File:Callisto Arcas PIA00876.jpg

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English: This image of the south polar region of the Jovian satellite Callisto was taken in twilight by the Galileo spacecraft on its eighth orbit around Jupiter. Craters ranging in size from 60 kilometers (36 miles) down to the limit of resolution are visible in this image. Scientists count the number of craters on a planetary surface to estimate its relative (and sometimes absolute) age. Note that many of the craters are not as sharp in appearance as the two large craters near the bottom of the image. This is an indication that some process has eroded the craters since their formation.
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http://photojournal.jpl.nasa.gov/catalog/PIA00876

作者 NASA/JPL/University of Arizona
本图像或视频收录于美国国家航空航天局 (NASA)喷气推进实验室(Jet Propulsion Laboratory),其照片编号是: PIA00876

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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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The original description page was here. All following user names refer to en.wikipedia.
  • 2007-04-23 08:00 Ruslik0 800×800×8 (49172 bytes) Callisto Arcas crater neat south pole, from NASA Planetary Photojournal [http://photojournal.jpl.nasa.gov/catalog/PIA00876] {{PD-USGov-NASA}}

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当前2008年5月14日 (三) 20:202008年5月14日 (三) 20:20版本的缩略图800 × 800(48 KB)TheDJ留言 | 贡献{{Information |Description={{en|This image of the south polar region of the Jovian satellite Callisto was taken in twilight by the Galileo spacecraft on its eighth orbit around Jupiter. Craters ranging in size from 60 kilometers (36 miles) down to the lim

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