File:Mars Ice Age PIA04933 modest.jpg
原始文件 (2,880 × 2,880像素,文件大小:701 KB,MIME类型:image/jpeg)
说明
描述Mars Ice Age PIA04933 modest.jpg |
English: An illustration of what Mars might have looked like during an ice age between 2.1 million and 400,000 years ago, when Mars's axial tilt is believed to have been much larger than today. This illustration was prepared for the cover of the December 18 2003 issue of the journal Nature.
Ελληνικά: Αναπαράσταση του πώς μπορεί να έμοιαζε ο πλανήτης Άρης πρiν από 2,1 εκατομμύρια έως 400.000 χρόνια, όταν η κλίση του άξονα περιστροφής του σε σχέση με την εκλειπτική πιστεύεται πως ήταν πολύ μεγαλύτερη, προκαλώντας μια Εποχή των παγετώνων στον πλανήτη. Η εικόνα εμφανίστηκε στο εξώφυλλο της 18ης Δεκ. του 2003 του περιοδικού Nature.
Original captionThis simulated view shows Mars as it might have appeared during the height of a possible ice age in geologically recent time. Of all Solar System planets, Mars has the climate most like that of Earth. Both are sensitive to small changes in orbit and tilt. During a period about 2.1 million to 400,000 years ago, increased tilt of Mars' rotational axis caused increased solar heating at the poles. A new study using observations from NASA's Mars Global Surveyor and Mars Odyssey orbiters concludes that this polar warming caused mobilization of water vapor and dust into the atmosphere, and buildup of a surface deposit of ice and dust down to about 30 degrees latitude in both hemispheres. That is the equivalent of the southern Unites States or Saudi Arabia on Earth. Mars has been in an interglacial period characterized by less axial tilt for about the last 300,000 years. The ice-rich surface deposit has been degrading in the latitude zone of 30 degrees to 60 degrees as water-ice returns to the poles. In this illustration prepared for the December 18, 2003, cover of the journal Nature, the simulated surface deposit is superposed on a topography map based on altitude measurements by Global Surveyor and images from NASA's Viking orbiters of the 1970s. Mars Global Surveyor and Mars Odyssey are managed by NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology, Pasadena, for the NASA Office of Space Science, Washington. |
||||||
日期 | |||||||
来源 | http://photojournal.jpl.nasa.gov/catalog/PIA04933 file | ||||||
作者 | NASA/JPL/Brown University | ||||||
授权 (二次使用本文件) |
|
此标签不表示文件的著作权状态。任何文件在附有此标签的同時还需要一个有效的著作权标签。请参阅许可协议说明页面以了解更多信息。 其他语言:
العربية ∙ беларуская (тарашкевіца) ∙ български ∙ català ∙ čeština ∙ dansk ∙ Deutsch ∙ English ∙ español ∙ فارسی ∙ français ∙ galego ∙ magyar ∙ հայերեն ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ македонски ∙ മലയാളം ∙ Nederlands ∙ polski ∙ português ∙ русский ∙ sicilianu ∙ slovenščina ∙ Türkçe ∙ українська ∙ 简体中文 ∙ 繁體中文 ∙ +/− |
原始上传日志
[编辑]- 2004-07-06 03:31 Curps 577×577× (41292 bytes) Credit: NASA/JPL/Brown University
文件历史
点击某个日期/时间查看对应时刻的文件。
日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
---|---|---|---|---|---|
当前 | 2011年10月2日 (日) 10:25 | 2,880 × 2,880(701 KB) | Badseed(留言 | 贡献) | full resolution | |
2009年5月28日 (四) 22:21 | 577 × 577(40 KB) | File Upload Bot (Magnus Manske)(留言 | 贡献) | {{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|Credit: NASA/JPL/Brown University [http://www.jpl.nasa.gov/images/policy/index.cfm] An illustration of |
您不可以覆盖此文件。
文件用途
没有页面使用本文件。
全域文件用途
以下其他wiki使用此文件:
- ar.wikipedia.org上的用途
- ca.wikipedia.org上的用途
- en.wikipedia.org上的用途
- es.wikipedia.org上的用途
- fa.wikipedia.org上的用途
- hr.wikipedia.org上的用途
- it.wikipedia.org上的用途
- ja.wikipedia.org上的用途
- pnb.wikipedia.org上的用途
- pt.wikipedia.org上的用途
- ro.wikipedia.org上的用途
- ru.wikipedia.org上的用途
- sr.wikipedia.org上的用途
- uk.wikipedia.org上的用途
- ur.wikipedia.org上的用途
- zh.wikipedia.org上的用途
元数据
此文件含有额外信息,这些信息可能是创建或数字化该文件时使用的数码相机或扫描仪所添加的。如果文件已从其原始状态修改,某些详细信息可能无法完全反映修改后的文件。
_error | 0 |
---|