The story about the imaging of a Black Hole in M87 was fairly prominent news last week, but most articles were pretty brief. Thes articles in the links below get at some of the details most articles miss.
Temming, Maria, “How Scientists took the first picture of a black hole”, Science News, https://www.sciencenews.org/article/event-horizon-telescope-black-hole-picture
Koren, Marina, “The Hidden Shipping and Handling Behind that Black-Hole Picture”, The Atlantic. https://www.theatlantic.com/science/archive/2019/04/black-hole-hard-disks-picture/587119/