Assertion: supernova's progenitor | /r/HasProperty | massive star
Facets:
value: at the end of their lives
type: TEMPORAL
Source sentences:
text: The progenitor could have been a massive star that expelled most of its outer layers, or one which lost most of its hydrogen envelope due to interactions with a companion in a binary system, leaving behind the core that consisted almost entirely of helium.
text: The expected progenitors for such supernova are massive stars that respectively lack hydrogen in their outer layers, or lack both hydrogen and helium.
text: ’s progenitor was a binary pair including a white dwarf and a massive star.
text: The progenitors of a Type Ia supernova (SNIa) is a white dwarf accreting matter from a companion, while the progenitors of core-collapse supernovae are massive stars at the end of their lives.