Universe is finite or infinite?

[Theorist]

Re: Universe is finite or infinite?

@ajazali

If you people have read yourself what you are suggesting me then you should answer my questions. If you have not then how can you be that sure on what you say? Its either you don’t understand what you have read or it looks like an attempt to knock out the questioners.
Its pretty simple. Value of density of Universe is equal to value of critical density means universe is flat. Where as Theorist gave a video with theory of shape of earth. If its flat how come you say it doughnut shaped?

Maybe it annoys you more, I am almost sure that you people dont know that its determined or not that un-observable universe exists. But you can claim what is beyond the universe. strange. Now again if you have read what you suggest me then answer how come you know what is beyond the universe where you still have to know about un-observable universe?

Nobody is claiming anything, scientist. These are theories human brain can entertain and predict using geometry.

FYI, I did not post a link showing the shape of the earth. Did you even click on it?

The observable universe is flat and seems infinite. We can’t really say that about the unobservable universe. There could be parts of the universe where the density of matter is high causing it to curve. We cannot detect that curvature because we can’t reach around the universe. A 3-torus universe is finite without a boundary. I was only trying to answer your question as to why and how this is even possible.

Who told you if our universe is flat it must be infinite? Universe can be flat and closed. It just doesn’t seem that way because we are trapped in a very small part of the expanding universe. Read up on Closed Manifold. It may clear your confusion about the difference between local and global geometry of the universe.

I am not claiming that the universe is finite with a boundary. I am just telling you of other theories that exist explaining different possible shapes of the universe.

I found a really good link actually: https://my.vanderbilt.edu/stacyfonstad/files/2011/10/ShapeOfSpace.pdf