A Neutron Star Spins Like a Lighthouse
A neutron star can rotate hundreds of times per second, sending beams of radio waves into space that sweep past Earth like a lighthouse beam. These rapidly spinning objects, called pulsars, are the collapsed cores of massive stars and measure only about 20 kilometers across yet contain more mass than our Sun.
💡 Fun detail:
Some pulsars are so precise that they rival atomic clocks, helping scientists test theories of gravity across the galaxy.
Source: NASA