I've known for a while that the universe is expanding, and that objects within the universe are moving farther and farther away from each other. But one thing that fascinates me is the rate of this expansion, which is said to be faster than light (but that doesn't violate relativity). What's even more interesting is that the rate of expansion continues to accelerate, but as far as I know, there is no limit. That last part is really just speculation on my part, but it really makes me wonder, is there a limit to the rate of expansion? It already moves faster than light, so we can't apply the same limit as we do to material objects.