time and space

[jamey2k9]

before the big bang what was there if the big bang started time and space then what was before that because there had to be something to contain the big bang in the first place but what was it

[Klaynos]

We don't know. There are some ideas that are around atm, but we don't know.

[jamey2k9]

i was asking for theorys and ideas

[granpa]

http://www.google.com/search?hl=en&safe=off&client=firefox-a&rls=com.ubuntu%3Aen-US%3Aunofficial&hs=DI8&q=%22before+the+big+bang%22+time+start+beginning+forum&btnG=Search

[cameron marical]

i know right, what made the energy that made us?

[Martin]

before the big bang what was there if the big bang started time and space then what was before that because there had to be something to contain the big bang in the first place but what was it

 

Big bang theory does not say that the big bang started time and space. Scientifically there is no reason to assume that it did.

 

Models currently studied go back before and there is plenty of time and space and energy as usual, just in a contracting mode.

[devrimci_kürt]

thanks Martin

An Interesting Approach

[Martin]

thanks Martin

An Interesting Approach

 

no problem, kürt.

Just pointing out the obvious---the older bigbang model doesn't go back to any instant of time you can call the beginning.

 

It only starts to apply when the universe is already expanding, before that at time t=0 so to speak it experiences failure and doesn't compute. So the older model simply does not describe a beginning.

 

I think you are familiar with this---we've discussed it several times here at SFN.

 

The newer models do not experience failure---do not have a singularity where things blow up---and continue on back to times before t=0.

 

So basically you can take your choice: NEITHER ONE says that space and time had a beginning at t=0.

 

One way to track the changes in how the experts are thinking is to look at the list of topics at the big international GR and cosmology

conferences. This year will be the MG12 meeting in Paris

http://www.icra.it/MG/mg12/en/parallel_session.htm

 

You can see that nonsingular cosmology and quantum cosmology are featured in the parallel sessions.

Section D: COT-3 and COT-4

 

Even more relevant will be the program at GR19, in 2010.

http://www.gr19.com/index.php

These meetings happen once every 3 years. GR19 hasn't posted much yet.

Edited February 2, 2009 by Martin

[devrimci_kürt]

well

The Universe = Space and Time ???

right or wrong?

[Martin]

well

The Universe = Space and Time ???

right or wrong?

 

I would say right.

Include matter as well, why not?

[devrimci_kürt]

thanks...big bang (of course physics) ....every time is a good topic/subject

[Airbrush]

well

The Universe = Space and Time ???

right or wrong?

 

Our visible universe is not necessarily ALL space and time. There could be others very far away, or hidden in higher dimensions. Anywhere there is matter, then there is space-time. Even the great empty voids between superclusters have some atoms, about one hydrogen atom per cubic meter.

 

Our universe (our space-time) may be only a local phenomena. There may be other space-time universes quadrillions of light years away. Where there is no matter there is only space, not space-time. Space-time requires matter. I just made this up, but it seems logical to me.