The Sound Of A Black Hole, Recorded By NASA's Chandra X-Ray Observatory

May 5, 2022

NASA has recorded the sound of a black hole using data from their Chandra X-Ray Observatory.

black hole sound
A black hole

Since 2003, the black hole at the center of the Perseus galaxy cluster has been associated with sound. This is because astronomers discovered that pressure waves sent out by the black hole caused ripples in the cluster's hot gas that could be translated into a note – one that humans cannot hear some 57 octaves below middle C.

Now a new sonification brings more notes to this black hole sound machine. This new sonification – that is, the translation of astronomical data into sound – has been released for NASA's Black Hole Week this year.

The popular misconception that there is no sound in space originates with the fact that most of space is essentially a vacuum, providing no medium for sound waves to propagate through. A galaxy cluster, on the other hand, has copious amounts of gas that envelop the hundreds or even thousands of galaxies within it, providing a medium for the sound waves to travel.

In this new sonification of Perseus, the sound waves astronomers previously identified were extracted and made audible for the first time. The sound waves were extracted in radial directions, that is, outwards from the center. The signals were then resynthesized into the range of human hearing by scaling them upward by 57 and 58 octaves above their true pitch. Another way to put this is that they are being heard 144 quadrillion and 288 quadrillion times higher than their original frequency.

Listen to the black hole below.

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