I need your help to figure it out if the following thought experiment makes sense. Imagine two points in space at the same distance from Earth, 100 light years. At one point a previously unknown supernova explodes; we observe it’s bright light in the sky for several months, and after that it fades away. From another point, a super-luminous object comes to us at a near-light speed, and it’s so bright that it’s visible to us through all its way to Earth for almost 100 years. Isn’t there a paradox that we can observe a flash of light only when it reaches us, but in case of the objects coming to us with near-light speed, we can observe them on all their way to us? … or can’t we? In other words, is there a principal difference between travel of light and travel of luminous objects?