of at least two planets around the pulsar PSR 1257+12.
Wolszczan discovered the pulsar in the constellation Virgo in 1990.
that the pulsar has planets that orbit and tug at it.
AU and 1.1 AU from the pulsar.
the second at least 2.8 times.
is a fast-spinning millisecond pulsar, rotating every 6.2 milliseconds.
In contrast, the other pulsar, PSR 1829-10 has a period of 0.3 seconds.
their rapid spins by having material dumped on them from an orbiting star.
onto the pulsar and no longer exists.
gas left over from the companion’s death.