![]() ![]() But physics gets super wonky on these small scales. So it's important to say that, but that's what we've theorised to have happened based off of equations and physics and all of that. black hole cartoon stock illustrations space hand drawing icons. Now, we don't exactly know what is happening at the centre of a black hole and we may never know. futuristic cosmic hand-drawn illustration - rocket flying in a black hole. And so it is that tiny, tiny volume of mass at the centre of a black hole that's spinning. It's just so small that we can just kind of say that it doesn't. You have a lot of mass in this infinitesimally small space, but in reality it does have some volume. The question of what exactly is spinning, well, you have a singularity at the centre of a black hole, and we usually say it's this infinite density thing. ![]() You have a star that's spinning, it collapses in on itself. So you have a star that's spinning much like you have an ice skater that's spinning: they bring their arms in, they spin faster. So when the black hole is collapsing, it's going to keep that momentum of the star that existed before it. ![]() You have to keep the same momentum over time, over everything. And, in physics, just like there's conservation of energy, you have this thing called conservation of angular momentum. Now, all of the stars that we have observed have had some sort of spin, they've all rotated. So you just have gravity forcing itself inward, and that star starts to collapse on itself. But eventually stars are going to run out of this fuel at the centre and you no longer have a big force outward due to nuclear fusion. And that's providing a lot of energy that's stopping the collapse. A black hole is, by definition, unseeable a region of space with a gravitational pull so intense light cannot travel outward to bring us an image. You have gravity that's pulled all of this hydrogen and helium together, and then you have a nuclear fusion at the core that's essentially forcing all of these hydrogen atoms together to form helium and then three heliums together to form a carbon. There's two main processes happening inside a star. Black holes essentially form when you have a star that collapses under its own weight. So in order to understand why black holes rotate, we have to understand how they form. ![]()
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