Concept information
Preferred 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. (en)
Broader concept
- Schwarzschild metric (en)
Entry terms
- Gravitational radius (en)
Scope note
- Limiting radius of black hole (en)
Contributor
Editorial note
URI
http://astrothesaurus.org/uat/1435
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