What is a black hole singularity?

A black hole singularity is a point of infinite density and zero volume at the center of a black hole.

Black holes are formed when a massive star collapses under its own gravity, creating a region of space where the gravitational pull is so strong that nothing, not even light, can escape. At the center of a black hole is a singularity, a point where the laws of physics as we know them break down. The singularity is infinitely dense and has zero volume, meaning that all the mass of the black hole is concentrated in a single point.

The singularity is surrounded by the event horizon, the point of no return beyond which anything that enters the black hole is trapped forever. The event horizon is defined by the escape velocity, the speed required to escape the gravitational pull of the black hole. Since the escape velocity at the event horizon is greater than the speed of light, nothing can escape from within the event horizon.

The singularity is a theoretical concept that has not been directly observed, as any object that enters a black hole is destroyed by the tidal forces before it reaches the singularity. However, the effects of the singularity can be observed indirectly through the gravitational effects on nearby objects. The study of black holes and their singularities is an active area of research in astrophysics and cosmology.