as an explosion but rather as an expansion of spacetime without a pre-existing volume. Current evidence suggests that while a "Big Crunch" is theoretically possible, the universe is likely to expand indefinitely.

PREREQUISITES
  • Understanding of Planck length (L*) and Planck density
  • Familiarity with concepts of cosmic expansion and collapse
  • Knowledge of general relativity and its implications on the universe's fate
  • Awareness of cosmological constants and their role in cosmic dynamics
NEXT STEPS
  • Research the implications of Planck length and Planck density in cosmology
  • Study the differences between closed, flat, and open curvature of the universe
  • Explore the concept of the cosmological constant and its effects on cosmic expansion
  • Investigate the theories surrounding the "Big Crunch" and current observational evidence
USEFUL FOR

Astronomers, physicists, cosmologists, and anyone interested in the fundamental principles of the universe's expansion and potential collapse.

Loren Booda
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Where there is explosion, there is usually a concomitant implosion. If the Planck length, L*, demarks an original radius for the cosmos, a collapse therefrom, symmetrical to the big bang expansion of spacetime occurs with the conservation of momentum. This "Big Crush" is omnipresent, sub-Planck length and suggests a connectiveness between all matter. Our reality may exist in mirror image, reflected through the primordial surface of separation, L*.
 
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I'm afraid that I don't really understand any of that. (My fault, not yours; it's not something that I've been exposed to before.) The aspect that strikes me as being maybe a little off is that I don't think that the BB can technically be considered an explosion. It's more like a balloon inflating, since it's not exploding into a pre-existing volume. No mass or energy is being ejected from the source; the source itself is just expanding.
 
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Loren Booda said:
Where there is explosion, there is usually a concomitant implosion. If the Planck length, L*, demarks an original radius for the cosmos
The Planck length isn't supposed to be the original radius of the cosmos, if the universe has flat or open curvature (and the simplest topology) then the cosmos was infinite at all times past the Planck time, and even if the universe is finite in size, I think all you can say is that as you approach the Planck time the density of matter/energy approaches the Planck density. See this thread for more on the significance of the Planck density/Planck length, and the last section of my first post on this thread about why you shouldn't picture the Big Bang as an explosion of matter in a preexisting space, and the difference between closed, flat and open curvature.
Loren Booda said:
a collapse therefrom, symmetrical to the big bang expansion of spacetime occurs with the conservation of momentum. This "Big Crush" is omnipresent, sub-Planck length and suggests a connectiveness between all matter.
If the density of matter/energy is high enough the universe could collapse in a "Big Crunch" at the end of time, but current observational evidence suggests it will expand forever. See http://superstringtheory.com/cosmo/cosmo21.html for a little more info on how the density of matter/energy, as well as something called the "cosmological constant", determine the ultimate fate of the universe according to general relativity.
Loren Booda said:
Our reality may exist in mirror image, reflected through the primordial surface of separation, L*.
I don't understand this part at all--what is L*? What is it separating?
 
L.B. - If you're interested, you can submit this idea (with more details) to the Independent Research forum. Thanks.
 

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