File:PIA22896-Mars-SpiderlikeTerrain-20181211.jpg
![File:PIA22896-Mars-SpiderlikeTerrain-20181211.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/6/62/PIA22896-Mars-SpiderlikeTerrain-20181211.jpg/800px-PIA22896-Mars-SpiderlikeTerrain-20181211.jpg?20181211213716)
原始檔案 (2,880 × 1,800 像素,檔案大小:1.14 MB,MIME 類型:image/jpeg)
說明
說明
摘要
[編輯]描述PIA22896-Mars-SpiderlikeTerrain-20181211.jpg |
English: PIA22896: The Enduring Charm of Martian Spiders
https://photojournal.jpl.nasa.gov/catalog/PIA22896 Araneiform terrain (colloquially: spider-like terrain) is located in the south polar region of Mars and evolves in appearance over the spring and summer. In the season shown here, the thin bright lines on the surface (the spider legs) are troughs and many of these features have dark fan-shaped markings emanating from them. Our current theory for how these patterns are formed is that during winter a carbon dioxide ice layer develops over the surface. When sun rays strike this surface, this carbon dioxide ice acts in a similar way to our atmosphere: it allows the sun light to penetrate but traps the infrared radiation creating a greenhouse-like effect. The trapped heat transforms the ice at the bottom of the layer to gas, building up pressure until it bursts through. When that happens, the gas flows out in geyser-like fashion and carries dust with it, which falls back to the surface to form the dark fans. The map is projected here at a scale of 25 centimeters (9.8 inches) per pixel. [The original image scale is 24.6 centimeters (9.7 inches) per pixel (with 1 x 1 binning); objects on the order of 74 centimeters (29.1 inches) across are resolved.] North is up. The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington. |
日期 | |
來源 | https://photojournal.jpl.nasa.gov/jpeg/PIA22896.jpg |
作者 | NASA/JPL-Caltech/University of Arizona |
授權條款
[編輯]Public domainPublic domainfalsefalse |
![]() |
本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zh,NASA版權政策或JPL圖像使用政策) | ![]() |
![]() |
警告:
|
檔案歷史
點選日期/時間以檢視該時間的檔案版本。
日期/時間 | 縮圖 | 尺寸 | 使用者 | 備註 | |
---|---|---|---|---|---|
目前 | 2018年12月11日 (二) 21:37 | ![]() | 2,880 × 1,800(1.14 MB) | Drbogdan(留言 | 貢獻) | User created page with UploadWizard |
無法覆蓋此檔案。
檔案用途
全域檔案使用狀況
以下其他 wiki 使用了這個檔案:
- en.wikipedia.org 的使用狀況
- zh.wikipedia.org 的使用狀況