1 00:00:08,520 --> 00:00:11,080 New test of Einstein’s general relativity 2 00:00:12,420 --> 00:00:18,880 Astronomers have made the most precise test ever of general relativity outside the Milky Way. 3 00:00:19,580 --> 00:00:26,120 They first used ESO’s VLT to measure the gravitational effect of a galaxy by watching how quickly stars zoomed around its centre. 4 00:00:27,120 --> 00:00:33,260 The Hubble Space Telescope was then used to measure another effect of this galaxy’s mass... 5 00:00:34,220 --> 00:00:40,900 ...by observing an Einstein ring caused by light from a background galaxy being bent and distorted. 6 00:00:41,600 --> 00:00:48,340 The two measurements were compared and showed that general relativity correctly describes how gravity works on the scale of galaxies... 7 00:00:49,260 --> 00:00:54,180 ...proving Einstein right and some alternative theories of gravity wrong! 8 00:00:57,400 --> 00:01:02,540 Transcribed by ESO; Translated by —