Assertion: nova's companion star | /r/HasProperty | red giant
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: The first is that a white dwarf star, which is the remnant of a low-mass star that has exhausted its nuclear fuel, undergoes a thermonuclear explosion after its mass is increased beyond its Chandrasekhar limit by accreting nuclear-fuel mass from a more diffuse companion star (usually a red giant) with which it is in binary orbit.