Assertion: pulsar's beam | /r/HasProperty | observed on earth
Facets:
value: with periods
type: OTHER
value: as short, regular pulses
type: OTHER
Source sentences:
text: Because the pulsar's magnetic poles do not align with the poles of its rotational axis, the beams of radiation sweep around like the beacon of a lighthouse and are thus observed on Earth as short, regular pulses, with periods anywhere between 1 millisecond and 4 seconds.