This animation takes us into a spinning pulsar, with its strong magnetic field rotating along with it. Clouds of charged particles move along the field lines and their gamma-rays are beamed like a lighthouse beacon by the magnetic fields. As our line of sight moves into the beam, we see the pulsations once every rotation of the neutron star. Note: This animation shows gamma-rays from a pulsar Animator: Walt Feimer (HTSI). Scientist: Alice Harding (NASA/GSFC), Steven Ritz (NASA/GSFC). Platforms/Sensors/Data Sets: Fermi/LAT.