Bild:PIA00519 Interior of Ganymede.jpg - Alemannische Wikipedia

# Bild:PIA00519 Interior of Ganymede.jpg

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- Interior of Ganymede

- original description: Voyager images are used to create a global view of Ganymede. The cut-out reveals the interior structure of this icy moon. This structure consists of four layers based on measurements of Ganymede's gravity field and theoretical analyses using Ganymede's known mass, size and density. Ganymede's surface is rich in water ice and Voyager and Galileo images show features which are evidence of geological and tectonic disruption of the surface in the past. As with the Earth, these geological features reflect forces and processes deep within Ganymede's interior. Based on geochemical and geophysical models, scientists expected Ganymede's interior to either consist of: a) an undifferentiated mixture of rock and ice or b) a differentiated structure with a large lunar sized "core" of rock and possibly iron overlain by a deep layer of warm soft ice capped by a thin cold rigid ice crust. Galileo's measurement of Ganymede's gravity field during its first and second encounters with the huge moon have basically confirmed the differentiated model and allowed scientists to estimate the size of these layers more accurately. In addition the data strongly suggest that a dense metallic core exists at the center of the rock core. This metallic core suggests a greater degree of heating at sometime in Ganymede's past than had been proposed before and may be the source of Ganymede's magnetic field discovered by Galileo's space physics experiments.

- source: http://photojournal.jpl.nasa.gov/catalog/PIA00519

This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy).

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Warnings:

- Use of NASA logos, insignia and emblems are restricted per US law 14 CFR 1221.
- The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not in the public domain.
- Materials from the Hubble Space Telescope may be copyrighted if they do not explicitly come from the STScI. [1]
- All materials created by the SOHO probe are copyrighted and require permission for commercial non-educational use. [2]
- Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3]

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| Version vom | Benutzer | Maße | Dateigröße | Kommentar
aktuell | 05:42, 27. Jun. 2005 | Bricktop | 2.667×2.000 | 610 KB |

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- Ganymed (Mond)

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