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Chandra Finds Possible Origin of ‘Treble Clef’ Waves

A formation of radio waves looks remarkably like a treble clef in this Oct. 14, 2026, image from NASA’s Chandra X-Ray Observatory. Researchers used Chandra to find that the Treble Clef is likely caused by an outburst from a supermassive…

By · October 15, 2026 · 1 min read
This article was originally published by NASA Breaking News and is republished here under license.
A composite image of a remarkable radio wave formation that strongly resembles a treble clef musical symbol, hovering in the midst of two colliding galaxy clusters. Here, galaxies in the galaxy clusters, plus foreground and background stars and galaxies, blanket the image with specks of light set against the blackness of space. At the center of the frame is a large, oval, blue-purple cloud with ragged edges. In the middle of the purple field, tilting slightly to our left, is what appears to be a giant treble clef, loosely drawn with a neon pink marker. Like the musical notation for which it's named, the formation has a strong vertical stroke with a continuous, fluid line swooping back and forth as it moves from top to bottom.
X-ray: NASA/CXC/INAF-IRA/A. Botteon et al.; Infrared: UKIDSS-GPS ; Radio: ASTRON/LOFAR; Image processing: NASA/CXC/SAO/N. Wolk

A formation of radio waves looks remarkably like a treble clef in this Oct. 14, 2026, image from NASA’s Chandra X-Ray Observatory. Researchers used Chandra to find that the Treble Clef is likely caused by an outburst from a supermassive black hole, followed by a collision of two galaxy clusters.

Read more about this discovery.

Image credit: X-ray: NASA/CXC/INAF-IRA/A. Botteon et al.; Infrared: UKIDSS-GPS ; Radio: ASTRON/LOFAR; Image processing: NASA/CXC/SAO/N. Wolk

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