[Carlucci]

I have no doubt the universe is expanding, but the question remains:
EXPANDING INTO WHAT????

For something to expand, there has to be a container for it to expand into.

And if there is something for it to expand into, isn’t THAT THING then also part of the universe?

[dangus]

>> And if there is something for it to expand into, isn’t THAT THING then also part of the universe? <<

Nope. You’re arguing that there is time-space outside the universe through which the universe’s edges are traveling. There just isn’t. Your understandings are based on your perceptions, which are systematically expressed in Euclid’s geometry: such notions that parallel lines never intersect, etc. You hear that the universe is spherical, and you suppose that you can draw a line through it, extending out from it in two places, and that there is an “edge” of the universe between these two places that forms the shape of an arc.

But time-space on the humongous scale doesn’t obey Euclidean geometry: a straight line extended forever never “escapes” the universe, and there is no “edge” to the universe; there is only a place at which you are at the center of a grapefruit-sized universe once again.

[moovova]

That’s the thing isn’t it? Even if there was an end to outer space...what’s after that? You can’t just say that outer space ends RIGHT HERE at this LINE, because then someone could step over that line. Even if it’s nothing...nothing is still something. Just frustrating to think about.