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[QUOTE="Get a Job, post: 4013701, member: 9775"]
I heard a helpful analogy from Neil deGrasse Tyson to aid one in understanding an expanding universe with no "end," although he used it to explain a different concept.

Imagine you live in a 2-dimensional universe on the surface of a balloon. If the balloon is being inflated, your universe is expanding (in 3 dimensions, even though you can only perceive 2). You would not be able to identify an "end" to this universe. (Granted, the analogy is imperfect because, in this scenario, if you travel far enough in the right direction, you would arrive back where you started. I don't understand this to be the case in our universe.)

The concept NDT was actually describing with his analogy is the fact that there is no center to the universe, or, if you prefer, every point in space is the center of the universe. In other words, no matter where you are in the universe, you look around and see that other celestial objects are moving away from you in all directions at the same rate. That is because we live on the "surface" of a 4-dimensional balloon that is expanding.
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