跳至內容

File:PIA17655 crop Titan north polar seas and lakes.jpg

頁面內容不支援其他語言。
這個檔案來自維基共享資源
維基百科,自由的百科全書

原始檔案 (3,000 × 3,000 像素,檔案大小:7.41 MB,MIME 類型:image/jpeg


摘要

描述
English: This colorized mosaic from NASA's Cassini mission shows the most complete view yet of Titan's northern land of lakes and seas. Saturn's moon Titan is the only world in our solar system other than Earth that has stable liquid on its surface. The liquid in Titan's lakes and seas is mostly methane and ethane.

The data were obtained by Cassini's radar instrument from 2004 to 2013. In this projection, the north pole is at the center. The view extends down to 50 degrees north latitude. In this color scheme, liquids appear blue and black depending on the way the radar bounced off the surface. Land areas appear yellow to white. A haze was added to simulate the Titan atmosphere.

Kraken Mare, Titan's largest sea, is the body in black and blue that sprawls from just below and to the right of the north pole down to the bottom right. Ligeia Mare, Titan's second largest sea, is a nearly heart-shaped body to the left and above the north pole. Punga Mare is just below the north pole.

The area above and to the left of the north pole is dotted with smaller lakes. Lakes in this area are about 30 miles (50 kilometers) across or less.

Most of the bodies of liquid on Titan occur in the northern hemisphere. In fact nearly all the lakes and seas on Titan fall into a box covering about 600 by 1,100 miles (900 by 1,800 kilometers). Only 3 percent of the liquid at Titan falls outside of this area.

Scientists are trying to identify the geologic processes that are creating large depressions capable of holding major seas in this limited area. A prime suspect is regional extension of the crust, which on Earth leads to the formation of faults creating alternating basins and roughly parallel mountain ranges. This process has shaped the Basin and Range province of the western United States, and during the period of cooler climate 13,000 years ago much of the present state of Nevada was flooded with Lake Lahontan, which (though smaller) bears a strong resemblance to the region of closely packed seas on Titan.

A related flyover can be seen at PIA17656.

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, DC. The Cassini orbiter was designed, developed and assembled at JPL. The radar instrument was built by JPL and the Italian Space Agency, working with team members from the United States and several European countries.

For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov and http://www.nasa.gov/cassini.

The original NASA image has been modified by rotating 90 deg. clockwise and cropping.

Some of the features in this image have been annotated in Wikimedia Commons.
日期
來源 http://photojournal.jpl.nasa.gov/catalog/PIA17655
作者 NASA / JPL-Caltech / Agenzia Spaziale Italiana / USGS
其他版本

Titan's North.jpg - Lower resolution, uncropped version (2860 × 2740 pixels, 6.07 MB)
PIA10008 Seas and Lakes on Titan.jpg - slightly higher resolution version, with less coverage (2348 × 1900 pixels, 2.62 MB)

PIA10008 Seas and Lakes on Titan full size.jpg - highest resolution version, with less coverage (4696 × 4696 pixels, 10.4 MB)

授權條款

Public domain 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/zhNASA版權政策JPL圖像使用政策
警告:
註解
InfoField
該圖片含有註解:在維基媒體共享資源上查看註解

說明

添加單行說明來描述出檔案所代表的內容

在此檔案描寫的項目

描繪內容

著作權狀態 繁體中文 (已轉換拼寫)

斷定方法:​美國聯邦政府的作品 繁體中文 (已轉換拼寫)

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⁠圖尺寸用戶備⁠註
目前2014年2月8日 (六) 07:21於 2014年2月8日 (六) 07:21 版本的縮圖3,000 × 3,000(7.41 MB)WolfmanSFHigher resolution version
2013年12月13日 (五) 06:24於 2013年12月13日 (五) 06:24 版本的縮圖1,700 × 1,700(3.68 MB)WolfmanSFUser created page with UploadWizard

全域檔案使用狀況

以下其他 wiki 使用了這個檔案:

詮釋資料