@thoitrangnu148: Scientists simulated how light behaves as it passes through the warped space around a black hole. A photon can have its orbit bent a little (what they call n=0), or by 180° (n=1), or bent into an actual circle, an orbit around the black hole (n=2 and higher). Each of these then get shot toward us, building up to make a series of rings of light around the black hole. Too close in and the photons get swallowed up by the black hole, creating the dark void in the center, whimsically if not hugely accurately called the black hole's shadow. #astrophysics #universe #space #earth #foryou #gravity #distances #science #physics #astronomy #khonggian #vutru #khonggian #knowledge #thienvan #xuhuong #kienthuc #vatly