ALMA 'Weighs' Monster Black Hole to Highest Precision - Discovery News

Discovery News
ALMA 'Weighs' Monster Black Hole to Highest Precision
Discovery News
Though we know black holes are kinda big, how do astronomers measure their mass? It's not as if we can go out there and simply “weigh” them. Fortunately, astronomers have many tricky ways to work out the mass of objects in the universe and black holes ...
ALMA measures mass of black hole with extreme precisionAstronomy Magazine
Astronomers find a supermassive black hole with the mass of 664 mill