File:Ganymede terrain.jpg

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Terrain on Ganymede.


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/zhNASA版权方针页面JPL图片使用方针。)
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English: Boundary between dark and light terrain on Ganymede. The photo is PIA02577 at the JPL Planetary Photojournal. It was taken by the Galileo spacecraft.

Original NASA caption:

The ancient, dark terrain of Nicholson Regio (left) shows many large impact craters, and zones of fractures oriented generally parallel to the boundary between the dark and bright regions of Jupiter's moon Ganymede. In contrast, the bright terrain of Harpagia Sulcus (right) is less cratered and relatively smooth.

The nature of the boundary between ancient, dark terrain and younger, bright terrain, the two principal terrain types on Ganymede, was explored by NASA's Galileo spacecraft on May 20, 2000. Subtle parallel ridges and grooves show that Harpagia Sulcus's land has been smoothed out over the years by tectonic processes.

North is to the top of the picture. The Sun illuminates the surface from the left. The image, centered at ?14 degrees latitude and 319 degrees longitude, covers an area approximately 213 by 97 kilometers (132 by 60 miles.) The resolution is 121 meters (about 250 feet) per picture element. The images were taken on May 20, 2000, at a range of 11,800 kilometers (about 7,300 miles).
来源 http://photojournal.jpl.nasa.gov/catalog/PIA02577
作者 NASA/JPL/DLR

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当前2005年6月4日 (六) 20:582005年6月4日 (六) 20:58版本的缩略图1,764 × 809(729 KB)Dbenbenn1764x809 version, converted from TIF with quality 95%
2005年4月1日 (五) 01:352005年4月1日 (五) 01:35版本的缩略图1,476 × 677(255 KB)Smartech~commonswiki{{PD-USGov-NASA}} A picture of terrain on Ganymede, the satellite of Jupiter. From the english article about Ganymede.

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