Spacetime Expansion in Big Bang 100% Certainty?

  • Thread starter Alfrez
  • Start date
  • #1
Alfrez
127
0
In Big Bang theory, Spacetime itself expands from Planck size to the universe today. This means there is no existing space before the bang.

But what if we assume space and time already existed in the universe and the Big Bang was an explosion of just matter. Is there no cosmology theory or model that can ever support this? If so. Then it means spacetime geometry being elastic is a law of physics set in stone and not irreplaceble with anything else forever and a categorical finality with 100% certainty??
 

Answers and Replies

  • #2
BillSaltLake
Gold Member
184
0
100% certainty is a tall order, especially when talking about something that's so remote from current lab-testable physics.
 
Last edited:
  • #3
Alfrez
127
0
General Relativity is in severe conflict with Quantum Mechanics. Does it mean that it is still possible General Relativity is wrong?
 
  • #4
BillSaltLake
Gold Member
184
0
GR is an approximation, and it's also not a complete theory of everything. It doesn't make predictions about QM, so that the behavior of gravity in the QM realm is not (yet) known. In the sense that GR is an approximation, it is by definition not completely "right".
 

Suggested for: Spacetime Expansion in Big Bang 100% Certainty?

  • Last Post
Replies
25
Views
1K
Replies
6
Views
2K
Replies
31
Views
790
  • Last Post
2
Replies
58
Views
3K
Replies
4
Views
501
Replies
69
Views
2K
Replies
11
Views
616
  • Last Post
Replies
1
Views
715
  • Last Post
Replies
10
Views
1K
Top