Star Power IV: Boldly Bolding Where No Man Has Bolded Before!

[Nerd-o-rama]

That part I got.
But they aren't looking for a lost civilization, they are looking for the star-powered who helped charging them.
Someone like Danica or Mitch.
If he's anything like Danica, he can be just a common worker from the park they just left, who enjoyed looking at the stars in his free time.
And if he's anything like Mitch, my first guess would have been the star of the system regardless of what civilization lived there.

I think they had a nonsensical but feasible a priori bias ("Anything amazing in a Zel Gux system must be related to the Zel Gux ruins somehow") that happened to be correct. It doesn't make logical sense, but you can see how sapient beings would arrive at it, unlike older instances of Mookie Logic.