# Can you exist in another parallel universe

Parallel universe?

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TiloS:
I am of the opinion that there can be no parallel universes.

Imagine two universes. What is the spatial distance between them? None, in between there is nothing, not even space. No space means: The distance = 0, so they at least border one another. In the end, they would be reunited, forming only one universe.

greeting
Tilo

Schillrich:
Hello Tilo,

you can't look at it that way. You are not allowed to imagine universes as "balloons", spheres or other 3D objects (we just had the topic in another thread;)) that are adjacent or separated. The idea of ​​(spatial) contact or (spatial) distance between objects only works if you are already in the room. But space only exists in the universes, not between them. This means that this "geometric" analogy cannot be applied.

TiloS:
Hi Daniel,

I already know about the balloons. Precisely because a universe is presumably not located in a spatial structure, I come to the conclusion.
I do not see the outside as an abstract structure, I have only made it clear with the geometric analogy that there can be no outside of the universe. Because there would be nothing in between. And no space means no distance. Therefore, in my opinion, everything that exists can only exist within one universe.

greeting
Tilo

1234567891011a:
I came up with a fitting analogy: a stack of sheets of paper. Each leaf has (idealized of course) 2 dimensions. The expansion in width represents the three dimensions of space, the length the dimension of time. The different universes are "stacked" high. Since these are neither in width nor in length next to each other, a being who only thinks in 2 dimensions would come to the conclusion that there is no difference at all between the leaves and that there is therefore only one. However, we see the stack and recognize a distance: the horizontal, an additional dimension. In order to bring in the expansion of the space, one only has to imagine that the individual leaves are trapezoidal, with the less broad end at the point of length that represents the past and the broad end in the future. (In order to represent the whole time, the less wide end has an extension of 0, i.e. a triangle instead of a trapezoid).

Addendum: Due to the reduction in dimensions, it is unfortunately not possible to include the fact that there is no universal reference system (i.e. also no center point)

TiloS:
Hello "1234567891011a",

You are implying a higher dimension in which the universe is embedded. We didn't want to do that at the moment.

I have nothing against the fact that there are other dimensions, but they are all in the universe.

greeting
Tilo