PSR J1909-3744 (a specific pulsar)

PSR J1909-3744 is a millisecond pulsar, a highly magnetized, rotating neutron star that emits regular radio pulses. Located roughly 3,500 light-years away in our galaxy, it rotates incredibly fast—about 2,000 times per second—and serves as a precise cosmic clock. Its stable pulses help scientists test theories of gravity, detect gravitational waves, and study the properties of neutron stars. Discovered in 2004, PSR J1909-3744 is notable for its precise timing, making it a valuable tool in astrophysics research.