the radius of a sphere (Schwarzschild sphere) surrounding a non-rotating uncharged black hole, from within which no information can escape because of gravitational forces
Word origin
C20: named after Karl Schwarzschild (1873–1916), US astrophysicist
Schwarzschild radius in American English
(German ˈʃvɑːʀtsˌʃɪlt, English ˈʃwɔrtsˌtʃaild, -ʃɪld)
noun
Astronomy
the radius at which a gravitationally collapsing celestial body becomes a black hole
Word origin
[1955–60; named after Karl Schwarzchild (1873–1916), German astronomer]This word is first recorded in the period 1955–60. Other words that entered Englishat around the same time include: geodesic dome, new wave, rite of passage, rollout, software