A gravitational singularity, spacetime singularity or just singularity is a "place or time" in which gravity is so intense that spacetime breaks.
A singularity in general relativity is weird:
- a geodesic (a "line" in curved spacetime) is incomplete and gets terminated, and spacetime curvature becomes infinite.
- stars collapsing beyond a certain point (the Schwarzschild radius) would form a black hole, inside which an infinite density and zero volume singularity (covered by an event horizon) would be formed.
- The initial state of the universe, at the beginning of the Big Bang, is also predicted to have been a singularity.
Types of singularities[]
| 0d | Yang monopoles and point particles |
| 1d | Cosmic string |
| 2d | Domain wall |
| Naked | A singularity without an event horizon |
| BKL | The universe is chaotically oscillating around a gravitational singularity in which spacetime is zero |