File:Perspective view of Hellespontus Montes (14595692166).jpg
原始文件 （1,920 × 1,080像素，文件大小：1.85 MB，MIME类型：image/jpeg）
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摘要
| 描述 |
Perspective view of Hellespontus Montes, a rocky ridge on the western rim of the vast Hellas basin in the southern hemisphere of Mars. The foreground shows a close-up of a crater with a particularly interesting feature: wrinkles that form a roughly concentric pattern, with ever-smaller arcs towards the structure’s centre. This type of feature is known as ‘concentric crater fill’, and is thought to be associated with snowfall and freezing cycles in an earlier and wetter period of martian history. Once inside the crater, the snow was trapped and soon covered by surface dust, before compacting to form ice. The number of concentric lines indicate many cycles of this process and it is possible that ice may be hidden beneath just tens of metres of surface debris in these craters. The image was taken by the High Resolution Stereo Camera on ESA’s Mars Express on 13 January 2014 (orbit 12 750). The centre of the associated main colour image is located at approximately 41°S/45°E. Credit: ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO Copyright Notice: This work is licenced under the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as 'ESA/DLR/FU Berlin’, a direct link to the licence text is provided and that it is clearly indicated if changes were made to the original content. Adaptation/translation/derivatives must be distributed under the same licence terms as this publication. To view a copy of this license, please visit creativecommons.org/licenses/by-sa/3.0/igo/ |
| 日期 | |
| 来源 | Perspective view of Hellespontus Montes |
| 作者 | European Space Agency |
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这幅图片原始出处为Flickr的https://www.flickr.com/photos/37472264@N04/14595692166 ，作者为europeanspaceagency 。经机器人FlickreviewR在2014年12月18日审查后确定为采用cc-by-sa-2.0的协议授权使用。 |
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| 日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
|---|---|---|---|---|---|
| 当前 | 2014年12月18日 (四) 14:27 | | 1,920 × 1,080（1.85 MB） | Coyau | Transferred from Flickr via Flickr2Commons |
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