Assertion: black hole | /r/CapableOf | take on their modern form
Facets:
value: in 1916
type: TEMPORAL
Source sentences:
text: Black holes began to take on their modern form in 1916 when the German astronomer Karl Schwarzschild (1873–1916) used Einstein's general theory of relativity to find out what would happen if all the mass of an object were squeezed down to a dimensionless point – a singularity.