Tuesday, June 9, 2026

Orbiting Stars Give Clues to a Quiescent Black Hole's Mass

A JWST image of the highly distorted red galaxy MRG-M0138 seen through a foreground cluster of galaxies (white sources). Via the phenomenon of gravitational lensing, the same background galaxy is multiply imaged four times. Courtesy: NASA/JWST

How do you measure the mass of a dormant black hole in the early Universe? That's a question astronomers at University College London (UCL) and Carnegie scientists wanted to answer about a distant object that is invisible. So, they turned to James Webb Space Telescope (JWST) studies of the region around the black hole to find that answer.



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