What does the balloon analogy demonstrate about the expansion of the universe?
Answer
That the distance between points increases as the surface area grows
The balloon analogy is used to visualize how space expands. If one draws dots on a balloon representing galaxies and then inflates it, the distance between the dots increases. Importantly, no individual dot is necessarily moving fast; rather, the surface of the balloon itself is enlarging. This illustrates that the expansion of the universe is not objects racing through space, but the space between objects growing larger.
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