NASA Recorded The Sound From a Black Hole, and It's Super Eerie

NASA has released a haunting audio clip of sound waves rippling out of a 250 million light-years-away supermassive black hole.

The black hole is at the heart of the Perseus galaxy cluster, and the acoustic waves it emits have been transposed up 57 and 58 octaves to be audible to humans.

It is the first time that these sound waves have been extracted and rendered audible.

So, what exactly is going on in this recording? We can't hear sound in space, but that doesn't mean it doesn't exist.

Astronomers discovered something truly amazing in 2003: acoustic waves propagating through the massive amounts of gas surrounding the supermassive black hole at the centre of the Perseus galaxy cluster, which is now famous for its eerie wails.

We couldn't hear them at their current volume. The waves contain the lowest note ever detected by humans in the Universe - well below the limits of human hearing.

However, this recent sonification has not only raised the recording by several octaves, but it has also added to the notes detected from the black hole, giving us a sense of what they would sound like ringing through intergalactic space.

To be clear, these data were not originally sound waves like the Perseus audio, but rather light at various frequencies. 

The radio data has the lowest pitch in the sonification at the lowest frequencies. Optical data is in the middle with X-rays at the top.