PTA (Pulsar Timing Array)

A Pulsar Timing Array (PTA) is a scientific method that uses highly precise measurements of pulsars—rotating neutron stars emitting regular radio pulses—to detect gravitational waves. By monitoring multiple pulsars spread across the sky, scientists look for tiny variations in arrival times of the pulses caused by passing gravitational waves, ripples in spacetime produced by massive cosmic events like merging black holes. This technique allows researchers to indirectly observe gravitational waves at very low frequencies, complementing other methods like LIGO, and helps us understand phenomena in the universe that generate these spacetime disturbances.