Why Do We Believe the Big Bang Contained All Matter and Energy in the Universe?

Click For Summary

Discussion Overview

The discussion revolves around the concept of the Big Bang and whether it contained all the matter and energy in the universe. Participants explore the implications of this idea, questioning the necessity of a singular origin point and considering the possibility of multiple Big Bangs occurring in different localized areas of the universe. The scope includes theoretical considerations and speculative reasoning.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants question why the Big Bang should be viewed as containing all matter and energy, suggesting that it may not have waited for all mass to accumulate before the explosion.
  • Others point out that reversing the expansion of the universe shows all matter coming from a localized point, with no significant discrepancies noted up to one billionth of a second before the Big Bang.
  • There are suggestions that multiple Big Bangs could exist in different regions of the universe, with the limitation that current observational capabilities may not allow us to gather sufficient information about these potential events.
  • One participant emphasizes that theories must be based on observations and that any competing theory should explain existing observations at least as well as the current theory.

Areas of Agreement / Disagreement

Participants express differing views on the singularity of the Big Bang and the possibility of multiple Big Bangs, indicating that the discussion remains unresolved with competing ideas presented.

Contextual Notes

Limitations include the dependence on current observational capabilities and the challenge of formulating theories that account for phenomena beyond our observational reach.

Mazerakham
Messages
24
Reaction score
0
Why do we think that the Big Bang contained "all" the matter/energy in the universe? If we imagine the point, the "big bang point" to be some accumulation of mass, what makes us think that it should have "waited" for all the mass in the universe to accumulate in it before exploding?

That's just a thought that occurred to me.
 
Space news on Phys.org
Mazerakham said:
Why do we think that the Big Bang contained "all" the matter/energy in the universe? If we imagine the point, the "big bang point" to be some accumulation of mass, what makes us think that it should have "waited" for all the mass in the universe to accumulate in it before exploding?

That's just a thought that occurred to me.

When we reverse the film that is the expansion of the universe, we are able to see that all the matter in the universe came from one very localized place in space and time. We have been able to reverse this film back to one billionth of a second before the BB, and there are no discrepancies worth noting.
 
Why couldn't there be other such localized areas, billions upon billions of light years away from another bigbang. There could have been billions of bigbangs all over the universe. We just can't see far enough to gather the appropriate information, and we need to do more than just see as well. We have to go there, where ever there is. :P
 
bucky1andonly said:
Why couldn't there be other such localized areas, billions upon billions of light years away from another bigbang. There could have been billions of bigbangs all over the universe. We just can't see far enough to gather the appropriate information, and we need to do more than just see as well. We have to go there, where ever there is. :P

1] We base our theories on what we observe. No observation, no theory.

2] A competing theory to what we have needs to explain everything our current theory does at least as well if not better. What does you supposition about matter elsewhere do?

bucky1andonly said:
We just can't see far enough to gather the appropriate information, and we need to do more than just see as well. We have to go there, where ever there is. :P
Why?
 

Similar threads

High School Could Black Hole Collisions Trigger a Cyclical Big Bang and Universe Rebirth?
  • · Replies 19 ·
Replies
19
Views
3K
Undergrad Questions about the Location of the Big Bang and the Age of the Universe
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Question about the big bang singularity
  • · Replies 13 ·
Replies
13
Views
5K
High School Does an infinite universe contradict a Big Bang origin?
  • · Replies 65 ·
3
Replies
65
Views
9K
Undergrad Shouldn't the Big bang be physically impossible?
  • · Replies 25 ·
Replies
25
Views
4K
Graduate Form of energy at time of big bang
  • · Replies 11 ·
Replies
11
Views
4K
High School Big Bang Question -- How was the first matter formed?
  • · Replies 69 ·
3
Replies
69
Views
7K
High School Age of Universe: Big Bang, Braneworlds & Perspective
  • · Replies 22 ·
Replies
22
Views
4K
Undergrad Do all geodesics begin and end at the big bang?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Does the Cosmological Principle in any way underpin Big Bang Theory?
  • · Replies 33 ·
2
Replies
33
Views
4K