Pulsars are dense, small (about 12km) stars that form when a massive star goes supernova. They release a lot of radiation and spin VERY fast! so... watch the pulsar go BRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
To get the sound: www.nasa.gov/mission_pages/chandra/multimedia/vela2012.html Thanks to @SpaceX-Aerospace !
