Is the universe truly expanding?

[rootone]

One thing that is very important to remember is the difference between the observable universe and the whole universe.
We can make convincing arguments about what is observable, but beyond what is observable always will be speculative - even if we do have some neat ideas.

 

[Drakkith]

Is it okay to say:
If space is expanding, then there is no multiverese... only one univ erse exists. BEcause all universes would expand, bond and ultimately be one thing.

No, because you're thinking of a multiverse as multiple universes in the same spacetime, such that as they expand they end up colliding with each other. This is not the case.

 

[tressure]

No, because you're thinking of a multiverse as multiple universes in the same spacetime, such that as they expand they end up colliding with each other. This is not the case.

okay, what is the case then?

 

[guywithdoubts]

okay, what is the case then?

Your example is about regions of space that belong to the same universe. What a "multiverse" is depends on which model you use, but they are all speculation.

 

[tressure]

let me ask this then, was space there in the beginning of time or was it also born during the big bang?

 

[MK5]

i think that that matters come from explosion of stars etc...thats why it get expands

 

[tressure]

you are correct mk5, explosion of starts give birth to asteroids, planets... and we all know that during that explosion gases are released, but eventually form chunks of matter, ultimately asteroids, and planets. but that does not explain the expansion of space, because expansion of space is entirely independent of exploding starts.
73% of everything that's there is space, planets and stars only make up about 3%, logically there is no way 3% can infulence 73%

 

[MK5]

if we imagine there are some layers outside our universe in which some amount of matter can travel from our universe BUT not all matter, as that matter remains in, that's why our universe gets expand

 

[tressure]

MK 5 can you be literal in you explanation, finding it difficult to understand you here!

 

[MK5]

This won't be the reason of universe expanding but if we imagine that that like layers of Earth there are different layers in our universe as the explosions in our universe the matter gets spread through and that matters remains there and gets expanded...".Also universe is getting cooled and amount of matter getting increased as amount of matter getting increased the matter is added into our universe and it gets expanded"

 

[MK5]

as another reason can be is that our universe is little round in shape it is getting flat and that's why we imagine that it its getting expanded

 

[tressure]

oh! thanks... you need to understand that there is no center of the universe, that means there isn't layers of the universe otherwise there would be center layer, which is clearly not the case. second thing is you need to also understand that matter (galaxies) are not getting bigger and are also not moving, only space between the is getting bigger.

 

[berkeman]

Thread is closed for Moderation...

 

[Drakkith]

This thread will remain locked. I remind all members that PF exists not to give personal opinions, but to learn mainstream science.