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Astronomers may have detected a ‘dark’ free-floating black hole
![Lensing bh 750](https://astro.berkeley.edu/wp-content/uploads/2022/06/lensing-bh-750.jpg)
A team of astronomers led by UC Berkeley graduate student Casey Lam and associate professor Jessica Lu has for the first time discovered what may be a free-floating black hole by observing the brightening of a more distant star as its light was distorted by the object’s strong gravitational field — so-called gravitational microlensing.