I don't really get Big Bang

BUDFORCE said:
Its easy.

When all of the energy is released from the stars and they collapse under their own gravity, then eventually the gravity of those will pull others into it, form black holes etc, galaxies spiral into those, the galaxies spiral into each other, until all matter in the iniverse converges into one spot, then the thing blows up again and the cycle repeats.

I watch Scott Manley, I got this. hahahahahhahahahaha
Click to expand...
Ah, the Big Crunch.

I believe this theory has been disproven.
https://en.wikipedia.org/wiki/Big_Crunch
 
Raymond Lin said:
How did the energy get there?
Click to expand...

You are thinking very much like a human, as in - all things have a start and end point because all things you know and have been told about have a start and end point. But we can theorise that there are things outside our concept of time that just have always existed.
 
Greebo said:
There wasnt nothing before the big bang. All the energy of the universe was contained in the Initial singularity. Or that is the current thinking anyway
Click to expand...
Unless we're in a simulation in which case, everything can come from nothing. ;)
 
Raymond Lin said:
How did the energy get there?
Click to expand...

It was just there, you're asking a question that is impossible by current science to answer, this borders on philosophy and really deep quantum mechanics where things really do seem like magic

My question to you is, why does it need to "get there" ? Why is it not possible to consider it was just there, outside of time & space ?
 
Lysander said:
You are thinking very much like a human, as in - all things have a start and end point because all things you know and have been told about have a start and end point. But we can theorise that there are things outside our concept of time that just have always existed.
Click to expand...

It could be that a space monster hopped over to this dimension and farted, which is the big bang, and then left.
 
Minusorange said:
It was just there, you're asking a question that is impossible by current science to answer, this borders on philosophy and really deep quantum mechanics where things really do seem like magic

My question to you is, why does it need to "get there" ? Why is it not possible to consider it was just there, outside of time & space ?
Click to expand...

If you accept that then you are breaking the 1st law? Can you have both?
 
Bug One said:
That's all a theory is.
Click to expand...

A theory in a scientific sense is an idea that is supported by either physical or mathematical evidence. It's not just a "Hey, maybe it's like this".

The problem when discussing the big bang is that you need to think of our universe in 4 dimensions. Space and time together or SpaceTime. All 4 or our observable dimensions blinked in to existence at the same time and so discussing what was before the big bang is kind of moot, seeing as there was no before as our particular version of time was created at that very moment. Current thinking is that there are multiple universes and each is a vibration in string substrate of the multiverse. Physical universes are created when the strings move just so. This is of course explaining it at a very basic level and is probably slightly or very wrong due to it being quite a long time since I did my Physics degree.

However, currently a lot of the working theories about the origins and nature of the universe can only be proven mathematically due to the energy levels required to prove them experimentally being far outside of our current capabilities. We're kind of in a place where a model is proven due to its inherent elegance (truth = beauty, beauty = truth).
Back when I was studying this I didn't like a lot of the string theory ideas because they predicted the existence of a massive amount of additional particles that we have never observed. I don't like models that predict things that either haven't or never will be discovered.

This is a good read if you want a basic overview of grand unification theory which is one of the pre-requisites of string theory: https://en.wikipedia.org/wiki/Grand_Unified_Theory
And this is a good overview of string theory at a basic level: https://en.wikipedia.org/wiki/String_theory
And another good read about unified field theory which is the current area of investigation for a lot of high-energy physicists: https://en.wikipedia.org/wiki/Unified_field_theory

This is a good book. A little out of date but it gives a good overview of what was happening in the first 3 minutes: https://www.amazon.co.uk/First-Thre...the+first+three+minutes&qid=1622214351&sr=8-1
 
Minusorange said:
Why is it breaking the 1st law ? The energy was always there, no energy has been created or destroyed, the same energy has merely changed state from just being "there" to expanding
Click to expand...

That.

1st law states that Energy can't be "just there"...it came from somewhere.
 
Problem is most of you are looking at this in just 4 dimensions, The universe ahs at least 10 dimensions that we know of.
 
You must log in or register to reply here.
Back
Top Bottom