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Term: | Schwarzschild radius |

Definition: |
The critical radius at which a massive body becomes a black hole, i.e., at which light is unable to escape to infinity: R_s = 2GM / c^2, where G is the gravitational constant, M is the mass, and c the speed of light. The formula can be approximated to R_s ≅ 3 x (M/M_sun), in km. Therefore, the Schwarzschild radius for Sun is about 3 km and for Earth about 1 cm. |

Created 2023.04.16

Last Modified 2023.04.16

Contributed by Ryan
McGranaghan

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