Pulsars

Pulsars (PULSAting Radio Stars) are ultra-dense dead stars that emit beams of electromagnetic radiation out of their magnetic poles. The radiation emission is viewed only when the beam is pointing towards the Earth. The flashing radio signal or pulse have stable shape, which is used for extracting their clock-like pulse ticks very precisely.
A group of astronomers working under the Indian Pulsar Timing Array (InPTA) have provided the concrete evidence of unexpected changes in a milli-second radio pulsar using upgraded Giant Metrewave Radio Telescope (uGMRT), which is one of the largest radio telescopes in the world located in Pune.