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For the first time, a wandering black hole has been caught tearing a star apart not in a galaxy’s center, but on its outskirts.
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The center of a galaxy is a bustling metropolis where a giant black hole often snatches inattentive stars. But telescopes caught a flare in a quiet suburb, tens of thousands of light-years from the core. This gave away a wandering black hole — an invisible predator, flung out of the center after an ancient galaxy collision.
It tore apart a passing star, and its death glow revealed familiar elements — hydrogen and helium. This "quiet hunter" weighs about a million suns, a hundred times less than the central behemoths. These wanderers have long hidden in the darkness, but computer algorithms trained to spot such flares will soon help discover dozens of them. The outskirts of galaxies may be teeming with these invisible predators: we just need to listen more closely to their "meals."
This is the first confirmed case of a wandering black hole caught "dining" far from the galactic center.