Simulations reveal surprising electron temperatures near M87 black hole's event horizon

The first black hole images stunned the world in 2019, with headlines announcing evidence of a glowing doughnut-shaped object from the center of galaxy Messier 87 (M87 --55 million light years from Earth. Supercomputer simulations are now helping scientists sharpen their understanding about the environment beyond a black hole's 'shadow,' material just outside its event horizon.