http://www.sciencemag.org/news/2019/04/here-s-what-scientists-think-black-hole-looks

Jean-Pierre Luminet’s 1979 black hole visualization. Using computer data, he drew several thousand black dots on a white sheet by hand and took a photographic negative to get the final image. Gas racing around the black hole toward us is brighter from a Doppler boost. The part of the gas disk behind the black hole is visible above it, because its light has been bent by the black hole’s gravity.

More than half a dozen scientific press conferences are set for 10 April, raising hopes that astronomers have for the first time imaged a black hole, objects with gravitational fields so strong that even light cannot escape. While their existence is now almost universally accepted, mostly from the effect of their gravity on nearby objects, no one has actually seen one.