During the week of the voyage to Jupiter she spent her time in the little ship park, walking through the trees. Zo preferred the dining hall, or the big viewing bubble where a small group gathered in the evening watch, to eat tabs of pandorph and play go, or smoke opium and look at the stars. So she seldom saw Ann on the trip out.

They shot over the asteroid belt, slightly out of the plane of the ecliptic, passing over several of the hollowed-out little worlds, no doubt, though it was hard to tell; inside the rock potatoes shown on the ship’s screens there might be rough shells like finished mines, or towns landscaped into beautiful estates; societies anarchic and dangerous, or settled by religious groups or utopian collectives, and painfully peaceable. The existence of such a wide variety of systems, coexisting in a semianarchic state, made Zo doubt that Jackie’s plans for organizing the outer satellites under a Martian umbrella would ever succeed; it seemed to her that the asteroid belt might serve as a model for what the entire solar system’s political organization would become. But Jackie did not agree; the asteroid belt was as it was, she said, because of its particular nature, scattered through a broad band all around the sun. The outer satellites on the other hand were clumped in groups around their gas giants, and were certain to become leagues because of that; and were such large worlds, compared to the asteroids, that eventually it would make a difference with whom they allied themselves in the inner system.