*1* AFAWK.
You could have ∞ universes. That's pretty much the discourse in most multiverse theories. But you'd not be surprised to know that basically no one does research in this area.
It's been said but the best guess right now is one or an infinite number.
Why?
Well we know there's one.
That's the limit of our knowledge.
But if there's two, there's no reason there wouldn't be three. Or four. Or fifty. Or an infinite number.
Obviously nobody knows. But consider this. We used to think our village was the universe. Then our valley. Then our country. Then our planet. Then our solar system. Then our galaxy. Then our universe.
See a trend?
This is almost unknowable although one hypothesis is that a nearby universe may leave "imprints" on the Cosmic Microwave Background if it'd brush towards ours. No definite such imprint has been found though. There once was something curious but I think it was ruled out to basically be a statistical artifact.
I think our only hope here is discovering some form of empirical evidence and currently we don't have anything tangible to show there is more than one. String theory makes predictions but it hasn't been proven and is difficult to prove. In fact, it's been kind of beat up by the LHC unable to discover super symmetry in the energy realms we expected.
If the Big Bang and resultant Big Crunch are true, then there could have been billions of each. Just over and over again.
As far as concurrent Universes, we may never know.
How many points are in a line? Hell, how many lines are there in a plane body? You see where this is going right? Thats the total number of 4D \*universes\* inside a 5D \*multiverse\*
According to String Theory, one followed by five hundred zeros, maybe more. That's an enormous number, total number of atoms in the entire observable universe is in the region of one followed by eighty zeros.
>According to String Theory, one followed by five hundred zeros
See,this is the thing with layman level misinterpretations. It's not that string theory predicts 10^1500 universes, it's just that there's about this number of **solutions** to the string theory field equations. Each of which generates their own type of universe. It's not a generic prediction of “How many universes are there”,rather it's a prediction of “just how many universes can exist within the string theoretic framework”.
>>According to String Theory
>rather it's a prediction of “just how many universes can exist within the string theoretic framework”.
Doesn't this mean essentially the same thing?
No. Perhaps I used the wrong words. Lemme look it again.
What I'm saying is that there's 10^1500 ways string theory's extra dimensions could be compacted, leading to different universes,but the ‘universes’ part doesn't mean that there's many universes,just one but with different physics due to different extra dimension compacting arrangements.
Somewhere between 1 and infinity is the current estimate.
One or infinity
*1* AFAWK. You could have ∞ universes. That's pretty much the discourse in most multiverse theories. But you'd not be surprised to know that basically no one does research in this area.
We could have every cosmologist on the planet devoting their life to research in this area, and we still wouldn't get anywhere.
It's been said but the best guess right now is one or an infinite number. Why? Well we know there's one. That's the limit of our knowledge. But if there's two, there's no reason there wouldn't be three. Or four. Or fifty. Or an infinite number.
At least one, we hope.
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Obviously nobody knows. But consider this. We used to think our village was the universe. Then our valley. Then our country. Then our planet. Then our solar system. Then our galaxy. Then our universe. See a trend?
the clue is in the name. “Uni”
As far as any of us are concerned, it's one. Now get off Reddit and enjoy your one and only existence in that universe.
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This is almost unknowable although one hypothesis is that a nearby universe may leave "imprints" on the Cosmic Microwave Background if it'd brush towards ours. No definite such imprint has been found though. There once was something curious but I think it was ruled out to basically be a statistical artifact. I think our only hope here is discovering some form of empirical evidence and currently we don't have anything tangible to show there is more than one. String theory makes predictions but it hasn't been proven and is difficult to prove. In fact, it's been kind of beat up by the LHC unable to discover super symmetry in the energy realms we expected.
If the Big Bang and resultant Big Crunch are true, then there could have been billions of each. Just over and over again. As far as concurrent Universes, we may never know.
Evidence of only one. Anything else is pure conjecture.
How would we know ?
No one knows or currently has any way to demonstrate there is more than one to my knowledge.
Unless I’m a Boltzmann brain, at least one.
yes
What part of UNIverse don’t you understand?
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As of right now, just one. Any other answer is false.
How many points are in a line? Hell, how many lines are there in a plane body? You see where this is going right? Thats the total number of 4D \*universes\* inside a 5D \*multiverse\*
Define "Universe"
According to String Theory, one followed by five hundred zeros, maybe more. That's an enormous number, total number of atoms in the entire observable universe is in the region of one followed by eighty zeros.
>According to String Theory, one followed by five hundred zeros See,this is the thing with layman level misinterpretations. It's not that string theory predicts 10^1500 universes, it's just that there's about this number of **solutions** to the string theory field equations. Each of which generates their own type of universe. It's not a generic prediction of “How many universes are there”,rather it's a prediction of “just how many universes can exist within the string theoretic framework”.
>>According to String Theory >rather it's a prediction of “just how many universes can exist within the string theoretic framework”. Doesn't this mean essentially the same thing?
No. Perhaps I used the wrong words. Lemme look it again. What I'm saying is that there's 10^1500 ways string theory's extra dimensions could be compacted, leading to different universes,but the ‘universes’ part doesn't mean that there's many universes,just one but with different physics due to different extra dimension compacting arrangements.
Why are you getting angry at some random stranger? Are you feeling okay? You seem stressed and depressed.
No lmao. That's just your interpretation of my voice.
I bet you say that a lot.
Tell me that when you win your bet.
I knew it!
Knew what?
Ask yourself.
Answer the question.
As many as the theory allows