Source for the ring of fire image at the bottom of the page: http://eventhorizontelescope.org/simulations-gallery http://eventhorizontelescope.org/simulations-g

Source for the ring of fire image at the bottom of the page: http://eventhorizontelescope.org/simulations-gallery http://eventhorizontelescope.org/simulations-gallery under "> Accretion Disk"