A Universe of Sound
NASA

Bullet Cluster Sonification

This image of the Bullet Cluster (officially known as 1E 0657-56) provided the first direct proof of dark matter, the mysterious unseen substance that makes up the vast majority of matter in the Universe. X-rays from Chandra (pink) show where the hot gas in two merging galaxy clusters has been wrenched away from dark matter, seen through a process known as “gravitational lensing” in data from Hubble (blue) and ground-based telescopes. In converting this into sound, the data pan left to right, and each layer of data was limited to a specific frequency range. Data showing dark matter are represented by the lowest frequencies, while X-rays are assigned to the highest frequencies. The galaxies in the image revealed by Hubble data, many of which are in the cluster, are in mid-range frequencies. Then, within each layer, the pitch is set to increase from the bottom of the image to the top so that objects towards the top produce higher tones.

Bullet Cluster Composite Bullet Cluster Optical Bullet Cluster X-ray Bullet Cluster Dark Matter

Composite
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Optical
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X-Ray
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Dark Matter
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The Chandra sonifications were led by the Chandra X-ray Center (CXC), with input from NASA's Universe of Learning. The sustained collaboration was driven by visualization scientist Dr. Kimberly Arcand (CXC), astrophysicist Dr. Matt Russo and musician Andrew Santaguida (both of the SYSTEM Sounds project). For other sonifications, please see their linked pages.


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Chandra X-ray Center, Operated for NASA by the Smithsonian Astrophysical Observatory. This site was developed with funding from NASA under contract NAS8-03060   |   Privacy  |  Accessibility
Additional support from NASA's Universe of Learning (UoL). UoL materials are based upon work supported by NASA under award number NNX16AC65A to the Space
Telescope Science Institute, working in partnership with Caltech/IPAC, Jet Propulsion Laboratory, and Smithsonian Astrophysical Observatory.