Black

How do you visualize black holes in a spacetime fabric?

Many popular science books make reference to black holes. When I picture a black hole, I tend to think of it as a pin-hole in a balloon….I think of this balloon as a universe surrounded by much less dense region. In this way, I think of a black hole like the drain at the bottom of a bathtub, with the matter sucked into it escaping into some other unknown region.

I visualize the black hole this way because I tend of think of the universe like a big balloon (with boundaries). I know this is not correct, but my brain can’t imagine a black hole floating freely about in the “balloon’s” empty internal volume. Where would the matter escape too?

Question-In-Summary: How should I visualize black holes using some earthly metaphor?
With regard to the first answer below: I saw this documentary a couple of times, and I think it makes the same mistake I do, trying to visualize the universe as some kind of 3 dimentional blob with some galaxies and stars floating about inside of it.

The most common visualization is that of a pool ball on a rubber sheet. The sheet sinks down to a minimum with the ball at the lowest point. This is a good 2d representation. As for 3d, imagine the pool ball sinking into the rubber sheet again, and then add rubber sheets parallel to all of the infinite planes intersecting the ball. The ball also sinks into these. This is a much better picture than the 2d representation, and really shows that the black hole (or any other object) is pulling space in towards itself instead of sinking into space-time like most diagrams show.

We don’t really know if the matter goes somewhere else when it enters the black hole, but theoretically it would become part of the singularity, meaning it would pretty much go nowhere.

Pearl Jam-Black

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