Comments:
Pulsars are the rotating cores of long dead stars that destroyed
themselves as supernovae. A supernova occurs when a massive star exhausts its nuclear fuel supply and explosively ejects most of the stellar gas into the surrounding space. The resulting pulsar emits a beam of radio
energy which sweeps across the earth leading to a lighthouse effect every
0.7 seconds. This resembles a heartbeat of 80 beats per minute.