/u/CptCreosote's posts in /r/askscience

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If the universe is infinite and everything that can happen will happen, could I travel to a point in space where the universe is exactly the same as where I left? Effectively getting back to where I started even though I've traveled trillions of light years in one direction?

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Is it possible that a black hole simply elongates the EM frequency to impossibly long wavelengths, so much so that it appears black to all our instruments?

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As gravitational waves give us a new way of observing the universe, would it be possible to infer the interior of a blackhole by observing these waves?

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Are black holes black because they just emit hyper-redshifted light, or are they actually black? It doesn't make sense to have infinite density, does it?

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When astronauts are doing a spacewalk and they look at the stars or the moon do they get a sense of distance or perspective? Can they tell a star is closer than another?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If the universe is infinite and everything that can happen will happen, could I travel to a point in space where the universe is exactly the same as where I left? Effectively getting back to where I started even though I've traveled trillions of light years in one direction?	1
Is it possible that a black hole simply elongates the EM frequency to impossibly long wavelengths, so much so that it appears black to all our instruments?	1
As gravitational waves give us a new way of observing the universe, would it be possible to infer the interior of a blackhole by observing these waves?	1
Are black holes black because they just emit hyper-redshifted light, or are they actually black? It doesn't make sense to have infinite density, does it?	1
When astronauts are doing a spacewalk and they look at the stars or the moon do they get a sense of distance or perspective? Can they tell a star is closer than another?	0