OK, I admit that the idea is not original. I've seen it before, but I keep losing the link, and it comes up from time to time, so it was about time to create my own version.

My own version of what, you ask? Why, a simulated starfield, and a copy of it, slightly expanded.

You can drag the expanded starfield with the mouse. Note how, regardless which star you use to line up the two copies, that star will appear to be the "center" of the expansion.

This is exactly the way things work in the cosmos. Cosmic expansion has no center; but regardless which star system you live in, it will appear to be at the center.

Try lining up, in particular, the red star and then the blue star with its copy of the same color, and notice how they then appear as the center of the expansion.