Assertion: nebula's mass | /r/HasProperty | low
Facets:
Source sentences:
text: Since a supernova can occur whenever the mass of the star at the time of core collapse is low enough not to cause complete fallback to a black hole, any massive star may result in a supernova if it loses enough mass before core collapse occurs.
text: Fully half the objects seen are substellar, objects up to 70 or so times the mass of Jupiter; too low mass to ignite fusion in their cores to become true stars.