Schwarzschild radiusSchwarz·schild radius
The radius of a collapsing celestial object at which gravitational forces require an escape velocity that exceeds the velocity of light, resulting in a black hole.
Origin of Schwarzschild radiusAfter Karl Schwarzschild, (1873–1916), German astronomer.
(plural Schwarzschild radii)
- (astronomy) The radius of an object such that, if all its mass were compressed within that radius, the escape velocity would equal the speed of light