Question: What is the Universe Expanding Into?

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In summary, according to currently accepted cosmology, the universe is expanding and there is nothing at all, which place is expanding. If the universe is expanding, throw what is it expanding ? There is no "place" because the place itself is expanding, and there is nothing at all, so how can galaxies become far and far from each other ? If the place is the gravitational field which spread in the speed of light, so what is the "nothing" or "no field" or "no place" which place is expanding in? It is not expanding into anything (nor is it expanding into "nothing").
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As has already been pointed out previously in this thread by contributors...the physics describing our Universe does NOT allow, nor require another "hyper" dimension in which it expands. The curvature of our Universe is an intrinsic property, and does not require higher dimensions (again, as has already been noted).

The simplest and most succinct explanation, IMHO, comes courtesy of Proffessor Edward Harrison. "The Universe contains both Space and Time, and does NOT exist in Space and Time". In other words, our Universe contains everything that is physical, and nothing that is non-physical. Space and Time are physical constructs that exist within our Universe.

Also, in accordance to the Location Principle, as well as the Containment Principle and the Cosmological Principle, there is no boundry or "edge" to our Universe. The expansion of our Universe (change in Scale factor) is an intrinsic property, and is "self-contained" and self-consistent. Since our Universe contains all of "Space", there is no "external" space within which the Universe expands into. Instead, our Universe consists of expanding space.
 
<h2> What is the universe expanding into?</h2><p>The universe is not expanding into anything. It is expanding within itself.</p><h2> How can the universe expand into nothing?</h2><p>The concept of "nothing" is difficult to comprehend in the context of the universe. The universe is not expanding into a void or empty space, but rather the fabric of space itself is expanding.</p><h2> Can we ever know what the universe is expanding into?</h2><p>It is currently not possible to know what the universe is expanding into. Our understanding of the universe is limited by our current technology and knowledge.</p><h2> Is the universe expanding into multiple dimensions?</h2><p>There is currently no evidence to suggest that the universe is expanding into multiple dimensions. The expansion of the universe is explained by the theory of general relativity, which does not require multiple dimensions.</p><h2> Will the universe eventually stop expanding into something?</h2><p>It is currently unknown whether the universe will eventually stop expanding. Some theories suggest that the expansion may continue indefinitely, while others propose that it may eventually slow down and reach a maximum size before collapsing in a "Big Crunch".</p>

FAQ: Question: What is the Universe Expanding Into?

What is the universe expanding into?

The universe is not expanding into anything. It is expanding within itself.

How can the universe expand into nothing?

The concept of "nothing" is difficult to comprehend in the context of the universe. The universe is not expanding into a void or empty space, but rather the fabric of space itself is expanding.

Can we ever know what the universe is expanding into?

It is currently not possible to know what the universe is expanding into. Our understanding of the universe is limited by our current technology and knowledge.

Is the universe expanding into multiple dimensions?

There is currently no evidence to suggest that the universe is expanding into multiple dimensions. The expansion of the universe is explained by the theory of general relativity, which does not require multiple dimensions.

Will the universe eventually stop expanding into something?

It is currently unknown whether the universe will eventually stop expanding. Some theories suggest that the expansion may continue indefinitely, while others propose that it may eventually slow down and reach a maximum size before collapsing in a "Big Crunch".

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