Communication is slow in space. Years after the event, the fast-fading light of the explosion reached the ship. Communication stopped.
Some of them had become blasé about this possibility. Are you still an earthling, even if your grandparents never set foot on the planet? But now they felt lost.
The voting in the steering committee was unanimously. Slowly, ever so slowly, the behemoth turned around. A new commitment filled the halls and valleys of the arc ship. Investigation, and, if possible, revenge, that was their hope now.
Almost thirty years later, Lucy, then a toddler, now captain-at-large, announced their mistake.