B Accelerated expansion of the universe

[dayalanand roy]

If a big bang could occur at a point in space-time, couldn't we at least speculate that many big bangs could have occurred at many other points in space time, and could have resulted in many parrelel universes evolving far away or in close neighborhood of our own one?
And then, could it not be possible that the observed accelerated expansion of our universe could be due to the gravitational effects of our neighborhood universes?

 

[Arman777]

If a big bang could occur at a point in space-time, couldn't we at least speculate that many big bangs could have occurred at many other points in space time,

You cant, because in big bang model the universe didn't started from a point in space-time. Space time created by big bang itself.

 

[PeroK]

You can speculate. But physics is more than mere speculation.

If something has a gravitational effect on a galaxy in our universe then, by definition, that something is part of our universe.

 

[lekh2003]

And then, could it not be possible that the observed accelerated expansion of our universe could be due to the gravitational effects of our neighborhood universes?

Lots of things could be possible. It could be possible that the universe is just a simulation, but I can't say that without having reason and/or any academic experience backing that.

You have to think about the consequences of a theory, the reason for accepting the theory, and how to confirm the theory, before we can accept theories. Otherwise it is simply speculation and cannot be given an educated answer.

In that case I think we should have been observed faster acceleration in one particular direction due to the presence of the another universe.

Like here. I can speculate that there would actually be an infinite number of universes pulling in every direction. But of course, this would be futile, since it is merely speculation. Science fiction.

 

[Drakkith]

If a big bang could occur at a point in space-time,

If we roll the clock back in our LCDM model (our current standard cosmological model), we will observe that the density of the universe increases everywhere, eventually reaching infinity everywhere at the same time, before we ever get to a single point in spacetime. In other words, the big bang happened everywhere all at once, not at a single location.

 

[dayalanand roy]

You cant, because in big bang model the universe didn't started from a point in space-time. Space time created by big bang itself.

Thanks

 

[dayalanand roy]

You can speculate. But physics is more than mere speculation.

If something has a gravitational effect on a galaxy in our universe then, by definition, that something is part of our universe.

Thanks

 

[dayalanand roy]

Lots of things could be possible. It could be possible that the universe is just a simulation, but I can't say that without having reason and/or any academic experience backing that.

You have to think about the consequences of a theory, the reason for accepting the theory, and how to confirm the theory, before we can accept theories. Otherwise it is simply speculation and cannot be given an educated answer.

Like here. I can speculate that there would actually be an infinite number of universes pulling in every direction. But of course, this would be futile, since it is merely speculation. Science fiction.

Thanks. It was a simple speculation only as i mentioned in the post. I cannot propose a theory as I am not a physics student. And to learn about the consequences of this speculation, I just posted it here.

 

[dayalanand roy]

If we roll the clock back in our LCDM model (our current standard cosmological model), we will observe that the density of the universe increases everywhere, eventually reaching infinity everywhere at the same time, before we ever get to a single point in spacetime. In other words, the big bang happened everywhere all at once, not at a single location.

Thanks. But this is a very tough answer and I shall take much time to understand it.

 

[PeterDonis]

Thread closed for moderation.

Edit: Some off topic posts have been deleted. The OP question has been addressed and the thread will remain closed.