There is a rumor that the Sun is about to become a supernova, so we blast off for the star Sirius. Just as the journey is half-way over, we see explosions from both the Sun Sirius at the same instant! Are we correct to conclude that in our (the spaceship's) reference frame, the two explosions were simultaneous? (Hint: use a picture to explain why or why not)

There is a rumor that the Sun is about to become a supernova, so we blast off for the star Sirius. Just as the journey is half-way over, we see explosions from both the Sun Sirius at the same instant! Are we correct to conclude that in our (the spaceship's) reference frame, the two explosions were simultaneous? (Hint: use a picture to explain why or why not)