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File:PIA01130 Interior of Europa.jpg

原始文件 ‎（2,666 × 2,000像素，文件大小：528 KB，MIME类型：image/jpeg）

描述
English: *Interior of Europa
  • original description: Cutaway view of the possible internal structure of Europa The surface of the satellite is a mosaic of images obtained in 1979 by NASA's Voyager spacecraft. The interior characteristics are inferred from gravity field and magnetic field measurements by NASA's Galileo spacecraft. Europa's radius is 1565 km, not too much smaller than our Moon's radius. Europa has a metallic (iron, nickel) core (shown in gray) drawn to the correct relative size. The core is surrounded by a rock shell (shown in brown). The rock layer of Europa (drawn to correct relative scale) is in turn surrounded by a shell of water in ice or liquid form (shown in blue and white and drawn to the correct relative scale). The surface layer of Europa is shown as white to indicate that it may differ from the underlying layers. Galileo images of Europa suggest that a liquid water ocean might now underlie a surface ice layer several to ten kilometers thick. However, this evidence is also consistent with the existence of a liquid water ocean in the past. It is not certain if there is a liquid water ocean on Europa at present.
日期
来源 http://photojournal.jpl.nasa.gov/catalog/PIA01130
作者 unknown author of the NASA
其他版本
檔案提取流程本檔案有一個提取出的圖像：​PIA01130 Interior of Europa (cropped).jpg。
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  • brighter surface
    brighter surface


Public domain 本文件完全由NASA创作，在美国属于公有领域。根据NASA的版权方针，NASA的材料除非另有声明否则不受版权保护。（参见Template:PD-USGov/zh、NASA版权方针页面或JPL图片使用方针。）
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File:PIA01130 Interior of Europa.jpg
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