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Message Boards  Gravitational singularity  A gravitational
singularity occurs when an astrophysical model, typically based
on general relativity, predicts a point of infinite curvature.
The term is closely related to the mathematical meaning of
"singularity": a gravitational singularity occurs when the
equations produce a mathematical singularity. The Big Bang
cosmological model of the universe contains a gravitational
singularity at the start of time (t=0). At the "Big Bang
Singularity," the model predicts that the density of the
universe and the curvature of space-time are infinite. However,
the basic Big Bang model does not include quantum effects, so
its predictions are valid only shortly after the projected
singularity. A singularity also exists within a black hole,
where general relativity predicts a region of infinite
curvature. In a non-rotating black hole, the singularity occurs
at a single point in the model coordinates, and is called a