NASA is illuminating the universe in red, white, and blue to commemorate the 250th anniversary of the United States, accompanied by a unique auditory experience.
The visuals include the supernova remnant Cassiopeia A, the nebula NGC 3603, the spiral galaxy Messier 94, and the galaxy cluster ZwCl 0024+1652. Data from the Hubble Space Telescope, the James Webb Space Telescope, the Chandra X-ray Observatory, and ground-based telescopes are presented in a patriotic palette.
This cosmic display is not only visual but also auditory, as optical data from three images have been paired with sounds of various instruments through a process known as sonification.
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Cassiopeia A, the sole silent image in the new July 4 collection, is a supernova remnant located 11,000 light-years from Earth. It is described as a cosmic firecracker, a star that has exploded with a blast wave still visible in X-ray emissions. In this image, the explosion appears in blue thanks to Chandra’s observations. The James Webb Space Telescope’s infrared data highlights the expanding stellar material in red and white.
In contrast, the nebula NGC 3603 resembles a chrysanthemum firework in vivid red. Situated 20,000 light-years from Earth, this star-forming region has been sonified by NASA scientists who assigned different image elements to specific sounds. Neutron stars and black holes produce piano notes, while Hubble’s optical imagery translates to the gentle strum of an acoustic guitar. The background hum is derived from X-ray emissions detected by Chandra.
NGC 3603 shows a colossal and brilliant star factory located in the Carina spiral arm of our Milky Way galaxy.
X-ray: NASA/CXC/SAO; IR/UV: NASA/ESA/CSA/STScI/AURA; Image Processing: NASA/CXC/SAO/L. Frattare and K. Arcand
For Messier 94, a spiral galaxy also known as NGC 4736, Chandra’s X-ray data is transformed into a whistling wind, while neutron stars and stellar-mass black holes emit crystalline tones from a glass marimba. Piano notes represent stars and distant galaxies. Located 16 million light-years from Earth, this bright galaxy can be observed with a good commercial telescope, though not in the depicted red, white, and blue colors.
This image shows the galaxy NGC 4736, also known as Messier 94 or M94.
X-ray: NASA/CXC/SAO; Optical:Brian Brennan and Remi Lacasse; Image Processing: NASA/CXC/SAO/L. Frattare and K. Arcand
In comparison, the galaxy cluster ZwCl 0024+1652 is located 5 billion light-years from our solar system. This cluster is notable for its unique dark-matter structure, formed from the collision of two galaxy clusters. While dark matter usually aligns with visible matter like gas and stars, the dark-matter ring at ZwCl 0024+1652 is distinct. Displayed in brilliant blue from Hubble data, a synthesized sci-fi sound underscores the unique nature of ZwCl 0024+1652, with musical peaks at the dark-matter ring and the cluster’s core of superheated gas. Piano notes signify background galaxies, while background stars sound like a glockenspiel.
This image features ZwCl 0024+1652, an immense and distant cluster of galaxies bound together by gravity.
X-ray: NASA/CXC/SAO; Optical and Dark Matter: NASA/ESA/M.J. Jee; Image Processing: NASA/CXC/SAO/L. Frattare
NASA’s sonification program, initiated in 2020, converts astronomical data into audible frequencies. This effort aims to engage blind and low-vision individuals, while also offering a novel way for sighted individuals to experience the universe. A tool is available for anyone to transform space visuals into sound, crafting their own cosmic melody.
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