NOTE: Taken from another thread on a similar subject: https://www.physicsforums.com/showthread.php?t=125698(adsbygoogle = window.adsbygoogle || []).push({});

"An infinite amount of space with matter uniformly distributed throughout", is not a claim of infinite matter – at least it shouldn't be. loseyourname said:Well, the main questions were two:

1) Is there an infinite amount of matter in the universe?

2) Did Tegmark actually make that claim?

If matter is assumed to be inside of a greater space that is infinite – then matter is necessarily less than infinite.

I would hope his point, is simply about the uniformity of distribution at the infinitesimal. This is quite possible.

Otherwise, it's just a short-sighted rehash of a relative ad infinitum.

One way of looking at an open and closed model is this:

A closed model has an edge – because matter is outside of space.

An open model has no edge – because space is outside of matter.

Another way of looking at them is this:

A closed model – has both matter and space as finite.

An open model – ha both matter and space as infinite.

A closed model – has a big bang and crunch.

An open model – has no big bang and crunch.

Finite – has a beginning and end.

Infinite – has no beginning or end.

Finite – means the universe began, is, and will stop "actually" happening.

Infinte – means the universe is always in the state of potential of "will happen".

Either way, however – we can't tell unless we know what is outside the universe. Any description of the universe as "all" – begs the same question. What is outside of it? Space and matter are only capable of being a relative ad infinitum. Without an absolute there is no answer.

Is the Absolute inside or outside the universe? It can't be both.

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# The cosmological principle in simple models of the universe

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