Schwarzschild radius

noun

Schwarz·​schild radius

ˈshwȯrtˌshild-,

ˈs(h)wȯrtsˌchīld-;

ˈshvärtˌshilt-

: the radius of the spherical boundary within which a given mass (as of a star) must collapse to become a black hole

also : the distance of the event horizon from the center of a black hole

Word History

Etymology

after Karl Schwarzschild †1916 German astronomer

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