APOD on Nostr: **Astronomy Picture of the Day** 19 October 2026 **Treble Clef: Unusual X-ray Hot ...
**Astronomy Picture of the Day**
19 October 2026
**Treble Clef: Unusual X-ray Hot Radio Source**
Video thumbnail: _Link down bellow_
Credit: NASA, CXC, INAF-IRA, A. Botteon, et al., UKIDSS, GPS, ASTRON, LOFAR, SAO, N. Wolk
Explanation: Explanation: Explanation : What is Treble Clef? This unusual radio structure extends over 2 million light-years and resembles a common musical symbol -- but has its visible light hidden by our own Milky Way Galaxy . Examined in 2004, the nature of VLSS J0318.9+5755, dubbed Treble Clef , remained unknown. Recent observations by the Chandra X-ray Observatory and eROSITA , however, have led to the hypothesis that the Treble Clef central cloud of charged particles was originally expelled by a supermassive black hole at the center of a galaxy. After the radio emission from those particles faded, they may have been reinvigorated by a shock wave from the collision of two clusters of galaxies . The featured composite image shows radio emission in red, while recently discovered X-rays are shown in blue. Unusual objects like Treble Clef give humanity unexpected clues about how whole clusters of galaxies interact as well as the general evolution of our universe . Tomorrow's picture: backwards rainbow
#APOD #TrebleClef #XRay #RadioSource #GalaxyClusters #SupermassiveBlackHole
https://science.nasa.gov/image-article/apod-2026-october-19-treble-clef-unusual-x-ray-hot-radio-source/Published at
2026-10-19 04:06:32 UTCEvent JSON
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"content": "**Astronomy Picture of the Day**\n\n19 October 2026\n\n**Treble Clef: Unusual X-ray Hot Radio Source**\n\nVideo thumbnail: _Link down bellow_\nhttps://assets.science.nasa.gov/dynamicimage/assets/science/cds/apod/apod/2026/october/trebleclef.jpg\n\nCredit: NASA, CXC, INAF-IRA, A. Botteon, et al., UKIDSS, GPS, ASTRON, LOFAR, SAO, N. Wolk\n\nExplanation: Explanation: Explanation : What is Treble Clef? This unusual radio structure extends over 2 million light-years and resembles a common musical symbol -- but has its visible light hidden by our own Milky Way Galaxy . Examined in 2004, the nature of VLSS J0318.9+5755, dubbed Treble Clef , remained unknown. Recent observations by the Chandra X-ray Observatory and eROSITA , however, have led to the hypothesis that the Treble Clef central cloud of charged particles was originally expelled by a supermassive black hole at the center of a galaxy. After the radio emission from those particles faded, they may have been reinvigorated by a shock wave from the collision of two clusters of galaxies . The featured composite image shows radio emission in red, while recently discovered X-rays are shown in blue. Unusual objects like Treble Clef give humanity unexpected clues about how whole clusters of galaxies interact as well as the general evolution of our universe . Tomorrow's picture: backwards rainbow\n\n#APOD #TrebleClef #XRay #RadioSource #GalaxyClusters #SupermassiveBlackHole\n\nhttps://science.nasa.gov/image-article/apod-2026-october-19-treble-clef-unusual-x-ray-hot-radio-source/\n",
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