Assertion: nebula's star | /r/CapableOf | approach stable end state
Facets:
value: as "black dwarf"
type: MANNER
value: after many billion years
type: TEMPORAL
Source sentences:
text: The cooling process of the white dwarf goes on until all thermal energy is radiated, and the star approaches a stable "end state" as "black dwarf" after many billion years - the universe is probably still much too young to contain any "cooled-out" black dwarf.