NASA APOD Features 'Treble Clef' X-ray Radio Source

NASA's Astronomy Picture of the Day for October 19, 2026, showcases 'Treble Clef,' an X-ray hot radio source spanning over 2 million light-years. Observations from the Chandra X-ray Observatory and eROSITA suggest its central particle cloud was ejected by a supermassive black hole and re-energized by a galaxy cluster collision. This highlights complex astrophysical phenomena and ongoing space observation efforts.