Assertion: millisecond pulsar | /r/HasProperty | stable
Facets:
value: by the way
type: OTHER
value: extremely
type: DEGREE
Source sentences:
text: Millisecond pulsars are so stable that astronomers have measured their spin periods to an accuracy of one part in a million trillion (that's 18 decimal places).
text: Those millisecond pulsars, by the way, are extremely stable rotators; the best are at least as stable as atomic clocks!