Listen to eerie sounds from echoing black holes
CNN
Millions of elusive black holes hide in plain sight across the Milky Way galaxy. Astronomers are using the X-ray echoes released by these extreme cosmic objects to find them -- and they make some eerie sounds in the process.
Astronomers have been able to pin down the locations of eight rare pairings of black holes and the stars orbiting them, thanks to the X-ray echoes they release. Previously, there were only two known pairs emitting X-ray echoes in our galaxy.
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