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Huge black hole on fire, emits gamma rays billions times stronger than visible light
Now, this same black hole is once again captivating scientists with an extraordinary gamma-ray flare that’s emitted photons hundreds of billions of times more powerful than visible light.
Space.com1mon
Black holes snacking on small stars create particle accelerators that bombard Earth with cosmic rays
"We would like to understand the difference between these systems, which holds the clue to understand just how many cosmic rays are produced in the jets of microquasars." ...