File:PIA17655 crop Titan north polar seas and lakes.jpg
原始文件 (3,000 × 3,000像素,文件大小:7.41 MB,MIME类型:image/jpeg)
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[编辑]描述PIA17655 crop Titan north polar seas and lakes.jpg |
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 | |
来源 | 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) |
许可协议
[编辑]Public domainPublic domainfalsefalse |
本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zh、NASA版权方针页面或JPL图片使用方针。) | ||
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注解 InfoField | 该图片含有注解:在维基媒体共享资源上查看注解 |
Jingpo Lacus
Punga Mare
Ligeia Mare
Bolsena Lacus
Mayda Insula
Neagh Lacus
Sparrow Lacus
Kivu Lacus
Mackay Lacus
Ladoga Lacus
Feia Lacus
Abaya Lacus
Vänern Lacus
Kraken Mare
Sotonera Lacus
Koitere Lacus
Waikare Lacus
Mývatn Lacus
Sevan Lacus
Logtak Lacus
Ohrid Lacus
Uvs Lacus
Atitlán Lacus
Cayuga Lacus
Oneida Lacus
Mayda Insula
Vid Flumina
Sparrow Lacus
Uvs Lacus
Atitlán Lacus
Cayuga Lacus
Sevan Lacus
Logtak Lacus
Vänern Lacus
Ohrid Lacus
Koitere Lacus
Waikare Lacus
Mývatn Lacus
Oneida Lacus
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方向 | 正常 |
---|---|
水平分辨率 | 72 dpi |
垂直分辨率 | 72 dpi |
使用软件 | Adobe Photoshop Elements 9.0 Windows |
文件修改日期时间 | 2014年2月7日 (五) 22:44 |
Exif版本 | 2.21 |
色彩空间 | sRGB |
图像宽度 | 3,000 px |
图像高度 | 3,000 px |
数字化日期时间 | 2014年2月7日 (五) 22:28 |
元数据最后修改日期 | 2014年2月7日 (五) 14:44 |
著作权状况 | 著作权状况未设置 |
原始文件唯一ID | xmp.did:BE7D187E8C90E3118471B158A4402012 |
IIM版本 | 27,061 |