Gravity as cause or effect?

  • #1

Main Question or Discussion Point

According to current theory, high concentrations of matter warp space-time and create gravity.
The Einstein field equations EFE describe the fundamental interaction of gravitation as a result of spacetime being curved by matter and energy.
Would not a reinterpretation of the EFE lead to the following alternative explanation of how matter collects to form planets and stars? Rather than matter collecting, distorting space-time and thereby creating gravity effect, could discontinuous areas of SpaceTime result in concentrated areas of gravity which then attract collections of matter?
 

Answers and Replies

  • #2
Nugatory
Mentor
12,618
5,169
Would not a reinterpretation of the EFE lead to the following alternative explanation of how matter collects to form planets and stars? Rather than matter collecting, distorting space-time and thereby creating gravity effect, could discontinuous areas of SpaceTime result in concentrated areas of gravity which then attract collections of matter?
No, because there are no discontinuous areas of spacetime in the theory.
The Oppenheimer-Snyder solution to the Einstein field equations describes how infalling matter behaves in general relativity.
 
  • #3
34,056
9,922
In addition, there would be no reason why those regions of spacetime should exactly follow the matter in literally all experiments (including those where matter is accelerated by other forces, like electromagnetism). Unless the matter (more precisely, the stress energy tensor) itself is the source of gravity.
 
  • #4
No, because there are no discontinuous areas of spacetime in the theory.
The Oppenheimer-Snyder solution to the Einstein field equations describes how infalling matter behaves in general relativity.
It is my understanding that discontinuous areas of spacetime are not excluded in the theory. Discontinuities could not in practicality be excluded by observation.
 
  • #5
PeterDonis
Mentor
Insights Author
2019 Award
28,311
8,070
It is my understanding that discontinuous areas of spacetime are not excluded in the theory.
Where are you getting that understanding from? Spacetime is a continuous 4-dimensional manifold in GR.

Discontinuities could not in practicality be excluded by observation.
Why not?

I think you need to be much more precise in explaining exactly what you mean by "discontinuities in spacetime".
 

Related Threads on Gravity as cause or effect?

Replies
3
Views
804
Replies
9
Views
6K
Replies
41
Views
1K
Replies
12
Views
4K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
13
Views
2K
Replies
5
Views
591
  • Last Post
Replies
19
Views
3K
  • Last Post
2
Replies
32
Views
5K
  • Last Post
2
Replies
25
Views
4K
Top