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About the Cover


Four Hubble Space Telescope (HST) images of Jupiter showing (left to right) the plume visible 5 minutes after the impact of fragment G of comet Shoemaker-Levy 9 on 18 July 1994 and the development of the impact site after 1.5 hours, 3 days, and 5 days. The impact sites of fragments L and S appear in the third and fourth images. See Articles beginning on page 1277. [images: R. Evans, J. Trauger, H. Hammel, and the HST Comet Science Team and NASA]


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