[she'd find that cute if it weren't for the context]

And the sun. To oversimplify it, a star is a mass of burning plasma, far larger than your typical life-bearing planet. It's the primary source of light and warmth for nearby planets, and when it dies, it generally means wiping out the life on those worlds.

Problem is, that isn't what was happening. It wasn't until we were already destroying the target that I found out they were building a worldship to carry their noncombatants. Their older ones were dying and couldn't get their passengers to habitable worlds.