A singularity is a rules violation in math. Sometimes when the math describes physics, that results in a physical limit, like the coldest possible temperature or the speed of light.
The black hole singularity occurs when you look at the speed to orbit a star. The more massive the star, the faster you have to go. there reaches a point where too much mass means you can’t orbit the star without exceeding the speed of light. Our mathematical representation of orbital mechanics fails, and no force can get your spaceship back.
Perhaps this is a bug in our math. We had some math problems with the speed of airplanes, but we invented some new hypersonic equations to represent what’s happening at those high speeds. However, nobody in the physics community thinks the speed of light isn’t a real, actual, you can’t go faster, kind of limit.
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