Spacetime is Infinite

Is there really anyone who will deny this, with the current observations of the universe?

Anyone who knows about the universe, will know that before the acceleration of the universe, we thought the universe could be closed. Now the general consensus of the universe, is that it will expand infinitely. Not into infinity, because if that was true, then nothing about infinity holds true about the moment in the current cosmos expansion.

Is this denied, and who denies it?

My point is, is that the universe has an infinite spacetime, which means there is no absolute count on how much spacetime there is, at any given time, even in a single chronon.

 

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It seems to me that you are making the classic mistake of confusing the bing bang with a standard explosion...

 

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Not at all. The big bang is not an explosion, and big bang is also still happening.

In fact, big bang may happen forever, unless something stops it. This means, that expansion as we know it, is big bang, and is infinite, if it is Open.

 

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Kaneda denies it. He thinks the universe is a hypersphere. He doesn't think that any other closed shape in 4 dimensions (with a 3 dimensional surface) can possibly exist and match observations. Not that observations point to a sphere topology either. But then he denies dark energy, which makes the universe expand faster over time, giving it some properties quite the opposite of a sphere.

 

I don't always agree with Kaneda.

 

Is there a fixed amount of matter in the universe?

 

I deny it - and strongly!

You continue to mangle the observed facts. The universe is NOT infinite - it is expanding TOWARDS infinity. Can you not understand the simple difference??????????

 

Oh really. What evidence do you have, other than the observational evidence that seems to point to an infinitely expanding universe?

Do you know what an infinite expansion means? There is no ''towards'' about it, if big bang continues into infinity. Big bang is still happening, and will continue to do so.

 

What do you mean, by a fixed amount of matter?

 

Well, what are you saying then exactly? Recent WMAP data has again confirmed expansion due to dark energy and the acceleration is generally accepted. So the universe will expand forever. How do you derive infinte space-time from that?

 

That is not the point - Dark matter is considered a cause for expansion. In fact, it may be the main reason why astrophysicists across the world see the universe expanding faster than light.

The universe was infinite when it wasn't expanding faster than light, and still is. Why don't you understand this?

 

Dark energy.

The volume of space-time is expanding, but is the amount of material also increasing or not? How else can you interpret the question?

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I would assume, that dark energy ( sorry for getting muddled...), is in fact being created in the same way, when enough energy is added into the vacuum. But eventually, this energy will not create matter at all, because of an energy restraint. So energy will remain in this universe, whilst matter will not.

 

Like I said, I think you are making the classic mistake regarding the big bang. The apparent expansion at C at about 13.7 BLY is the result of an additive effect. If periods of slower expansion occurred, it would only move the distance at which the apparent expansion tends towards C farther away. If the expansion was slow enough we could have seen double images as the light of some distant stars would have had enough time to circumnavigate the universe. If I left now and could hypothetically and unrelativistically travel at speeds exceeding C, I would end up right back where I started, and this is true for today as well as any time in the past and at any starting point in the universe. All that has changed in this regard is the time it would take me to do this.

 

Kalster, itis important that you understand the meaning of infinity, before making claims it doesn't exist next to the rapid expansion.

I hypothesize, that maybe the boundary has fluctuations of rapid expansion, as predicted by inflationary physics.

 

These are not claims, they are the current consensus AFAIK.

Which physics is this then? And how would that imply infinte space-time? I understand infinity, but you still have not provided any basis for your claims.

 

Of course I know what it means. It's YOU, Reiku, that has all the difficulty understanding the usage of the English language and scientific terms!:bugeye:

You even fail to understand such simple things as "into" and "toward" have indentical meanings in this context! How dense can you be??????????? Sheesh!!!

I cannot fathom why you keep exposing your ignorance so often, unless it's just as I have said several times before - your cronic need for attention, good OR bad.:shrug:

 

Infinite doesn't exist in nature. Doesn't it tell you something that the universe is still expanding ?

 

State your case properly Reiku, because up until now you have not been clear in the least.

 

How can you count spacetime? You can measure the amount of space at a given time, but you can't measure how much spacetime there is. The amount of space in the universe at any given time must be finite, if it isn't then there must be infinite matter and infinite energy because, as you yourself said in another thread, without matter or energy space cannot exist.

Unless you have something else in mind?