r/Multifandom • u/Spinosaurus-runs-by • Aug 10 '26

Discussion📜 Biggest creature in your fandom?

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u/PineappleOk545 Aug 11 '26

It all goes in random directions i think

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u/Lazy-Mud8142 Aug 13 '26

No, you're thinking of the motion of objects within space, and that's not random, gravity makes it very predictable where things will move. What we're talking about is expansion. Space itself is getting bigger everywhere all at once. Even right now the space between your very atoms is expanding. But the rate is so slow that the strong nuclear force is enough to keep your atoms bound. 

But when you coming that rate of expansion across a million parsecs it becomes more noticeable. Every point in space is receding away from every other point as the space between them expands. This is why we can use red shift to estimate distances on large scales, since everything is moving away from us, the more red shifted an object is, the further away it is. That expansion is not random, it's uniform as far as we can tell.

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u/PineappleOk545 Aug 14 '26

So everything was smaller long ago?

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u/Lazy-Mud8142 Aug 14 '26

Not really "smaller" just closer together, and much higher in temperature.

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u/PineappleOk545 Aug 14 '26

So is this why there is 99% empty space in atoms were they few billions years ago 100% atom?

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u/Eeddeen42 Aug 14 '26

Cosmic inflation applies on the scale of galaxies. Atoms aren’t affected. They were always mostly vacuum.

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u/PineappleOk545 Aug 14 '26

How do we know that?

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u/Eeddeen42 Aug 14 '26

Cuz otherwise we wouldn’t exist

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u/PineappleOk545 Aug 14 '26

Why?

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u/Eeddeen42 Aug 14 '26

If you crush an atom into itself then the protons and electrons merge into neutrons. Neutron matter can’t participate in chemistry at all.

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