Galerie de photos de Titan, satellite de la planète Saturne

<h1>PIA08157: Crescent Moon with Rings</h1><div class="PIA08157" lang="en" style="width:547px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This poetic scene shows the giant, smog-enshrouded moon Titan behind Saturn's nearly edge-on rings. Much smaller Epimetheus (116 kilometers, or 72 miles across) is just visible to the left of Titan (5,150 kilometers, or 3,200 miles across).</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on March 9, 2006, at a distance of approximately 4.1 million kilometers (2.5 million miles) from Titan. The image scale is 25 kilometers (16 miles) per pixel on Titan. The brightness of Epimetheus was enhanced for visibility.</p><p>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.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA08157" onclick="window.open(this.href); return false;" title="Voir l'image PIA08157: Crescent Moon with Rings sur le site de la NASA">Voir l'image PIA08157: Crescent Moon with Rings sur le site de la NASA.</a></div>
PIA08157: Crescent Moon with Rings
<h1>PIA07753: Naming New Lands - September Flyby (annotated)</h1><div class="PIA07753" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Like an ancient mariner charting the coastline of an unexplored wilderness, Cassini's repeated encounters with Titan are turning a mysterious world into a more familiar place.</p><p>During a Titan flyby on Sept. 7, 2005, the spacecraft's narrow-angle camera acquired multiple images that were combined to create the mosaic presented here. Provisional names applied to Titan's features are shown; an unannotated version of the mosaic is also available (see <a href="/catalog/PIA07755">PIA07755</a>).</p><p>The image shows more than half of Titan's Saturn-facing hemisphere at moderate resolution, including the Fensal-Aztlan region, formerly "the H." This view is centered at 6.5 degrees north latitude, 20.6 degrees west longitude, and has a pixel scale of about 2 kilometers (1 mile) per pixel. It is an orthographic projection, rotated so that north on Titan is up.</p><p>This view is composed of 20 images obtained on Sept. 7, 2005, each processed to enhance surface detail. The central portion of this mosaic was previously released without labels (see <a href="/catalog/PIA07732">PIA07732</a>).</p><p>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.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA07753" onclick="window.open(this.href); return false;" title="Voir l'image PIA07753: Naming New Lands - September Flyby (annotated) sur le site de la NASA">Voir l'image PIA07753: Naming New Lands - September Flyby (annotated) sur le site de la NASA.</a></div>
PIA07753: Naming New Lands - September Flyby (annotated)
<h1>PIA08995: Above Adiri</h1><div class="PIA08995" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Within the windswept wastes of Titan's equatorial dune desert lies the 1,700-km (1,050-mi) wide bright region called Adiri, seen here at center. The intrepid Huygens probe landed off the northeastern edge of Adiri in January 2005.</p><p>This view looks toward the anti-Saturn side of Titan (5,150 kilometers, or 3,200 miles across) -- the side that always faces away from Saturn as the moon orbits. North on Titan is up and rotated 26 degrees to the right.</p><p>The image was taken using a spectral filter sensitive to wavelengths of infrared light centered at 939 nanometers. The view was acquired with the Cassini spacecraft wide-angle camera on June 14, 2007 at a distance of approximately 157,000 kilometers (98,000 miles) from Titan. Image scale is 9 kilometers (6 miles) per pixel.</p><p>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.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA08995" onclick="window.open(this.href); return false;" title="Voir l'image PIA08995: Above Adiri sur le site de la NASA">Voir l'image PIA08995: Above Adiri sur le site de la NASA.</a></div>
PIA08995: Above Adiri
<h1>PIA06203: Tracing Surface Features on Titan--Mosaic</h1><div class="PIA06203" lang="en" style="width:736px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This mosaic of Titan's south polar region was acquired during Cassini's first and distant encounter with the smog-enshrouded moon on July 2, 2004. The spacecraft approached Titan at a distance of about 340,000 kilometers (211,000 miles) during this flyby.</p><p>This is a contrast-enhanced version of a previously released image (see <a href="/catalog/PIA06109">PIA06109</a>), which allows surface details to be seen more easily. The very bright features near the south pole are clouds.</p><p>Due to Titan's thick, hazy atmosphere, the sizes of surface features that can be resolved are a few to five times larger than the actual pixel scale. At this distance, pixel scale is 2 kilometers (about 1 mile), so features larger than several kilometers across are resolved in the images. </p><p>A montage containing pairs of close-up images from this mosaic is also available (see <a href="/catalog/PIA06202">PIA06202</a>).</p><p>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 team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission, visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06203" onclick="window.open(this.href); return false;" title="Voir l'image PIA06203: Tracing Surface Features on Titan--Mosaic sur le site de la NASA">Voir l'image PIA06203: Tracing Surface Features on Titan--Mosaic sur le site de la NASA.</a></div>
PIA06203: Tracing Surface Features on Titan--Mosaic
<h1>PIA08943: Titan "T28" View</h1><div class="PIA08943" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Cassini acquired this view of Titan on April 13, 2007, following a flyby of the Mercury-sized moon. Titan's equatorial dark regions are visible in this view, along with faint, dark lineaments (linear features) in the otherwise bland-looking terrain of the north. Near the terminator are the dark, lake-like features identified in Cassini flybys early in 2007 (see <a href="/catalog/PIA08365">PIA08365</a>).</p><p>To the east of the lake-like features is a bright patch of clouds that likely consist of a mixture of methane and ethane.</p><p>This view of Titan (5,150 kilometers, or 3,200 miles across) is an orthographic reprojection centered on 27.4 degrees north latitude. An orthographic view is most like the view seen by a distant observer looking through a telescope.</p><p>The view was obtained using a filter sensitive to near-infrared light centered at 939 nanometers, allowing for observations of Titan's surface and lower atmosphere, added together. An image taken using a filter sensitive to visible light centered at 619 nanometers was then subtracted from the product, effectively removing the lower atmosphere contribution to the brightness values in the image, increasing image contrast and improving the visibility of surface features.</p><p>The Cassini spacecraft acquired this view with its narrow-angle camera at a distance of approximately 1.2 million kilometers (800,000 miles) from Titan. Image scale is 7 kilometers (5 miles) per pixel.</p><p>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.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA08943" onclick="window.open(this.href); return false;" title="Voir l'image PIA08943: Titan "T28" View sur le site de la NASA">Voir l'image PIA08943: Titan "T28" View sur le site de la NASA.</a></div>
PIA08943: Titan "T28" View
<h1>PIA07785: Comparing Notes on Titan -- Radar & Imaging Science Subsystem</h1><div class="PIA07785" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This short movie shows how data from two different instruments on the Cassini spacecraft can be combined to give an integrated view of Titan's surface.</p></p>The first frame -- a mosaic of near-infrared images from Cassini's Imaging Science Subsystem -- shows a 1,150-by 900-kilometer (715-by 560-mile) region near Titan's equator. North is up. At the bottom right is the edge of the large bright feature named Xanadu, which was first seen in NASA Hubble Space Telescope images in 1994. At the left is a smaller bright area named Shikoku Facula. The dark plains in between, called Shangri-La, are punctuated by numerous smaller bright features. This mosaic (<a href="/catalog/PIA07754">PIA07754</a>) was made from images acquired during Titan flyby in October 2005.</p><p>The second movie frame shows the full extent of a radar image acquired with the Synthetic Aperture Radar during a flyby of Titan on April 30, 2006. Some bright and dark areas of the radar image correlate to the visible-light camera view, such as the bright 90-kilometer (60-mile) diameter ring feature to the right of center named Guabonito, but others do not. The radar images reveal that many of the large dark areas appear to be covered in dark streaks, which are also seen elsewhere on Titan. The streaks seem to be dunes of some kind of granular material (see <a href="/catalog/PIA03567">PIA03567</a>).</p><p>Some particularly interesting areas include a dark spot at the northeastern end of Shikoku, which is not obvious in the Imaging Science Subsystem data. What appear to be channels across Shikoku are seen in the Imaging Science Subsystem data as very dark, and are perhaps filled with the same dark material that makes the dunes. Within Shangri-la, many of the small spots that look bright to the Imaging Science Subsystem are very prominent as bright spots in the radar image, suggesting they may be rugged hills poking up above the dark plains.</p><p>In the third frame, two segments of the radar image are highlighted, which have been more strongly enhanced (see <a href="/catalog/PIA08425">PIA08425</a> and <a href="/catalog/PIA08426">PIA08426</a> for these two images). Guabonito and Shikoku Facula are labeled.</p><p>There are artifacts present in the view once the radar image fades in -- these are due to the asymmetrical shape of the overlaid radar image.</p><p>Multiple sets of data are needed to understand a complex world like Titan. As the Cassini mission continues to fly by Titan and observe different regions of its surface, there will be more and more areas where comparative analyses can be done.</p><p>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 radar instrument was built by JPL and the Italian Space Agency, working with team members from the United States and several European countries. The imaging operations center is based at the Space Science Institute in Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA07785" onclick="window.open(this.href); return false;" title="Voir l'image PIA07785: Comparing Notes on Titan -- Radar & Imaging Science Subsystem sur le site de la NASA">Voir l'image PIA07785: Comparing Notes on Titan -- Radar & Imaging Science Subsystem sur le site de la NASA.</a></div>
PIA07785: Comparing Notes on Titan -- Radar & Imaging Science Subsystem
<h1>PIA07754: Naming New Lands - October Flyby</h1><div class="PIA07754" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Like an ancient mariner charting the coastline of an unexplored wilderness, Cassini's repeated encounters with Titan are turning a mysterious world into a more familiar place.</p><p>During a Titan flyby on Oct. 28, 2005, the spacecraft's narrow-angle camera acquired multiple images that were combined to create the mosaic presented here. A labeled version of the mosaic, showing provisional names applied to Titan's features, is also available (see <a href="/catalog/PIA07752">PIA07752</a>).</p><p>The mosaic is a high resolution close-up of two contrasting regions: dark Shangri-La and bright Xanadu. This view has a resolution of 1 kilometer (0.6 mile) per pixel and is centered at 2.5 degrees north latitude, 145 degrees west longitude, near the feature called Santorini Facula. The mosaic is composed of 10 images obtained on Oct. 28, 2005, each processed to enhance surface detail. It is an orthographic projection, rotated so that north on Titan is up.</p><p>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.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA07754" onclick="window.open(this.href); return false;" title="Voir l'image PIA07754: Naming New Lands - October Flyby sur le site de la NASA">Voir l'image PIA07754: Naming New Lands - October Flyby sur le site de la NASA.</a></div>
PIA07754: Naming New Lands - October Flyby
<h1>PIA08363: Giant Lake on Titan</h1><div class="PIA08363" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA08363_fig1.jpg"></a><br />Annotated Version</p><p>This view of Titan taken on Feb. 25, 2007, reveals a giant lake-like feature in Titan's North Polar Region. It is approximately 1,100 kilometers (680 miles) long and has a surface area slightly smaller than that of Earth's largest lake, the Caspian Sea.</p><p>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.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA08363" onclick="window.open(this.href); return false;" title="Voir l'image PIA08363: Giant Lake on Titan sur le site de la NASA">Voir l'image PIA08363: Giant Lake on Titan sur le site de la NASA.</a></div>
PIA08363: Giant Lake on Titan
<h1>PIA07728: Cassini's Sept. 7, 2005, Titan Flyby</h1><div class="PIA07728" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This map of Titan's surface illustrates the regions that will be imaged by Cassini during the spacecraft's close flyby of Titan on Sept. 7, 2005. At closest approach, the spacecraft is expected to pass approximately 1,075 kilometers (670 miles) above the moon's surface. This is Cassini's eighth flyby of Titan out of 45 flybys planned in the four-year tour. </p><p>The colored lines delineate the regions that will be imaged at differing resolutions.</p><p>Zooming-in closer to Titan than during its previous pass two weeks earlier, Cassini camera coverage again focuses on the region known informally as "the H." Some of the narrow-angle camera images Cassini takes during this close flyby will be composited into high-resolution mosaics, similar to <a href="/catalog/PIA06222">PIA06222</a>.</p><p>This encounter also should provide an excellent view of Bazaruto Facula and its central 80-kilometer-wide (50-mile) crater, seen in <a href="/catalog/PIA06234">PIA06234</a>.</p><p>The map shows only brightness variations on Titan's surface (the illumination is such that there are no shadows and no shading due to topographic variations). Previous observations indicate that due to Titan's thick, hazy atmosphere, the sizes of surface features that can be resolved are a few to five times larger than the actual pixel scale labeled on the map.</p><p>The images for this global map were obtained using a narrow band filter centered at 938 nanometers - a near-infrared wavelength (invisible to the human eye) at which light can penetrate Titan's atmosphere to reach the surface and return through the atmosphere to be detected by the camera. The images have been processed to enhance surface details.</p><p>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. </p><p>For more information about the Cassini-Huygens mission visit <a href="http://www.nasa.gov/cassini">http://www.nasa.gov/cassini</a> and <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA07728" onclick="window.open(this.href); return false;" title="Voir l'image PIA07728: Cassini's Sept. 7, 2005, Titan Flyby sur le site de la NASA">Voir l'image PIA07728: Cassini's Sept. 7, 2005, Titan Flyby sur le site de la NASA.</a></div>
PIA07728: Cassini's Sept. 7, 2005, Titan Flyby
Saturne_Titan_1.jpg
Saturne_Titan_1.jpg
<h1>PIA06079: Huygens Landing Site Revisited (Animation - Artist's Concept)</h1><div class="PIA06079" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/archive/PIA06079.mov"></a><b><br />Click on the image for the animation</b></p><p>This is an artist's interpretation of the area surrounding the Huygens landing site, based on images and data returned Jan. 14, 2005.</p><p>On this day, the European Space Agency's Huygens probe reached the upper layer of Titan's atmosphere and landed on the surface after a parachute descent of 2 hours and 28 minutes.</p><p>The Huygens probe was delivered to Saturn's moon Titan by the Cassini spacecraft, which is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif. NASA supplied two instruments on the probe: the descent imager/spectral radiometer and the gas chromatograph mass spectrometer. </p><p>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. </p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a>. </p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06079" onclick="window.open(this.href); return false;" title="Voir l'image PIA06079: Huygens Landing Site Revisited (Animation - Artist's Concept) sur le site de la NASA">Voir l'image PIA06079: Huygens Landing Site Revisited (Animation - Artist's Concept) sur le site de la NASA.</a></div>
PIA06079: Huygens Landing Site Revisited (Animation - Artist's Concept)
<h1>PIA06121: Seasonal Differences</h1><div class="PIA06121" lang="en" style="width:512px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Cassini's finely tuned vision reveals seasonal differences in the global haze that envelopes Titan in this narrow angle camera image taken on Oct. 24, 2004. The picture was taken through a filter sensitive to strong absorption by methane gas (wavelengths centered at 889 nanometers). Here, the northern hemisphere of Titan is notably brighter than the southern hemisphere, because there is more haze in the north. The presence of haze in the northern hemisphere was also observed in images returned by NASA's Voyager spacecraft in 1981. The haze distribution was reversed, north to south, in observations taken by NASA's Hubble Space Telescope from 1994 to 2000.</p><p>The image was taken from a distance of 1.08 million kilometers (675,000 miles) from Titan. The image scale is 6.52 kilometers (4.05 miles) per pixel.</p><p>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 Cassini-Huygens mission for NASA's Office of Space Science, Washington, D.C. The Cassini orbiter and its two onboard cameras, were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06121" onclick="window.open(this.href); return false;" title="Voir l'image PIA06121: Seasonal Differences sur le site de la NASA">Voir l'image PIA06121: Seasonal Differences sur le site de la NASA.</a></div>
PIA06121: Seasonal Differences
titan_pano-landing.jpg
titan_pano-landing.jpg
<h1>PIA03568: Diverse Geology</h1><div class="PIA03568" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The geologic diversity of Titan's surface is well illustrated by this synthetic aperture radar image, obtained on Oct. 28, 2005, during the Cassini spacecraft's ninth Titan fly-by and fourth radar pass. </p><p>The bottom left and top right parts of the image show a series of parallel features resembling those discovered during the second radar pass. Called "cat scratches," these may be dunes of water ice or hydrocarbon particles. The brighter area on the bottom right is thought to be rougher and possibly higher in elevation than the darker areas. Above the center of the image are dark, narrow winding channels carved by, and possibly still containing, liquids. </p><p>This image is about 300 kilometers (186 miles) by 250 kilometers (155 miles). It is located 10 degrees south latitude and 292 degrees west longitude.</p><p>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 team is based at JPL, working with team members from the United States and several European countries.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA03568" onclick="window.open(this.href); return false;" title="Voir l'image PIA03568: Diverse Geology sur le site de la NASA">Voir l'image PIA03568: Diverse Geology sur le site de la NASA.</a></div>
PIA03568: Diverse Geology
<h1>PIA06236: Titan: Complex 'Anti-greenhouse'</h1><div class="PIA06236" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This natural color image shows Titan's upper atmosphere -- an active place where methane molecules are being broken apart by solar ultraviolet light and the byproducts combine to form compounds like ethane and acetylene. The haze preferentially scatters blue and ultraviolet wavelengths of light, making its complex layered structure more easily visible at the shorter wavelengths used in this image.</p><p>A movie sequence of images, taken around the same time as this color view, shows movement of the haze layers over the course of a few hours (see <a href="/catalog/PIA06223">PIA06223</a>).</p><p>Lower down in the atmosphere, the haze turns into a globe-enshrouding smog of complex organic molecules. This thick, orange-colored haze absorbs visible sunlight, allowing only perhaps 10 percent of the light to reach the surface. The thick haze is also inefficient at holding in and then re-radiating infrared (thermal) energy back down to the surface. Thus, despite the fact that Titan has a thicker atmosphere than Earth, the thick global haze causes the greenhouse effect there to be somewhat weaker than it is on Earth.</p><p>Images taken with the Cassini spacecraft wide-angle camera using red, green and blue spectral filters were combined to create this natural color view. The images were obtained at a distance of approximately 9,500 kilometers (5,900 miles) from Titan on March 31, 2005. The image scale is approximately 400 meters (1,300 feet) per pixel. </p><p>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 team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a>. For additional images visit the Cassini imaging team homepage <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06236" onclick="window.open(this.href); return false;" title="Voir l'image PIA06236: Titan: Complex 'Anti-greenhouse' sur le site de la NASA">Voir l'image PIA06236: Titan: Complex 'Anti-greenhouse' sur le site de la NASA.</a></div>
PIA06236: Titan: Complex 'Anti-greenhouse'
<h1>PIA08737: Crater Studies on Titan</h1><div class="PIA08737" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This image from Cassini's radar instrument shows an impact crater with a diameter of 30 kilometers (19 miles) on the surface of Saturn's moon Titan.</p><p>Cassini data have only revealed three definite impact craters on Titan so far, so each new discovery adds significantly to our body of knowledge. Impact craters are particularly important, as their shapes give scientists insight into the structure of the crust beneath Titan's surface. The difference in overall appearance between this crater, which has a central peak, and those without, such as Sinlap, (see <a href="/catalog/PIA07368">PIA07368</a>), indicates variations in the conditions of impact, thickness of the crust, or properties of the meteorite that made the crater. The dark floor indicates smooth or highly absorbing materials.</p><p>This image was acquired by the Cassini radar instrument in synthetic aperture mode during a Sept. 7, 2006, flyby of Titan. The image is centered at 70 degrees west longitude, 10 degrees north latitude, and measures about 150 kilometers high by 190 kilometers wide (93 by 118 miles). The smallest details in this image are about 500 meters (about 550 yards) across.</p><p>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 radar instrument team is based at JPL, working with team members from the United States and several European countries. </p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA08737" onclick="window.open(this.href); return false;" title="Voir l'image PIA08737: Crater Studies on Titan sur le site de la NASA">Voir l'image PIA08737: Crater Studies on Titan sur le site de la NASA.</a></div>
PIA08737: Crater Studies on Titan
<h1>PIA08119: Views of Titan from Different Altitudes</h1><div class="PIA08119" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA08119_fig1.jpg"></a><br />Annotated Views of Titan from Different Altitudes</p><p>This poster shows a set of images acquired by the European Space Agency's Huygens probe descent imager/spectral radiometer, in the four cardinal directions (north, south, east, west), at five different altitudes above Titan's surface. The images were taken on Jan. 14, 2005.</p><p>The Huygens probe was delivered to Saturn's moon Titan by the Cassini spacecraft, which is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif. NASA supplied two instruments on the probe, the descent imager/spectral radiometer and the gas chromatograph mass spectrometer. </p><p>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 descent imager/spectral radiometer team is based at the University of Arizona, Tucson.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA08119" onclick="window.open(this.href); return false;" title="Voir l'image PIA08119: Views of Titan from Different Altitudes sur le site de la NASA">Voir l'image PIA08119: Views of Titan from Different Altitudes sur le site de la NASA.</a></div>
PIA08119: Views of Titan from Different Altitudes
<h1>PIA08427: Mercator Projection of Huygens's View at Different Altitudes</h1><div class="PIA08427" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA08427_fig1.jpg"></a><br />Annotated View of Mercator Projection of<br />Huygens's View at Different Altitudes</p><p>This poster shows a flattened (Mercator) projection of the view from the descent imager/spectral radiometer on the European Space Agency's Huygens probe at four different altitudes. The images were taken on Jan. 14, 2005.</p><p>The Huygens probe was delivered to Saturn's moon Titan by the Cassini spacecraft, which is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif. NASA supplied two instruments on the probe, the descent imager/spectral radiometer and the gas chromatograph mass spectrometer. </p><p>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 descent imager/spectral radiometer team is based at the University of Arizona, Tucson.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a></p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA08427" onclick="window.open(this.href); return false;" title="Voir l'image PIA08427: Mercator Projection of Huygens's View at Different Altitudes sur le site de la NASA">Voir l'image PIA08427: Mercator Projection of Huygens's View at Different Altitudes sur le site de la NASA.</a></div>
PIA08427: Mercator Projection of Huygens's View at Different Altitudes
<h1>PIA08351: Peeking at Saturn</h1><div class="PIA08351" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Cassini peers around the hazy limb of Titan to spy the sunlit south pole of Saturn in the distance beyond.</p><p>The thick, smog-like atmosphere of frigid Titan is a major source of interest for the Cassini mission. The moon is 5,150 kilometers (3,200 miles) across.</p><p>Images taken using red, green and blue spectral filters were combined to create this natural-color view. The image was taken with the Cassini spacecraft narrow-angle camera on Dec. 26, 2005, at a distance of approximately 26,000 kilometers (16,000 miles) from Titan. Image scale is 1 kilometer (4,643 feet) per pixel.</p><p>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.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA08351" onclick="window.open(this.href); return false;" title="Voir l'image PIA08351: Peeking at Saturn sur le site de la NASA">Voir l'image PIA08351: Peeking at Saturn sur le site de la NASA.</a></div>
PIA08351: Peeking at Saturn
<h1>PIA01942: Titan's Great Lakes?</h1><div class="PIA01942" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Using its radar system, the Cassini spacecraft has imaged new lakes on Titan. </p><p>The large dark patch seen on this image, at high latitudes surrounding Titan's north pole, is most likely a hydrocarbon lake. Several dark channels can be seen; the longest one at the left meanders over almost 100 kilometers (62 miles), and appears to drain into the lake. Some dark channels are remarkably straight, suggesting possible faulting in the subsurface. The bright landforms jutting into the lake indicate that old, eroded landforms may have flooded. For a different radar view from the same flyby see <a href="/catalog/PIA01943">PIA01943</a>.</p><p>This radar image was acquired by the Cassini radar instrument in synthetic aperture mode on Oct. 9, 2006. The image is centered near 73 degrees north latitude, 343 degrees west longitude, and measures about 300 kilometers by 140 kilometers (190 miles by 90 miles). Smallest details in this image are about 500 meters (1,640 feet) across. </p><p>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 radar instrument team is based at JPL, working with team members from the United States and several European countries. </p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. </p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA01942" onclick="window.open(this.href); return false;" title="Voir l'image PIA01942: Titan's Great Lakes? sur le site de la NASA">Voir l'image PIA01942: Titan's Great Lakes? sur le site de la NASA.</a></div>
PIA01942: Titan's Great Lakes?
<h1>PIA06998: Cassini Snaps Image of ESA's Huygens Probe</h1><div class="PIA06998" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA06998_fig1.jpg"></a><br>Figure 1</p><p>The Cassini spacecraft snapped this image of the European Space Agency's Huygens probe about 12 hours after its release from the orbiter. The probe successfully detached from Cassini on Dec. 24, 2004, and is on course for its January 14 encounter with Titan.</p><p>The Huygens probe will remain dormant until the onboard timer wakes it up just before the probe reaches Titan's upper atmosphere on Jan. 14, 2005. Then it will begin a dramatic plunge through Titan's murky atmosphere, tasting its chemical makeup and composition as it descends to touch down on its surface. The data gathered during this 2-1/2 hour descent will be transmitted from the probe to the Cassini orbiter. Afterward, Cassini will point its antenna to Earth and relay the data through NASA's Deep Space Network to JPL and on to the European Space Agency's Space Operations Center in Darmstadt, Germany, which serves as the operations center for the Huygens probe mission. From this control center, ESA engineers will be tracking the probe and scientists will be standing by to process the data from the probe's six instruments.</p><p>This image was taken with the Cassini spacecraft wide angle camera at a distance of 18 kilometers (11 miles) from the probe on Dec. 25, 2004. The image has been magnified and contrast enhanced to aid visibility.</p><p>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.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and <a href="http://www.nasa.gov/cassini/">http://www.nasa.gov/cassini</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06998" onclick="window.open(this.href); return false;" title="Voir l'image PIA06998: Cassini Snaps Image of ESA's Huygens Probe sur le site de la NASA">Voir l'image PIA06998: Cassini Snaps Image of ESA's Huygens Probe sur le site de la NASA.</a></div>
PIA06998: Cassini Snaps Image of ESA's Huygens Probe
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<h1>PIA06231: Jumbled Terrain</h1><div class="PIA06231" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>High-resolution images taken during Cassini's close encounter with Titan on April 16, 2005, provide still more examples of the complicated relationships between the dark and bright materials on Titan's surface.</p><p>During the two most recent flybys of Titan, on March 31 and April 16, Cassini captured a number of images of the hemisphere of Titan that faces Saturn. The image at the left is taken from a mosaic of images obtained in March (see <a href="/catalog/PIA06222">PIA06222</a>) and shows the location of the view at the right.</p><p>The image at the right, taken during the most recent Titan flyby, shows a complex pattern of small, 40-kilometer-wide (25-mile), dark features within a brighter area. Similar to <a href="/catalog/PIA06223">PIA06223</a>, several narrow, dark and curvilinear features can be seen that may hint of dark channels within the bright material. Cassini's synthetic aperture radar experiment also observed this region in February, and the visual infrared mapping spectrometer experiment observed along with the imaging science subsystem cameras in April. Comparisons of these data sets will be important in understanding the geologic history of this complex region.</p><p>The view at the left consists of five images that have been added together and enhanced to bring out surface detail and to reduce noise, although some camera artifacts remain. </p><p>These images were taken with the Cassini spacecraft narrow-angle camera using a filter sensitive to wavelengths of infrared light centered at 938 nanometers -- considered to be the imaging science subsystem's best spectral filter for observing the surface of Titan. This view was acquired from a distance of 36,000 kilometers (22,400 miles). The pixel scale of this image is 430 meters (0.3 miles) per pixel, although the actual resolution is likely to be several times larger.</p><p>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 team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a>. For additional images visit the Cassini imaging team homepage <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06231" onclick="window.open(this.href); return false;" title="Voir l'image PIA06231: Jumbled Terrain sur le site de la NASA">Voir l'image PIA06231: Jumbled Terrain sur le site de la NASA.</a></div>
PIA06231: Jumbled Terrain
<h1>PIA08971: In Shangri-la</h1><div class="PIA08971" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This view of Titan's surface highlights northwestern Shangri-la -- a large, equatorial dark region revealed by radar observations to be covered in longitudinal dune fields. The bright, circular feature right of center is a potential impact crater -- few of which have been spotted on Titan thus far.</p><p>North on Titan (5,150 kilometers, or 3,200 miles across) is up and rotated about 15 degrees to the right. </p><p>This view was created by combining multiple images taken using a combination of spectral filters sensitive to wavelengths of infrared light centered at 938 and 619 nanometers.</p><p>The images were taken with the Cassini spacecraft narrow-angle camera on May 13, 2007 at a distance of approximately 125,000 kilometers (77,000 miles) from Titan. Image scale is 1 kilometer (0.6 miles) per pixel. Due to scattering of light by Titan's hazy atmosphere, the sizes of surface features that can be resolved are a few times larger than the actual pixel scale.</p><p>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.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA08971" onclick="window.open(this.href); return false;" title="Voir l'image PIA08971: In Shangri-la sur le site de la NASA">Voir l'image PIA08971: In Shangri-la sur le site de la NASA.</a></div>
PIA08971: In Shangri-la
<h1>PIA08429: Impact Craters on Xanadu</h1><div class="PIA08429" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This image from the Synthetic Aperture Radar instrument on the Cassini spacecraft shows the radar-bright region Xanadu and two circular features interpreted to be degraded impact craters. In radar images, bright regions indicate a rough or scattering material, while a dark region might be smoother or more absorbing. The image was acquired during a flyby of Titan on April 30, 2006.</p><p>Near the top of the image is a 70-kilometer-wide (47-mile-wide) impact structure. In contrast to a similarly sized crater called Sinlap (see <a href="/catalog/PIA07368">PIA07368</a>), this crater shows a prominent central peak, indicating that the interaction between the impact and the crust was different in this region. </p><p>Near the bottom of the image is another circular feature with a dark central region that does not show evidence of a central peak. Numerous radar-bright channels cut across the image, indicating that liquids have flowed in this region.</p><p>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. </p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA08429" onclick="window.open(this.href); return false;" title="Voir l'image PIA08429: Impact Craters on Xanadu sur le site de la NASA">Voir l'image PIA08429: Impact Craters on Xanadu sur le site de la NASA.</a></div>
PIA08429: Impact Craters on Xanadu
<h1>PIA06154: Approaching Titan Again</h1><div class="PIA06154" lang="en" style="width:497px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Titan presented this face as the Cassini spacecraft approached for its second very close flyby of the mystery moon in December 2004. Prominent in the center of the image is Xanadu, a broad bright area on Titan first seen by NASA's Hubble Space Telescope in the mid-1990s. The region seen a few hours later during this Cassini encounter at higher resolution has just started to rotate into view on the left when this image was taken. Regions on the right (east) in this image had not been seen clearly before.</p><p>Other interesting features in this image, first seen by Cassini, include a bright 560-kilometer wide (345 mile) semi-circle in the lower right of Xanadu which may be an impact structure, and a confirmed crater with multiple concentric rings (near the upper right). The inner, dark circular feature in this crater is 300 +/- 20 kilometers (186 +/- 12 miles) in diameter.</p><p>Below Xanadu, two bright, linear clouds can be seen at about 38 degrees south latitude; these clouds were seen to dissipate a few hours later. Surprisingly, no clouds were seen near the south pole, as had been seen during the October close encounter (see <a href="/catalog/PIA06124">PIA06124</a>) and during the July distant encounter (see <a href="/catalog/PIA06110">PIA06110</a>).</p><p>This image was taken with the Cassini spacecraft narrow-angle camera on Dec. 10, 2004 at a distance of 1,746,000 kilometers (1,082,500 miles) and has a scale of 10.4 kilometers (6 miles) per pixel. A special filter in the near-infrared at 938 nanometers was used for this image. The image was processed to enhance surface features and sharpen boundaries. Some artifacts, like the false shadow around the bright streaked cloud, are a result of the processing.</p><p>[This caption was modified on March 16, 2005.] </p><p>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 team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission, visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06154" onclick="window.open(this.href); return false;" title="Voir l'image PIA06154: Approaching Titan Again sur le site de la NASA">Voir l'image PIA06154: Approaching Titan Again sur le site de la NASA.</a></div>
PIA06154: Approaching Titan Again
<h1>PIA06185: Titan Mosaic - Feb 2005</h1><div class="PIA06185" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This mosaic of Titan's surface was made from 16 images. The individual images have been specially processed to remove effects of Titan's hazy atmosphere and to improve visibility of the surface near the terminator (the boundary between day and night).</p><p>During Cassini's first close flyby of Titan in October 2004, many clouds were seen near the south pole; in the December flyby many clouds were seen at mid-latitudes (see <a href="/catalog/PIA06157">PIA06157</a>). During this flyby, only a few small clouds near the south pole were noted.</p><p>Imaging coverage during this flyby included improved looks at territory to the north and west of Xanadu, the large bright white area.</p><p>The images were taken with the Cassini spacecraft narrow angle camera through a filter sensitive to wavelengths of polarized infrared light and were acquired at distances ranging from approximately 226,000 to 242,000 kilometers (140,000 to 150,000 miles) from Titan. Resolution in the images is about 1.3 kilometers (0.8 miles) per pixel.</p><p>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 team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission, visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06185" onclick="window.open(this.href); return false;" title="Voir l'image PIA06185: Titan Mosaic - Feb 2005 sur le site de la NASA">Voir l'image PIA06185: Titan Mosaic - Feb 2005 sur le site de la NASA.</a></div>
PIA06185: Titan Mosaic - Feb 2005
<h1>PIA07871: Huygens Titan Mosaic #2</h1><div class="PIA07871" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This mosaic from the Descent Imager/Spectral Radiometer camera on the European Space Agency's Huygens probe combines 17 image triplets, projected from an altitude of 800 meters (2,625 feet). The area covered is approximately 1,300 meters (4,265 feet) across (north at the top of the image). The smallest visible objects visible are less than five meters (16 feet) across, and the dark channels are 30 to 40 meters (98 to 131 feet) wide.</p><p>The images were then stitched together using one of several projection algorithms (in this case 'gnomonic') to produce a full mosaic. The images used to construct this mosaic were taken on Jan. 14, 2005.</p><p>The Descent Imager/Spectral Radiometer is one of two NASA-funded instruments on the probe. </p><p>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 Cassini-Huygens mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter was designed, developed and assembled at JPL. The Descent Imager/Spectral team is based at the University of Arizona, Tucson, Ariz. </p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a>. For more information about the Descent Imager/Spectral Radiometer visit <a href="http://www.lpl.arizona.edu/~kholso/">http://www.lpl.arizona.edu/~kholso/</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA07871" onclick="window.open(this.href); return false;" title="Voir l'image PIA07871: Huygens Titan Mosaic #2 sur le site de la NASA">Voir l'image PIA07871: Huygens Titan Mosaic #2 sur le site de la NASA.</a></div>
PIA07871: Huygens Titan Mosaic #2
<h1>PIA09102: Liquid Lakes on Titan</h1><div class="PIA09102" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The existence of oceans or lakes of liquid methane on Saturn's moon Titan was predicted more than 20 years ago. But with a dense haze preventing a closer look it has not been possible to confirm their presence. Until the Cassini flyby of July 22, 2006, that is. </p><p>Radar imaging data from the flyby, published this week in the journal Nature, provide convincing evidence for large bodies of liquid. This image, used on the journal's cover, gives a taste of what Cassini saw. Intensity in this colorized image is proportional to how much radar brightness is returned, or more specifically, the logarithm of the radar backscatter cross-section. The colors are not a representation of what the human eye would see.</p><p>The lakes, darker than the surrounding terrain, are emphasized here by tinting regions of low backscatter in blue. Radar-brighter regions are shown in tan. The strip of radar imagery is foreshortened to simulate an oblique view of the highest latitude region, seen from a point to its west. </p><p>This radar image was acquired by the Cassini radar instrument in synthetic aperture mode on July 22, 2006. The image is centered near 80 degrees north, 35 degrees west and is about 140 kilometers (84 miles) across. Smallest details in this image are about 500 meters (1,640 feet) across.</p><p>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. </p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA09102" onclick="window.open(this.href); return false;" title="Voir l'image PIA09102: Liquid Lakes on Titan sur le site de la NASA">Voir l'image PIA09102: Liquid Lakes on Titan sur le site de la NASA.</a></div>
PIA09102: Liquid Lakes on Titan