File:Voyager 1 View of Callisto - GPN-2003-000004.jpg
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DescriptionVoyager 1 View of Callisto - GPN-2003-000004.jpg |
English: Voyager 1 took this picture of Callisto during Voyager'sapproach to Jupiter's outer large satellite in 1979. BothGalileo and Marius discovered Callisto in 1610. In Greek mythology, Callisto was a nymph loved by Zeus and thus hated byHera. Hera turned her into a bear, which Zeus placed in theheavens as the constellation Ursa Major. Voyager was 350,000 kilometers from Callisto and took this picture that showsfeatures about seven kilometers wide across the surface. Callisto is a little smaller than Ganymede (Callisto isabout the size of Mercury) and it seems that it is composed of a mixture of ice and rock (about 40 percent ice and 60percent rock and iron). The darker color of Callisto (about half as reflective as Ganymede but still twice as bright as theMoon) implies that the upper surface is "dirty ice" or water-rich rock frozen on Callisto's cold surface (approximately -243Fahrenheit degrees at the equator). Callisto's atmosphere ismostly carbon dioxide. Far more craters appear on the surfaceof Callisto than on the surface of Ganymede, leading scientiststo believe that Callisto is the oldest of the Galileansatellites. Callisto could date back as far as four billionyears ago and has remained relatively unchanged in the historyof space. |
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Source | Great Images in NASA Description | ||||||
Author | NASA | ||||||
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This image or video was catalogued by Jet Propulsion Laboratory of the United States National Aeronautics and Space Administration (NASA) under Photo ID: GPN-2003-000004 and Alternate ID: PIA-02253. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing. Other languages:
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current | 23:56, 9 April 2009 | 3,333 × 3,333 (1.35 MB) | BotMultichillT (talk | contribs) | {{Information |Description={{en|1=Voyager 1 took this picture of Callisto during Voyager'sapproach to Jupiter's outer large satellite in 1979. BothGalileo and Marius discovered Callisto in 1610. In Greek mythology, Callisto was a nymph loved by Zeus and t |
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