Pulsar-Planet
Pulsar planets are exoplanets orbiting pulsars or neutron stars. The first of these planets discovered around a millisecond pulsar and was also the first exoplanet that was discovered. Pulsar planets are by the pulsar timing method could be found, so anomalies over the pulse period. All celestial bodies that orbit a pulsar, causing periodic changes in the pulse period. Since pulsars with a very constant speed rotate, deviations can be relatively easily determined with precision measurement methods.
In 2006 it was discovered that the pulsar 4U 0142 61, 13,000 light-years from Earth, has a protoplanetary disk. The discovery was made by a team led by Deepto Chakrabarty of the Massachusetts Institute of Technology using the Spitzer Space Telescope. The plate was probably made from metal-rich deposits of a supernova that formed the pulsar about 100,000 years ago. It is similar to those that are found around sun-like stars, which suggests that also form like planets. Pulsar Planets can probably accommodate no life as we know it because of the high degree of ionizing radiation that emits the pulsar, and the associated shortage of visible light makes any known form of life impossible.
List of known pulsar planets
Note: MJ thinks the mass of Jupiter, and ME the mass of the Earth.