The images are captured by the Event Horizon Telescope (EHT), an worldwide cooperation program jointly established by more than 200 researchers around the world.
Katie Bouman, a computer scientist, took the lead on creating the algorithm that made it possible to take the photo 55 million light-years away from Earth. While astronomers have been talking about "dark stars" since 1700s, the community eventually speculated that these bright spots were in fact "black holes", with American physicist John Archibald Wheeler coming out with the term in the mid-1960s.
He said: "The history of man and of science will be divided into the time before the image and the time after the image".
Black holes are formed when huge stars collapse at the end of their life cycle, but because they do not allow light to escape, it can be hard to see them.
Researchers say their findings help offer further support of Einstein's Theory of Relativity, first announced in 1915.
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If a dying star is massive enough, on the order of 10 or 20 times as massive as our sun, it's likely to collapse into a black hole when it dies.
The photograph depicts a ring of light surrounding a shadow, which researchers at EHT explain is caused by "gravitational bending and capture of light by the event horizon". It needs to be this big because although Sagittarius A is massive, about 4 million times as massive as our sun. What you're actually seeing is one of the most powerful forces in the universe sucking in everything around it, and it's just the beginning for the Event Horizon Telescope.
Scientists may show us something Wednesday morning that we've never seen before - a picture of a black hole. Usually, the more mass there is, the larger the black hole.
One aspect Gammie's team honed in on was how black holes interact with their environments.
Also trending in the wake of the black hole news alongside the band was the movie "Interstellar".
Eight telescopes across the globe participated in the observations in 2017.