Assertion: mass black hole | /r/HasProperty | known to science
Facets:
value: currently
type: TEMPORAL
Source sentences:
text: J05215658+4359220 was reported to host the smallest-mass black hole currently known to science, with a mass 3.3 solar masses and a diameter of only 19.5 kilometers.
text: The smallest mass black hole known to science is 3.8 solar mass having a diameter of 15 miles.