The best theory I’ve come up with so far, after brushing up on von Daniken’s “Chariots of the Gods,†is that it’s the Hex Nut of the Giants, affixed to the end of a massive bolt that’s holding the planet together. I haven’t worked out yet how a race of titanic engineers managed to insert the bolt at Saturn’s south pole. Nor have I identified the location of their hardware store, but we need to start looking for it right away, because NASA’s video shows that it’s swirling counterclockwise dangerously near what looks to me like the end of the bolt. If this thing keeps unscrewing . . . .
I think it’s the walls of an alien base.