the first time you see a quasar from earth (its just a white dot, like the stars) it's actually gone because the light from it is still travelling around to us, and the expansion of space just adds more time to that. and actually, a quasar is the most brightest thing in the universe! its a black hole eating a star that is orbiting around it, just very very very slowly chipping away the star, and it becomes a belt around the black hole which is interesting and bright!