Assertion: quasar | /r/HasProperty | large black holes
Facets:
value: really
type: DEGREE
Source sentences:
text: Astronomers think that quasars are really large black holes that capture large amounts of matter from the surrounding galaxy, and that that matter radiates away a lot of energy while it falls towards the black hole, not just as visible light but also as, for example, radio waves and X-rays.