- a casual banana
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- Fabled Legendary Member
You obviously don't grasp the idea of a dimension.
In our universe, there are 3 spacial dimensions and one time dimension. There can't be a fifth or sixth dimension in our space, because we are three-dimensional. There is a reason why we can't picture a four dimensional object.
Think of it as a graph.
X axis and Y axis. This is two dimensional.
Assuming you've taken geometry, you know what 3 dimensions looks like: Z axis, Y axis, X axis, with the X coming toward you.
Now, all of those are perpendicular in a three dimensional world. Now, find me a way that we can have four, equally perpendicular lines that intersect at one point and one point only.
The essence of the dimension is why there is no "outside" of the universe, or at least one that we can sense or depict. The "observable" universe is smaller than the actual universe.
The universe is so vast, that light hasn't had time to reach the no-edge. And, the universe expands constantly. Some hypothesize that it expands faster than the speed of light, therefore, making it impossible for us to reach the no-edge and making it impossible to see what is "outside" the no-edge.