"Curiosity is one of the permanent and certain characteristics of a vigorous intellect" By Samuel Johnson One of the curious doubts asked by a physics lover on "The Grand Old Universe" was :- ' Why it was difficult to get a picture of black hole earlier? What are the changes in technology that made it possible? ' I, The Physics Expert will crear that doubt in this post The answer is :- The work that allowed this photo to be taken has been going on for decades. It meant overcoming difficulties that have seemed impossible. The central difficulty with trying to get pictures of black holes is given away in their name: they are black because they have such a strong gravitational pull that light falls into them and can’t escape. As such, it can’t get to here and we can’t take a photograph of it. To get through all of that difficulty, astronomers had to work to join eight different dishes up into one huge virtual telescope, allowing the
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