Assertion: pulsar | /r/HasProperty | psr b1937
Facets:
Source sentences:
text: In the case of Kulkarni's pulsar, PSR B1937+21, these kinds of timing variations have recently suggested the presence of objects as small as asteroids.
text: The pulsar, known as PSR B1937+21, became the first of a new class of remarkable objects called millisecond pulsars.