We take it for granted that the speed of light is the universal speed limit; nothing can go faster than light. The knowledge of light-years is crucial to understanding the images that we see in the night sky. These images are not of the celestial bodies as they currently exist, but as they once were, as light has usually taken thousands of years to reach us. There is, however, one phenomenon that exceeds even the speed of light: the expansion of the universe, which was observed to be far faster than the speed of light shortly after the Big Bang.
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This article by BBC Sky at Night Magazine explains the phenomenon. The speed of light is indeed the universal speed limit; however, the universe itself is not bound by this speed limit. The article describes the universe as a “backdrop,” (BBC) rather than a “material thing.” (BBC) Material things within the Universe can not exceed the speed of light, but the backdrop they are on can. This is an extremely abstract concept, but it helps us understand the expansion of the universe.