When Rooke thinks about the stars, he begins to think about science in a new way: it's no longer a way for him to rationalize violence. Rather, because the laws of science are universal and the stars don't change, the different ways that different cultures think about them shows that everyone's roots are essentially the same. Rooke also comes to the final, definitive conclusion that he's partly guilty for every violent thing that's happened in New South Wales, simply by being part of the machine that promotes that violence.