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Is a "vacuum" absolutely, completely empty of everything, every field, every virtual particle/particle pair, every real particle? Or are what we call vacuums not actually completely empty?

1 upvotes • r/askscience

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Can someone explain, with minimal math, why Roger Penrose's theory of singularities requires the universe to be infinite in size?

1 upvotes • r/askscience

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Are vacuums absolutely, completely devoid of physical particles?

1 upvotes • r/askscience

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If there's a singularity at the center of every black hole, shouldn't the gravitational pull of black holes be infinite, as a singularity is, by its very definition, something with an infinite density?

0 upvotes • r/askscience

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Title	Upvotes	Subreddit	Mark as read	Favorited	Rating	Add to a list
Is a "vacuum" absolutely, completely empty of everything, every field, every virtual particle/particle pair, every real particle? Or are what we call vacuums not actually completely empty?	1	askscience
Can someone explain, with minimal math, why Roger Penrose's theory of singularities requires the universe to be infinite in size?	1	askscience
Are vacuums absolutely, completely devoid of physical particles?	1	askscience
If there's a singularity at the center of every black hole, shouldn't the gravitational pull of black holes be infinite, as a singularity is, by its very definition, something with an infinite density?	0	askscience