" The collapsing star pushes past the resistance of crushed electrons, past the resistance of the neutrons. When the stellar material is compressed enough, the curves in spacetime around the collapsing mass become so sharp that even light can be caught in orbit. As collapse continues, light cannot escape the surface, as though the spacetime spills behind the crushed material faster than light can race outward. A horizon defining the region of no return, the event horizon, is inscribed in the very geometry of spacetime. The event horizon casts a lightless shadow, and a black hole has formed. The black hole is not a star anymore. It’s not really even a thing. The pulverized matter that cast the shadow of the event horizon continues to fall and is gone. The black hole is nothing but its shadow. Wheeler "

― Janna Levin , Black Hole Blues and Other Songs from Outer Space