Seeing is not the same as existing at the same time, concurrently.
You can see the star, up close and immediate, with maybe a few minutes of delay, or from far away with millions of years of delay.............
If you were in a speeding spaceship at the speed of light you might perceive that only a minute has passed since your last observation. Back on earth your friends (were they exceptionally long-lived, by their clock) perceive that millions of years have passed. Both views exist, both are valid. So are time travelers' perceptions.
same time, concurrently
You can't use those terms in the relativistic universe. Both are dependent on perspective.