        “As far as I know.”  Twilight rubbed her face.  “I—you know, the Princess never told me.  That would change the perspective.”  She looked at the star charts.  “If we knew where it was—maybe I could make adjustments.”  She brightened.  “And, if I can match stars from its sky and our own, I bet I could figure out how far some of them are, using trigonometry.  I’m glad Luna’s letting me go though this book—I bet I can answer some questions nopony’s been able to before.”