Science
How to weigh a black hole: monitor its fireworks – Nature.com
The dusty disk around a black hole flashes on a characteristic schedule, offering a clue to its mass.
Astrophysicists might have found a way to estimate the masses of supermassive black holes by observing their feeding frenzies.
The centres of most galaxies harbour supermassive black holes, which have masses up to several billion times that of the Sun….
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