7/2/2023 0 Comments Black hole comicIt’s just that you’re occupying a 3D slice of the 4D space-time that doesn’t include it. You might not see it from an infinitely far distance away, but it is real, and it is still there. The event horizon isn’t just a spatial surface, it’s a space-time hypersurface. *As an aside, this why those people who tell you “a black hole event horizon never forms” or “events inside a black hole never happen” are wrong. A real black hole you try to jump through would 1) have formed at some point and 2) have matter in it because you just jumped into it. It’s mostly there to lead up to what a black hole is by stating clearly what it is not.Ī vacuum cleaner-Unless you get close to a black hole (say within 3 radii of a non-rotating black hole’s radius of circumference) orbiting it works mostly the same as any other celestial body.Ī very dense object – The physical scales of stellar black holes are similar to neutron stars, but unlike a neutron star, a black hole is a space-time region, not a solid object with a density and definite volume.Ī 2D hole or funnel – black holes are space-time objects and so are more properly thought of as 4D objects*.Ī portal to another realm – only idealized black holes that have existed forever and have no matter anywhere in them can have wormholes that lead to other places. The final comic I had planned for that planetarium show.
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