I’d like to add that the only means we have to observe our universe are completely beholden to the light speed rule. Radio waves and light have a maximum speed that they travel. Since technically we cannot travel faster than the methods of our observation, then when we observe an event becomes the moment it happens relative to our location. If we were closer to the event it would happen sooner but if the person closer to the event tried to tell the person farther away, the information cannot travel faster then light/radio/gravity waves anyway so both sets of information would arrive to the farther person at the same time. In essence marking the event at that time in every respect. Since we don’t exist in other solar systems and we certainly don’t exist in systems 650 light years away the point is moot. In essence, when the waves of information reach you, in whatever capacity, is when the event occurs. We can say is happened 650 years ago but but since time travel is as ridiculous as faster than light travel or even approaching speed of light, it doesn’t matter anyway