If the universe is expanding and the universe is never ending, then what is it expanding into?

We do not *know* that the universe is never ending. "Finite but unbounded" seems just as likely. Of course, the universe is so vast, for all intensive purposes, it can usually be described as infinite.

It's essentially expanding into itself... or perhaps a better explanation would be, it is expanding into another physical dimension. We can only perceive three dimensions of space, but that does not rule out that there are more.

The common analogy is that our place in the universe, and all that we can observe of the universe, is the equivalent of the surface of a balloon that is being inflated. The surface has a finite number of 2 dimensional coordinates (finite) but has no "center" or "edge" (unbounded). The balloon is expanding into three dimensional space, but how would you explain that to a two dimensional being, that is confined to the two dimensional surface of that balloon?

Now, with our universe, take that balloon, and make it 3 dimensional space, perhaps expanding into a fourth physical dimension.

Cosmology is difficult to wrap your head around sometimes. Don't get too discouraged.

The answer to this dilemma is to be found in the mathematical discipline of topology. The fact is that, though space is itself expanding, it is somewhat abstract, and it is the shape of space, rather than the extent of it that matters.

Space is curved, and the curvature of space is of such a shape that it can be both finite and infinite at the same time. The curvature of space enables the universe to be both inside itself and outside itself, all at the same time.

So space is both expanding and not expanding, both infinite and finite, and both inside itself and outside itself. The science of topology is aware of a number of shapes that can fit these characteristics, and there are presumably many more that are yet to be discovered.

For a glimpse of what I am talking about, look at this page:

http://www.kleinbottle.com/baby_klein.htm

The object pictured is called a Klein Bottle, and it represents a 3-dimensional model of a multidimensional object that can be both finite and infinite, both inside itself and outside itself, all at once. Of course to be actual, rather than a model, it must exist in multi-dimensional space. But reality does exist in multi-dimensional space, of which we can be only partly aware.

Limitations such as these create apparent contradictions, such as the "what is the universe expanding into?" dilemma, where in actual multi-dimensional space, no contradiction exists.

I realize this is difficult to contemplate right off the bat. It takes most people many years--perhaps a whole lifetime--to begin to understand. But think about it. It is the real answer.

Also, run an internet search on "klein bottle."

Good luck1

It's not expanding "into" anything. Space itself expands, increasing the distances between all the galaxies. There's no such place as outside the universe for it to expand into. The universe is all the space there is, and there is more of it every day.

Actually, scientists do not know.

They think that the universe is expanding into "nothing", just nothing. It is hard to think about, but there is no observations or evidence of the ends of the universe, and what it is expanding into.

This is what we do know:

The universe is expanding right now, and new galaxies and stars are forming, while old galaxies and stars are coming to an end.

Dear,

The Universe is expanding to The End of Time.

As we know by the Theory of Big Bang, when it happened, the time starts since, so when there is end of time, the expansion of the universe also stop.

This also explain with the death of a Human Being, when his time ends, he must be dead.

It's void. It has dark energy

But frankly we can't be certain that it's empty because only a small portion of the universe is observable with current technologies.

Stop confusing your self.The universe is just space. The part that is expanding is the solar systems and Galaxy's.

nothing.

Seriously.Think deep into it and you'll find yourself