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File:PIA08425 Radar Images the Margin of Xanadu.jpg

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English: This image of Saturn's moon Titan from the Synthetic Aperture Radar instrument on the Cassini spacecraft shows the southwestern area of a feature called Xanadu (bottom right of the image). The area is bright because it reflects the radio wavelengths used to make this radar images. The image was taken on April 30, 2006.

Xanadu is one of the most prominent features on Titan and was first seen in ground-based observations. The origin of Xanadu is still unknown, but this radar image reveals details previously unseen, such as numerous curvy features that may indicate fluid flows. Linear dark streaks visible in radar-dark areas are dune fields, also seen in previous radar images (see PIA03567). Near the center of the image is a prominent circular feature, named Guabonito, about 90 kilometers (56 miles) in diameter. It might be an impact crater or a cryovolcanic caldera. If this is an impact structure, the absence of an ejecta blanket suggests that the feature has been highly eroded, like some impact structures on Earth, or has been buried by the dune fields. Other radar-bright areas (top left and top right) appear to be topographically high and might act as obstacles, diverting the dunes around them.

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 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.
日期
来源 http://photojournal.jpl.nasa.gov/jpeg/PIA08425.jpg
作者 NASA/JPL-Caltech/ASI

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Public domain 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/zhNASA版权方针页面JPL图片使用方针。)
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当前2015年12月19日 (六) 01:372015年12月19日 (六) 01:37版本的缩略图2,070 × 1,244(558 KB)PlanetUserlarger res
2010年4月19日 (一) 15:502010年4月19日 (一) 15:50版本的缩略图1,289 × 775(242 KB)Xabier Cancela{{Information |Description={{en|1=This radar image of Titan shows Guabonito crater.}} |Source=http://photojournal.jpl.nasa.gov/jpegMod/PIA08425_modest.jpg |Author=Nasa/JPL |Date= |Permission={{PD-USGov-NASA}} |other_versions= }} Category:Titan (moon)

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