Using the James Webb Space Telescope, and with a little help from Einstein, astronomers have "weighed" a sleeping giant, a dormant supermassive black hole located a staggering 10 billion light-years away.

James Webb Space Telescope weighs 'sleeping giant' black hole from 10 billion light-years away — and it's 6 billion times our sun's mass

Source: space
Source Link: https://www.space.com/astronomy/james-webb-space-telescope/james-webb-space-telescope-weighs-sleeping-giant-black-hole-from-10-billion-light-years-away-and-its-6-billion-times-our-suns-mass