Pulsars

 Pulsars are highly magnetized, moving around neutron stars which produce a beam of visible electromagnetic radiation in the form of radio waves. Their observed periods range from 1.5 ms to 8.5 s. The radiation can only be seen when the beam of discharge is pointing towards the Earth.
 * __Pulsars__**

This is called the lighthouse effect and gives rise to the pulsed nature that gives pulsars their name. Because neutron stars are very thick objects, the revolving time and the interval between observed pulses are very regular. For some pulsars, the reliability of pulsation is as exact as an atomic clock. Pulsars are known to have planets orbiting them.