If you look in the Travelers room with the spinning globe thing, there are these little pedestals that show the solar system. If you look closer you can see that all the planets are in perfect orbit... except Pluto haha. It kind of just zooms around wherever it wants. Thought this was good to share because the Medieval Classifications of planets included Greek gods - Hades being Pluto. Maybe what you speculated has something to do with why Pluto is moving around so randomly and how it relates to the darkness.