File:Jingpo Lacus in radar & visible light.jpg
Jingpo_Lacus_in_radar_&_visible_light.jpg (480 × 360 像素,檔案大小:113 KB,MIME 類型:image/jpeg)
摘要
描述Jingpo Lacus in radar & visible light.jpg |
English: Cassini peers through the murky orange haze of Titan to spy what are believed to be bodies of liquid hydrocarbons, two of them as large as seas on Earth, near the moon's north pole. The image combines a near natural-color view and an infrared glimpse of Titan's surface obtained by the visual cameras with a transition to imagery collected by the radar instrument aboard Cassini, for a dramatic reveal of the north pole of Saturn's largest moon.
The most readily visible bodies are outlined in blue. The largest of these, on the bottom, is as big as the Caspian Sea on Earth; the next largest, on the right, is about the size of Lake Superior. When compared to the surface area of Titan however (which is six times smaller than Earth's), these bodies are equivalent in size to the Bay of Bengal and Timor Sea, respectively. Geographically speaking, they are more like seas. It is clear that one of the radar swaths has intersected a small upper bay of the largest sea, and has almost entirely imaged the second one. The extreme darkness of these regions in the radar data argues strongly for the presence of liquid hydrocarbons, such as methane and ethane, which remain liquid at Titan's frigid temperature of minus 180 degrees Celsius (minus 288 degrees Fahrenheit). See PIA09182. The images were taken with the Cassini spacecraft narrow-angle camera on Feb. 25, 2007, at a distance of approximately 1.3 million kilometers (800,000 miles) from Titan. The infrared images were taken with a special filter centered at 938 nanometers that provides the cameras' best view of Titan's surface features. This view was then composited with images taken at 619, 568 and 440 nanometers to create a near natural color appearance. The radar data were acquired in synthetic aperture radar mode. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo. For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov/home/index.cfm. The Cassini imaging team homepage is at http://ciclops.org. The original NASA image has been cropped to center Jingpo Lacus. |
日期 | |
來源 | http://photojournal.jpl.nasa.gov/catalog/PIA08365 |
作者 | NASA / JPL / Space Science Institute |
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25 2 2007
資料大小 Chinese (Hong Kong) (已轉換拼寫)
115,997 位元組
360 像素
480 像素
多媒體型式 繁體中文 (已轉換拼寫)
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目前 | 2012年3月17日 (六) 04:24 | 480 × 360(113 KB) | WolfmanSF |
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方位 | 標準 |
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水平解析度 | 72 dpi |
垂直解析度 | 72 dpi |
使用軟體 | Adobe Photoshop Elements 9.0 Windows |
檔案修改日期時間 | 2012年3月16日 (五) 20:54 |
色彩空間 | 顏色未校準 |
影像寬度 | 480 px |
影像高度 | 360 px |
數位化的日期時間 | 2012年3月16日 (五) 20:05 |
詮釋資料最後修改日期 | 2012年3月16日 (五) 13:54 |
原始文件唯一識別碼 | xmp.did:00CDA538E06FE11194A5D39093DE0A74 |