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ferrel_hadley t1_ja7xs85 wrote

If the Universe is infinitely big then the point it came from was infinite.

Current the best evidence is that the Universe is (edited at least) 160 times bigger than the observable Universe. But there is no reason to suggest it is not infinite.

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ExtonGuy t1_ja7zt1s wrote

At least 160 times bigger. Anything from 160x to infinity.

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GXWT t1_ja7z0fq wrote

I ask out of curiosity, but what evidence points to this 160x figure?

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ferrel_hadley t1_ja80mn2 wrote

Curvature. We cannot see any in the observations we have and that places a lower bound on the size of a closed Universe, we would be able to detect curvature if it were smaller.

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phunkydroid t1_ja7zt2i wrote

I think it's important to add "at least" before 160. We can only set a lower bound on the size.

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Anonymous-USA t1_ja85s9z wrote

To clarify, the “evidence” is actually a probabilistic analysis of competing models. The lowest model is about 137 light years across (that is the “at least” 50% larger than observable) and the largest model (“at most”) is infinite. This isn’t a mean or average of these models, mind you, just a statistical probability placing the whole universe at a likely 250x the observable 92 ly.

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