File:Zwicky N crater AS17-P-1931.jpg

原始文件 (1,428 × 1,970像素,文件大小:617 KB,MIME类型:image/jpeg


摘要

描述
English: Apollo 17 photo of Zwicky N, an unusual crater that lies within the interior of the larger Zwicky crater. The description of the photography:
"A panoramic camera view of an unusual crater on the lunar far side, west of the large crater Aitken. The crater is polygonal in outline, its rim is not raised, and its walls are relatively smooth. The floor of the crater is occupied by a rather dark material with numerous cracks. This pattern has been informally referred to as a turtleback crater floor (El-Baz and Roosa, 1972). It occurs only in a few craters on the lunar surface and is probably caused by the cooling of a molten or partially molten fill within the crater. However, cracking due to tectonic movement (for example, the upward thrust of a central plug) cannot be excluded."—NASA SP-362, Page 221, Figure 236.
The crater Zwicky was apparently named at a date following the release of this photograph.
日期
来源 http://www.hq.nasa.gov/office/pao/History/SP-362/ch7.2.htm
primary source: Apollo 17 image AS17-P-1931
作者 NASA
本图像或视频收录于美国国家航空航天局 (NASA)某个部门,其照片编号是: AS17-P-1931

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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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Transferred from en.wikipedia to Commons using For the Common Good.

The original description page was here. All following user names refer to en.wikipedia.
日期/时间 大小 用户 备注
16:48, 7 October 2005 469 × 667 (79,389 bytes) w:en:RJHall (留言 | 贡献) (Reduced in size by 33%)
16:34, 7 October 2005 700 × 995 (106,171 bytes) w:en:RJHall (留言 | 贡献) (Zwicky N) (version lost by MediaWiki)

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