Gravitational singularities are mainly considered in the context of general relativity, where density apparently becomes infinite at the center of a black hole, and within astrophysics and cosmology as the earliest state of the universe during the Big Bang/White Hole.

Do singularities exist in nature?

Naked singularities have not been observed in nature. Astronomical observations of black holes indicate that their rate of rotation falls below the threshold to produce a naked singularity (spin parameter 1).

What is a singularity in astronomy?

A singularity is a region of space where the curvature of spacetime becomes infinite. Due to the cosmic censorship conjecture, most singularities are hidden behind event horizons. Singularities are regions of space where the density of matter, or the curvature of spacetime, becomes infinite.