Black widow pulsar
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The black widow pulsar (PSR B1957+20) is a binary millisecond pulsar in the constellation of Sagitta, 6,500 light years from Earth. It is binary with a brown dwarf which scientists have not named yet, these systems are very rare, especially with a millisecond pulsar. The pulsar spins every 1.6 milliseconds, that about 612 times every second. The pulsar's magnetic field is about 10^8 Gauss, about 200,000,000 times stronger then Earth's magnetic field.
Discovery
changePSR B1957+20 was discovered in the year 1988 by Andrew S. Fruchter, S. R. Kulkarni and George Djorgovski, they used the Arecibo Observatory radio telescope in Puerto Rico.