Astronomers have detected evidence of gravitational waves from supermassive black holes at the centres of merging galaxies. <\/p>
How do you measure ultra-low-frequency gravitational waves<\/a> coming from the centres of distant galaxies?<\/p>\n By observing their effect on cosmic clocks of course!<\/p>\n This episode Dr Michael Keith, an astrophysicist at the University of Manchester<\/a>, reveals how detecting subtle changes in the regularity of pulsars<\/a> is providing a new way of observing the cosmos.<\/p>\n You can watch the video and listen to the audio versions of this podcast below.<\/p>\n Find out more about the discovery via our news story \u2018Galaxy-sized\u2019 detector measures echos of colliding black holes<\/a><\/strong><\/em><\/p>\nVideo<\/strong><\/h2>\n