But the feature that makes Tethys really Death-Star-y is the huge honking crater on its surface. Dubbed Odysseus, the pock mark is one of the largest craters in the entire solar system. The rebound of whatever large object formed Odysseus produced some high mountains in the crater's center, and they just happen to correspond to that little nubbin in the center of the Death Star's, um, laser-y bit. Anyway, it's uncanny! Alderaan better watch out.