The city was concentrated at first on the hemisphere facing Saturn, which looms overhead four times larger than Luna from Earth. This was felt worth having in one’s sky, especially since Iapetus’s orbit is at a seventeen-degree tilt from the plane of Saturn’s rings, giving it a perpetually changing view of the gorgeous mobile. Almost all the other moons see the rings only edge-on. From the Iapetus bulge one also has a view down to the rest of the moon’s surface, twelve or sixteen kilometers lower than the bulge, so there is always a broad icescape below to balance the sublime ringed pearl
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