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faisent t1_ivtiyxo wrote

Reply to comment by [deleted] in A first-of-its-kind experiment simulating the cosmos with ultracold potassium atoms suggests that in a curved, expanding universe pairs of particles pop up out of empty space by marketrent

It is, but its also traveling at c so as long as its moving away it won't cross the horizon. It could also be created so its moving towards the horizon as well and there's no change in the system.

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[deleted] t1_ivtmj7i wrote

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Isogash t1_ivusmnm wrote

Gravity doesn't slow down light, it curves spacetime and makes the light need to travel further. The light always travels at the speed of light (in a vacuum.)

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Hanflander t1_ivuzokt wrote

No one has ever described this so concisely in my entire life, thank you.

There’s a light bulb going off above my head now but I can’t see anything because of how dense I feel.

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