We Finally Know How Black Holes Produce The Most Brilliant Light in The Universe

https://www.sciencealert.com/we-finally-know-how-black-holes-produce-the-most-brilliant-light-in-the-universe/amp

For something that emits no light that we can detect, black holes just love to cloak themselves in radiance.

Some of the brightest light in the Universe comes from supermassive black holes, in fact. Well, not actually the black holes themselves; it's the material around them as they actively slurp down vast amounts of matter from their immediate surroundings.

Among the brightest of these maelstroms of swirling hot material are galaxies known as blazars. Not only do they glow with the heat of a swirling coat, but they also channel material into 'blazing' beams that zoom through the cosmos, shedding electromagnetic radiation at energies that are hard to fathom.

Scientists have finally figured out the mechanism producing the incredible high-energy light that reaches us from billions of years ago: Shocks in the black hole's jets that boost the speed of particles to mind-blowing velocities.

Much more at link.