Picture three stars forming a perfect triangle in space. One is our own sun. Let's say the three stars are all at the same distance from each other--100 light years. Now from our point of view the two stars are both 100 light years away. So to us they'd be existing at the same time to each other-- both exactly 100 years ago. BUT..from the perspective of either of those two stars, the other star would NOT be existing at the same time but 100 years in the past. So which is it? Are the stars existing at the same time? Or at different times? Or both?