Assertion: pulsar's planet | /r/HasProperty | discovered around pulsar
Facets:
value: in 1992
type: TEMPORAL
Source sentences:
text: The first extrasolar planets were discovered around a pulsar, PSR B1257+12.
text: In fact, the first extrasolar planets were discovered around a pulsar in 1992, when astronomers Aleksander Wolszczan and Dale Frail announced the discovery of a multi-planet planetary system around PSR B1257+12 – a millisecond pulsar now known to have two extrasolar planets.