The supermassive black hole at the heart of the galaxy M87 is coming into sharper and sharper focus.Two years ago, astronomers with the Event Horizon Telescope (EHT) project unveiled imagery of that black hole, which lies 55 million light-years from Earth and is as massive as 6.5 billion suns. Those photos were historic — the first direct views of a black hole that humanity had ever captured.In the spring of 2017, as the EHT team was gathering some of the data that would result in the epic imagery, nearly 20 other powerful telescopes on the ground and in space were studying the M87 …
www.space.com/m87-supermassive-black-hole-observing-campaign
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