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AltTextAccessibility: Chandra Release - August 26, 2024 Visual Description: Cas A, 30 Doradus, NGC 6872 Sonifications Different telescopes detect different types of light. Much of what they capture is recorded as digital data. Those data can then be translated into visuals, or even sounds. In today's release, the data from three different astronomical obse rvations are presented in collections of visualizations, and sonifications. Just as each composite visualization includes data from different sources, each comp osite sonification represents multiple data sets from different telescopes. The collections presented here include sonifications of data from different light sp ectra, and composites with all related sonifications layered into a single video . The first collection features observations of Cassiopeia A, the remains of an ex ploded star located about 11,000 light-years from Earth. The composite visualiza tion of the remaining debris field resembles a churning ball of dark blue and re d clouds, marbled and veined with purples, greens, reds, electric blues, yellows , whites, and oranges. In each of the related sonification videos, a small circl e at the center of each image expands outward. As the growing circle sweeps past different elements, a variety of sounds are triggered. The brighter the light f rom each element, the louder and higher pitched the sound. In the James Webb Spa ce Telescope visualization of Cassiopeia A, the debris field features marbled cl ouds of red, yellow, orange, green, and white. In the JWST sonification, musical instruments have been assigned to each color. Low pitched strings represent red , and high strings represent white. Low brass instruments represent yellow and o range, high brass represents blue, and woodwinds represent green. In the Chandra X-ray visualization, the brightness of the electric blue X-ray cloud is mapped to notes on a modified piano. And in the Hubble optical visualization, small cym bals called crotales chime when the expanding circle sweeps over a distant star. All of these instruments are combined in a symphonic sonification of the compos ite visuals. The second collection features observations of 30 Doradus, one of the largest an d brightest regions of star formation close to the Milky Way. In the composite v isualization, a field of stars is partially obscured by a red nebula of cosmic g as and dust, and bright blue X-ray clouds. Near the center of the visualization, a break in the nebula, ringed with wispy white clouds, reveals a brilliant glea ming star, and the central star cluster of 30 Doradus. In the related sonificati on videos, a vertical line sweeps across the images from left to right, triggeri ng musical sounds as different elements are encountered. The higher in the frame the element is, the higher the pitch of the sound. In the Chandra sonification, the mottled cloud of bright blue X-ray light is mapped to notes on an airy synt hesizer. In the James Webb Space Telescope infrared sonification, the red nebula is mapped to soft low musical pitches, and the wispy white cloud is mapped to h arsh, high frequency, wind-like sounds. Stars are played on a piano-like synthes izer, with percussion triangles indicating diffraction spikes. A rain-stick repr esents stars belonging to the central cluster. All of these instruments are comb ined in the composite sonification. The third collection features observations of NGC 6872, a large spiral galaxy wi th elongated arms stretching toward our upper right and lower left. NGC 6872 is backed by a field of stars and distant galaxies, with a neighboring spiral galax y beside it, to our left. The two galaxies, as well as several bright stars, are engulfed in a neon purple cloud of X-ray gas. In the related sonification video s, a radial arm sweeps clockwise around the images, starting at twelve o'clock, triggering musical sounds as different elements are encountered. The volume of t he music is mapped to brightness, and the pitch is related to the distance from the center; the farther away, the higher the pitch. In the Hubble sonification, a low drone represents the core of NGC 6872, while higher, brighter sounds repre sent the extended spiral arms. Low plucked sounds represent background galaxies, and cymbals represent foreground stars. In the Chandra sonification, wind-like sounds represent the neon purple X-ray cloud, and more compact background object s are presented as chirping birds!
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Credit: X-ray: NASA/CXC/Penn State Univ./L. Townsley et al.; IR: NASA/ESA/CSA/STScI/JWST ERO Production Team
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