How Time Becomes Space Inside a Black Hole | Space Time
PBS Space Time4 HN recommenders · recommended in 4 months, 2018-2025
2.5M views · 9 years ago · explainer · evergreen
A PBS Space Time episode explaining how space and time swap roles inside a black hole's event horizon. It is part of the channel's black hole series.
Recommended as the cleanest visual explanation of time and space switching roles past the horizon, and a gateway to the channel's black hole videos.
14:25Do Events Inside Black Holes Happen?
PBS Space Time
3.2M views • 11 years ago
19:59What Happens at the Event Horizon? | Space Time | PBS Digital Studios
PBS Space Time
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13:01Could The Universe Be Inside A Black Hole?
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11:51Does Time Cause Gravity?
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8:55Are Space and Time An Illusion?
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12:06Hawking Radiation
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16:07The Geometry of Causality
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13:34Did Time Start at the Big Bang?
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15:30The Black Hole Information Paradox
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18:05The Crisis in Cosmology
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12:21What If Dark Matter Is Just Black Holes?
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16:29Are Black Holes Actually Fuzzballs?
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18:30What Happens After the Universe Ends?
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16:43The Equation That Explains (Nearly) Everything!
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7 comments from Hacker News
What happens inside a black hole is basically unknowable. We can only ponder the math which leads to ideas like space and time swapping roles once you cross the event horizon.[0] The only thing that comes out is hawking radiation, which is sort of like... half of nothing. [0] ▶ this video
Apologies for replying to my own post, but I should have included sources. Here is the best stuff I've found so far: link link link There is an episode of How the Universe Works (I think) where they talk about the multiverse looking like an infinite block of swiss cheese, and each black hole having a child universe inside with its own physics, sealed off from the parent universes. So we're in the black hole where the rules of physics allow us to exist to realize it. In other words, the multiverse used black holes to evolve the rules of physics until consciousness could exist. It's another interpretation of the anthropic principle so isn't really testable, but I thought it was elegant. Wish I could find it. Edit: some places to start: ▶ this video link
PBS Space Time to the rescue: What Happens at the Event Horizon? - link What’s On The Other Side Of A Black Hole? - link How Time Becomes Space Inside a Black Hole - ▶ this video The Black Hole Information Paradox - link
link I hope it helps. I think this is the cleanest explanation with actual visual representation. Edit: Sorry this one is even better. How Time Becomes Space Inside a Black Hole | Space Time ▶ this video
> ...at the same moment. As an aside, this is a rather funny phrase to be using about objects so massive that time and space actually switch roles inside their event horizons compared to the normal universe. I don't feel like I can explain it very well, but here is a video that does so: ▶ this video (Skip to about 5:15 for the good stuff.)
This is from PBS Spacetime series [1]. A fantastic channel, and they did a number of videos on black holes. [1] ▶ this video
I just realized I was replying to the wrong parent comment! So sorry. I was talking about a PBS Space Time episode on YouTube I saw in (or came across via) a different comment. ▶ this video