A Black Star with a radius slightly greater than the predicted event horizon for an equivalent-mass black hole will appear very dark, because almost all light produced will be drawn back to the star, and any escaping light will be severely gravitationally redshifted. It will appear almost exactly like a Black Hole.A black star is a gravitational object composed of matter. It is a theoretical alternative to the black hole concept from general relativity. 
Saturn is referred to as Black Star in ancient Judaic beliefs. A dead star would be denoting the Black Sun Agenda, the Black Star Abaddon the Destroyer which has its connection to the Black Cube Matrix in the core of the planet Saturn.