NASA has released a haunting audio clip of sound waves rippling out of a supermassive black hole, located 250 million light-years away.
The black hole is at the center of the Perseus cluster of galaxies, and the acoustic waves coming from it have been transposed up 57 and 58 octaves so they're audible to human hearing.
We wouldn't be able to hear them at their current pitch. The waves include the lowest note in the Universe ever detected by humans – well below the limits of human hearing. The sound waves were extracted radially, or outwards from the supermassive black hole at the center of the Perseus cluster, and played in an anti-clockwise direction from the center, so that we can hear the sounds in all directions from the supermassive black hole at pitches 144 quadrillion and 288 quadrillion times higher than their original frequency.transposed into audio frequenciesThe sounds aren't just a scientific curiosity, though.
That heat is what allows us to detect the sound waves, too. Because the intracluster medium is so hot, it glows brightly in X-rays. The Chandra X-ray Observatory allowed not only for the detection of the sound waves initially, but for the sonification project.
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