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

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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.
Date
Source http://www.hq.nasa.gov/office/pao/History/SP-362/ch7.2.htm
primary source: Apollo 17 image AS17-P-1931
Author NASA
This image or video was catalogued by one of the centers of the United States National Aeronautics and Space Administration (NASA) under Photo ID: AS17-P-1931.

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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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.
Date/Time Dimensions User Comment
16:48, 7 October 2005 469 × 667 (79,389 bytes) w:en:RJHall (talk | contribs) (Reduced in size by 33%)
16:34, 7 October 2005 700 × 995 (106,171 bytes) w:en:RJHall (talk | contribs) (Zwicky N) (version lost by MediaWiki)

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Date/TimeThumbnailDimensionsUserComment
current16:14, 14 December 2018Thumbnail for version as of 16:14, 14 December 20181,428 × 1,970 (617 KB)Jstuby (talk | contribs)higher resolution from ASU
21:08, 24 August 2012Thumbnail for version as of 21:08, 24 August 2012469 × 667 (78 KB)Bulwersator (talk | contribs)Transferred from en.wikipedia: see original upload log above

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