Astronomers attempting to capture the first images of the black hole at the heart of the Milky Way have given early hints that the ambitious project has been successful. More recently, the gravitational wave observatory Ligo has detected ripples sent out across space-time when pairs of black holes collide. Until now, though, a black hole has never been directly observed. This requires all the telescopes in the array to swivel towards the target black hole and measure every radio wave coming from its direction. The EHT has two primary targets: Sagittarius A*, at the centre of the Milky Way, and a supermassive black hole called M87 in the Virgo cluster of galaxies.

Source: The Guardian January 11, 2019 06:00 UTC