Assertion: pulsar | /r/HasProperty | formed
Facets:
value: from massive o stars
type: LOCATION
value: from the remains of a supernova
type: OTHER
Source sentences:
text: A pulsar is formed when a massive star collapses exhausts its supply of fuel.
text: A pulsar is a highly magnetised rotating neutron star which was formed from the remains of a supernova -- an explosion which happens after a massive star runs out of nuclear fuel.
text: It will be suggested that pulsars are formed from massive O stars; observational tests of this hypothesis are possible and will be discussed.