Poltergeist is a name for supernatural beings that create physical disturbances, from the German for "noisy ghost". Phobetor is, in Ovid's Metamorphoses, one of the thousand sons of Somnus (Sleep) who appears in dreams in the form of beasts. In 2016, the IAU organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars (including stellar remnants). In its first bulletin of July 2016, the WGSN explicitly recognized the names of exoplanets and their host stars approved by the Executive Committee Working Group Public Naming of Planets and Planetary Satellites, including the names of stars adopted during the 2015 NameExoWorlds campaign. This stellar remnant is now so entered in the IAU Catalog of Star Names. Pulsar Discovery PSR B1257+12 was discovered by the Polish astronomer Aleksander Wolszczan on 9 February 1990 using the Arecibo radio telescope. It is a millisecond pulsar, a kind of neutron star, with a rotation period of 6.22 milliseconds (9,650 rpm), and was found to have anomalies in the pulsation period, which led to investigations as to the cause of the irregular pulses. In 1992 Wolszczan and Dale Frail published a famous paper on the first confirmed discovery of planets outside our solar system. Using refined methods one more planet was found orbiting this pulsar in 1994. Characteristics The pulsar is estimated to have a mass of 1.4 , which is typical for most neutron stars and pulsars. The radius is estimated to be around 10 kilometres (~0.000015 ), also common for pulsars and neutron stars. The pulsar is extremely hot, with a surface temperature of up to around 28,856 K. The pulsar formed one to three billion years ago from a white dwarf merger, a pair of white dwarfs colliding and collapsing to form a rapidly spinning pulsar. The discovery stimulated a search for planets orbiting other pulsars, but it turned out such planets are rare; only five other pulsar planets, orbiting PSR B1620−26, PSR B0943+10, PSR B0329+54, and PSR J1719−1438, have been confirmed. Planetary system Planets In 1992, Wolszczan and Frail discovered that the pulsar had two planets. These were the first discovery of extrasolar planets to be confirmed; as pulsar planets, they surprised many astronomers who expected to find planets only around main-sequence stars. Additional uncertainty surrounded the system, because of a claim of an earlier pulsar planet around PSR 1829-10 that had to be retracted due to