What does a black hole sound like? Here is his “music” recreated by NASA-

from Lorenzo Nicolao

Audio obtained thanks to the Chandra X-ray telescope. The observation of the ripples of hot gas caused by the celestial body is fundamental

Is it possible to recover sounds from the universe, a context with very different conditions compared to those of the Earth? Until some time it seemed not, yet NASA researchers have published the results of an unprecedented operation. The pressure waves emitted by a celestial body such as a black hole have been converted into “sound waves”, therefore perceptible to human beings. The black hole that causes ripples of hot gas in the galaxy cluster was chosen as an example Perseusdistant beyond 240 million light years from our planet. To get an audible result they were therefore first translated astronomical datathen considerably increased the frequency of the notes collected. This was possible thanks to periodic explosions that occur inside the celestial body, located right in the center of a cluster that contains thousands of galaxies. Astronomers suspect that the ripples in the hot gas may be caused by the phases of star formation, a phenomenon that makes the black hole inside Perseus a source of noises, groans and groansheard for the first time thanks to the translation process and widespread simulation.

The instrument

Le “where sound”, which can be heard in a video released by the same space agency, were recovered in the form of astronomical data, and then translated into audio. Fundamental tool to carry out the operation Chandraan orbital telescope that NASA has been using since the early 2000s for observing the sky through i X-ray. Thanks to the powerful telescope, formed by four mirrors, which provides at least twenty-five times greater definition images than previous X-ray telescopes, Chandra has provided a large amount of data in its first five years of operation. The discoveries made thanks to the observations of this powerful telescope concern a greater understanding of supernovae, star clusters, galaxies and various celestial bodies. This instrument is therefore also useful for the study of an intense gravitational field such as that of a black hole, which does not let either matter or electromagnetic radiation escape. Black holes are thus difficult to observe, but thanks to current technology the Nasa she managed to capture “the voice”.

The result

It should be considered that sound in a vacuum cannot propagatetherefore even in space it would be quite difficult to perceive noises, but the US space agency with an experiment still wanted to try to recover what could be the voice of the universe. From the black hole’s pressure waves and the ripples generated by them, astronomers had noticed that the hot gas enveloping the galaxy could be translated into audiosince it can be a medium through which sound waves can travel. Basically inaudible to humans, these waves produced by the black hole were then resynthesized as sound. NASA explained that the frequency of the notes has been raised 288 billion times. An operation for scientific research as important as it is extravagant (but not unprecedented), if we consider that, according to the Einstanian theory of relativity, black holes are celestial bodies with such an intense gravitational force that neither matter nor light , let alone the sounds can escape. Celestial bodies of which very little is known, due to the well-known difficulties of observation and study.

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May 8, 2022 (change May 8, 2022 | 10:05)



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