Assertion: pulsar | /r/HasProperty | slowed to longer periods
Facets:
Source sentences:
text: The Crab pulsar is rather young (only about 960 years old) and has a short period, whereas other, older pulsars have already slowed to longer periods.
text: The Crab pulsar is rather young (only about 960 years old) and has a short period, whereas other, older pulsars have already slowed to longer periods.