May 10, 2022 13:00:00

NASA Releases 'Black Hole Sound' on Youtube

Most of the universe is a vacuum, and there is no medium for sound waves to pass through, so no sound can be heard in outer space. However, it is not that there is no sound, and in a cluster of galaxies that contains a large amount of gas, sound waves are transmitted through the gas that surrounds thousands of galaxies. Since the

observation of sound in the black hole of the Perseus galaxy in 2003, the black hole has been studied in relation to sound, but the 'black hole sound' that was originally far beyond the human audible range was NASA publishes audible audio data on Youtube.

Quick Look: Black Hole Sonification Remix-YouTube


Chandra :: Photo Album :: Sonification Collection :: May 4, 2022
https://chandra.si.edu/photo/2022/sonify5/

The movie released at NASA's Black Hole Week from May 2 to 6, 2022 is a supermassive black hole in the constellation Perseus taken by an artificial satellite equipped with an X-ray telescope called the Chandra X-ray Observatory (CXO) . Black hole data. The pressure wave transmitted from the center of the black hole causes ripples in the hot gas, which is converted into sound. This sound is 57 octaves lower than the central part of the human audible range, which is said to be about 10 octaves , and cannot be heard by the human ear. Therefore, the sound waves extracted from the CXO are scaled up 57 to 58 octaves above the actual pitch to create a resynthesized voice.

In the movie, it seems that the laser light makes a sound while going around from the center, but this visualizes that you are listening to sound waves radiated in various directions by the radar. You can see a low muffled growl-like sound as the radar moves.

In addition to the Perseus cluster of galaxies, the Virgo Cluster's 'M (Messiah) 87' whose observation images were released by the international project '

Event Horizon Telescope (EHT) ' to capture the appearance of black holes in April 2019. The audible voice has been released even in the black hole of '.

'Event Horizon Telescope' aiming to capture black hole shadows will hold a press conference --GIGAZINE

by EHT Collaboration

In the movie, the three layers with the purple line, blue line, and orange line drawn from the top are combined to make the sound. The purple on the top is the X-ray from the CXO, the blue in the middle is the light from NASA's Hubble Space Telescope, and the orange on the bottom is the observation data of the Atacama Large Millimeter Submillimeter Interferometer (radio wave) in Chile. Also, the brightest part on the left side of the image is the observed position of the black hole, from which the jet is generated in the upper right. It is said that the sound of the latter half of the movie is what is audible in different ranges by mapping the wavelengths of X-rays, light, and radio waves scanned from the center to the outside.

Sound waves transmitted from black holes are thought to be the mechanism by which gas floating between galaxies heats gas as it transports energy through plasma, and because its temperature helps regulate the formation of stars, 'sound waves It has an important role in the evolution of the galaxy. ' Converting the observed visual data into sound not only satisfies the curiosity of knowing the mystery of the universe, but is also expected to have scientific value.