The True Scale of Phoenix A… And Why It Makes Galaxies Look Small

We’re now live on Spotify 🎧 https://open.spotify.com/show/10Hdv6g... Phoenix A isn't just a galaxy. It's home to one of the most massive black holes ever discovered - roughly 100 billion times the mass of our Sun - sitting at the center of one of the most extreme galaxy clusters in the observable universe. But what makes Phoenix A truly extraordinary isn't the black hole itself. It's what the black hole has built. Relativistic jets, powered by the energy of matter spiraling toward the event horizon, have carved out enormous cavities in the superheated gas surrounding the galaxy. These cavities stretch roughly 600,000 light-years across - six times the diameter of the entire Milky Way. A single black hole has produced a structure that makes galaxies look small. In this video, we explore what Phoenix A actually is, how a point source of energy can inflate something larger than a galaxy, what these cavities look like in real observational data, and why this process, AGN feedback, is one of the most important mechanisms governing how the universe evolves on the largest scales. Sources: McDonald, M. et al. (2012). "A massive, cooling-flow-induced starburst in the core of a luminous cluster of galaxies." Nature, 488, 349–352. McDonald, M. et al. (2019). "Anatomy of a Cooling Flow: The Feedback Response to Pure Cooling in the Core of the Phoenix Cluster." The Astrophysical Journal, 885, 63. Hlavacek-Larrondo, J. et al. (2022). "Evidence for a 100 billion solar mass black hole in the Phoenix Cluster." Monthly Notices of the Royal Astronomical Society. McNamara, B.R. & Nulsen, P.E.J. (2012). "Mechanical feedback from active galactic nuclei in galaxies, groups and clusters." New Journal of Physics, 14, 055023. Fabian, A.C. (2012). "Observational Evidence of Active Galactic Nuclei Feedback." Annual Review of Astronomy and Astrophysics, 50, 455–489. #PhoenixA #BlackHole #SpaceDocumentary #SpaceExploration #Astrophysics #CosmicScale #Universe