- Black holes are massive astrophysical objects with no surfaces, which have a region of no return called the event horizon12. They are predicted by the theory of general relativity (GR), which describes how gravity affects the fabric of spacetime12. The spacetime around a black hole is described by a unique solution of the GR field equations, called the Kerr-Newman metric, which hides any singularities or spacetime pathologies behind horizons2.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.The most fundamental prediction of GR is the existence of black holes (BH). The defining property of a BH is the event horizon, a “one-way” membrane in the fabric of spacetime that defines the boundary between regions (inside and outside the BH) that are causally disconnected.blackholecam.org/general-relativity/The Kerr-Newman metric is the unique vacuum solution of the General Relativistic field equations, in which any singularities or spacetime pathologies are hidden behind horizons. They are believed to describe the spacetimes of massive astrophysical objects with no surfaces, which we call black holes.arxiv.org/abs/2304.09984
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