Astronomers believe they may form when a large cloud of gas up to 100,000 times bigger than the sun, collapses into a black hole. Alternatively, a supermassive black hole seed could come from a giant star, about 100 times the sun's mass, that ultimately forms into a black hole after it runs out of fuel and collapses. The effort is essentially working to capture a silhouette of a black hole, also commonly referred to as the black hole's shadow. Not all of it reaches an observer, some falls in and some goes into orbit around the black hole and appears as a series of rings surrounding the black hole, Younsi told MailOnline. It is very difficult as you have an 'interstellar scattering' of stars and light sources between the Earth and the black hole that move at different rates, making it harder to directly image the black hole.

Source: Daily Mail March 24, 2021 14:00 UTC