Physicist Brian Cox explains: "As for radio telescopes, we have direct observation of two of them from the Event Horizon collaboration. One of the galaxy's black holes called M87, located about 55 million light years, is so supermassive its mass is more than 6 billion times that of our sun We also have an image of this rather smaller supermassive black hole at the center of the Milky Way. We believe that virtually all galaxies have. a supermassive black hole at their core a bit – because a few papers have been published recently suggesting that there might be galaxies observed where there are no supermassive black holes. universe, there may be exceptions, but it's fair to say that virtually every galaxy has a black hole at its center./"

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