re: Hubble data: Universe "weirdly" expanding faster than expected.

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If the universe is expanding, doesn’t that imply it all must be diverging from a single point?

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No. That would happen if there is an explosion in space. The big bang and the expansion we see is an "explosion" of space.

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Have we found that point?

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If you try to find the center point of expansion, it turns out that no matter where you look that point appears to be the center. That's how we know that space itself is expanding.