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from | Encarta |  |
North Pole of Mars |
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| Viking orbiters took more than 50,000 photos of Mars, mapping almost the entire surface of the planet. The north pole of Mars is covered by a cap of water ice all year and by a layer of solid carbon dioxide during the Martian winter. | ||||||
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| NASA/Photo Researchers, Inc. | ||||||
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| Appears in these articles: | ||||||
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| Mars (planet); Mars Climate Orbiter; Viking (spacecraft) | ||||||
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