Editing Astronomical radio source (section)

====Pulsars====
[[Image:Pulsar schematic.svg|thumb|right|Schematic view of a pulsar. The sphere in the middle represents the neutron star, the curves indicate the magnetic field lines, the protruding cones represent the emission beams and the green line represents the axis on which the star rotates.]]
Supernovae sometimes leave behind dense spinning [[neutron stars]] called [[pulsar]]s. They emit jets of charged particles which emit [[synchrotron radiation]] in the radio spectrum. Examples include the [[Crab Pulsar]], the first pulsar to be discovered. Pulsars and [[quasar]]s (dense central cores of extremely distant galaxies) were both discovered by radio astronomers. In 2003 astronomers using the [[Parkes Observatory|Parkes]] [[radio telescope]] discovered two pulsars orbiting each other, the first such system known.