Undergrad Huge Hole Found in the Universe

[Ibix]

What if you are looking through a wormhole that connects much further?

Then you are talking about a different spacetime, one that includes such wormholes. The behaviour of it might (not necessarily will, but might) be very different from the spacetime being modeled here. If we were to find evidence of such wormholes we would have to reevaluate the plausibility of this model.

 

[etotheipi]

When I saw the title, I thought of this:

 

[TeethWhitener]

What if you are looking through a wormhole that connects much further?

A finite speed of light over a finite length of time gives a finite distance. So the observable universe would still be finite, even if the total universe is not homeomorphic to Minkowski spacetime.

 

[bob012345]

A finite speed of light over a finite length of time gives a finite distance. So the observable universe would still be finite, even if the total universe is not homeomorphic to Minkowski spacetime.

Are you saying a wormhole could not connect to a point beyond the edge of the observable universe from our vantage point?

 

[TeethWhitener]

Are you saying a wormhole could not connect to a point beyond the edge of the observable universe from our vantage point?

Well if we could observe it, it wouldn’t be beyond the edge of the observable universe, now would it?

But it would still be a finite distance. Reread post 29.

 

[DaveC426913]

When I saw the title, I thought of this:
View attachment 271324

Huh. When I saw the title, I thought it was about the American leadership.

 

[PeterDonis]

I really don't know how you can say the source is 'unreliable'?

Because it isn't a textbook or peer-reviewed paper, and it has no math. The credentials of the author don't help any given that, as far as using the reference as a basis for discussion for a PF thread is concerned.

I'm fine to move my questions to the relativity forum.

Meaning that you start a new thread when you can find a better reference.

 

[PeterDonis]

Moderator's note: Some off topic posts regarding wormholes and black holes have been deleted.

 

[shjacks45]

Summary:: This is from an article in space.com by by Robert Roy Britt August 23, 2007.
The hole is nearly a billion light-years across. This one is mostly devoid of stars, gas and other normal matter, and it's also strangely empty of the mysterious "dark matter" that permeates the cosmos.
Other space voids have been found before, but nothing on this scale.

https://www.space.com/4271-huge-hole-universe.html

I would much appreciate any links cited to more information about this hole, especially more recent information. I would also appreciate any information to clarify the following questions.

How much baryonic matter is actually present (taking into account “mostly devoid”)?

Is is mostly hydrogen gas, i.e., either atomic H or H2?

How is this measured?

How it is possible to ascertain the amount (or absence) of dark matter present (taking into account that the presence of dark matter is usually calculated by the pattern of orbits of baryonic matter in a galaxy)?

How big are other space voids (presumably having no stars)?

How far away from Earth are these other voids?

ADDED:
The link at the top. I apologize for forgetting to put it in. I blame it on a senior moment. Thank you @phinds for reminding me.

My religious friends keep telling me the universe is holey.