In earlier studies,

 In earlier studies, 


we discovered the black holes with the most voracious appetite. Last year, we found a black hole that eats an Earth's-worth of stuff every second. In 2018, we found one that eats a whole sun every 48 hours.

But we have lots of questions about their actual feeding behavior. We know material on its way into the hole spirals into a glowing "accretion disk" that can be bright enough to outshine entire galaxies. These visibly feeding black holes are called quasars.

Most of these black holes are a long, long way away—much too far for us to see any detail of the disk. We have some images of accretion disks around nearby black holes, but they are merely breathing in some cosmic gas rather than feasting on stars.

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