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About the Cover


Image composite of the planet Uranus (center) and five of its moons, as viewed by the Voyager 2 spacecraft. Moons (clockwise from top) are Titania, Miranda, Ariel, Umbriel, and Oberon. See page 1322. [National Aeronautics and Space Administration/Jet Propulsion Laboratory]


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Science. ISSN 0036-8075 (print), 1095-9203 (online)