Imagine if this happened in the movies
They discover this isolated ancient cave which has been sealed shut for like 10,000 years and inside they find evidence of a long lost Na'vi tribe who made paintings in it. The paintings show Eywa inside Pandora but it also shows Polymphus and all the other moons in the system with their own Eywa inside them. Plus all the celestial bodies are very accurate as if drawn from space.
What the hell happened?!