Galerie de photos de Rhéa, satellite de la planète Saturne

<h1>PIA10405: Crater Comparison</h1><div class="PIA10405" lang="en" style="width:633px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This view of Saturn's moon Rhea includes two large and ancient impact basins and a more recent, bright ray crater. </p><p>The large basin above center is named Tirawa. This feature (and the similar-sized crater to its left) is overprinted by many other craters, meaning it is an extremely old feature that has collected other impacts over the eons.</p><p>For a high-resolution view of the bright ray crater, see <a href="/catalog/PIA07764">PIA07764</a>. </p><p>This bright ray crater appears to be a younger feature, as it possesses crisp edges, is not heavily overprinted by other craters, and the blanket of bright, fresh material thrown out by the impact is still visible.</p><p>Lit terrain seen here is on the moon's anti-Saturn side. North on Rhea (1,528 kilometers, or 949 miles across) is toward the top of the image. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 13, 2008. The view was obtained at a distance of approximately 889,000 kilometers (552,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 31 degrees. Image scale is 5 kilometers (3 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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA10405" onclick="window.open(this.href); return false;" title="Voir l'image PIA10405: Crater Comparison sur le site de la NASA">Voir l'image PIA10405: Crater Comparison sur le site de la NASA.</a></div>
PIA10405: Crater Comparison
<h1>PIA10429: Icy Desolation</h1><div class="PIA10429" lang="en" style="width:762px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The Cassini spacecraft surveys the stark beauty of Saturn's moon Rhea.</p><p>Rhea's north pole is up and tilted slightly away from Cassini in this view; the moon's south pole is in sunlight at bottom. Lit terrain seen here is on the anti-Saturn side of Rhea (1,528 kilometers, or 949 miles across). </p><p>The image was taken in visible red light with the Cassini spacecraft narrow-angle camera on June 10, 2008. The view was acquired at a distance of approximately 420,000 kilometers (261,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 53 degrees. Image scale is 3 kilometers (2 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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA10429" onclick="window.open(this.href); return false;" title="Voir l'image PIA10429: Icy Desolation sur le site de la NASA">Voir l'image PIA10429: Icy Desolation sur le site de la NASA.</a></div>
PIA10429: Icy Desolation
<h1>PIA10451: Rhea Before the Eclipse</h1><div class="PIA10451" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The Cassini spacecraft acquired this detailed view of Rhea just before the moon slipped into an eclipse by Saturn's shadow.</p><p>During the eclipse, the wide-angle camera acquired support observations for Cassini's Composite Infrared Spectrometer (CIRS) instrument. Such images help confirm CIRS' pointing on the sky as that instrument observed Rhea's infrared radiation in the absence of solar illumination.</p><p>This view looks toward the Saturn-facing side of Rhea (1,528 kilometers, or 949 miles across). North is toward the top of the image and rotated 23 degrees to the left.</p><p>The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on July 14, 2008. The view was obtained at a distance of approximately 506,000 kilometers (315,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 32 degrees. Image scale is 3 kilometers (2 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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA10451" onclick="window.open(this.href); return false;" title="Voir l'image PIA10451: Rhea Before the Eclipse sur le site de la NASA">Voir l'image PIA10451: Rhea Before the Eclipse sur le site de la NASA.</a></div>
PIA10451: Rhea Before the Eclipse
<h1>PIA10464: Bright Rays</h1><div class="PIA10464" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Rhea's bright ray crater features prominently in this southern view. The feature is surrounded by bright ejecta—material thrown outward by the impact that formed the crater.</p><p>The view looks toward high southern latitudes on Rhea (1,528 kilometers, or 949 miles across) from a perspective 49 degrees below the icy moon's equator. Rhea's south pole is at bottom center.</p><p>The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on July 29, 2008. The view was acquired at a distance of approximately 413,000 kilometers (257,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 44 degrees. Image scale is 2 kilometers (1 mile) 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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA10464" onclick="window.open(this.href); return false;" title="Voir l'image PIA10464: Bright Rays sur le site de la NASA">Voir l'image PIA10464: Bright Rays sur le site de la NASA.</a></div>
PIA10464: Bright Rays
<h1>PIA10474: Rhea's Roughness</h1><div class="PIA10474" lang="en" style="width:585px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The sun's low angle near the terminator highlights the topography of craters within Rhea's wispy terrain.</p><p>A similar view, <a href="/catalog/PIA06578">PIA06578</a>, shows this region from a slightly different perspective and in natural color.</p><p>This view looks toward the trailing hemisphere of Rhea (1,528 kilometers, or 949 miles across). North is toward the top of the image.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 10, 2008. The view was acquired at a distance of approximately 758,000 kilometers (471,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 51 degrees. Image scale is 5 kilometers (3 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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA10474" onclick="window.open(this.href); return false;" title="Voir l'image PIA10474: Rhea's Roughness sur le site de la NASA">Voir l'image PIA10474: Rhea's Roughness sur le site de la NASA.</a></div>
PIA10474: Rhea's Roughness
<h1>PIA10494: Icy Profile</h1><div class="PIA10494" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The Cassini spacecraft looks toward Rhea's cratered, icy landscape with the dark line of Saturn's ringplane and the planet's murky atmosphere as a background.</p><p>Rhea is Saturn's second-largest moon, at 1,528 kilometers (949 miles) across. </p><p>This view looks toward the unilluminated side of the rings from less than a degree above the ringplane.</p><p>Images taken using red, green and blue spectral filters were combined to create this natural color view. The images were acquired with the Cassini spacecraft narrow-angle camera on July 17, 2007 at a distance of approximately 1.2 million kilometers (770,000 miles) from Rhea. 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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA10494" onclick="window.open(this.href); return false;" title="Voir l'image PIA10494: Icy Profile sur le site de la NASA">Voir l'image PIA10494: Icy Profile sur le site de la NASA.</a></div>
PIA10494: Icy Profile
<h1>PIA10531: Opposing Rhea</h1><div class="PIA10531" lang="en" style="width:536px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>A bright ray crater dominates this view of the leading hemisphere of Rhea, obtained at a time when the Sun was nearly aligned behind the Cassini spacecraft, or "opposition."</p><p>At opposition, shadows disappear, making topography appear less rugged. Consequently, in this view, topographic features such as crater walls are harder to see. </p><p>See <a href="/catalog/PIA08402">PIA08402</a> for a close-up view of Rhea.</p><p>The image was taken with the Cassini spacecraft narrow-angle camera on Oct. 5, 2008 using a spectral filter sensitive to wavelengths of ultraviolet light centered at 338 nanometers. The view was obtained at a distance of approximately 869,000 kilometers (540,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 4 degrees. Image scale is 5 kilometers (3 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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA10531" onclick="window.open(this.href); return false;" title="Voir l'image PIA10531: Opposing Rhea sur le site de la NASA">Voir l'image PIA10531: Opposing Rhea sur le site de la NASA.</a></div>
PIA10531: Opposing Rhea
<h1>PIA10533: Icy Impact</h1><div class="PIA10533" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The Cassini spacecraft obtained this view of a bright ray crater on the southern portions of Rhea's leading hemisphere.</p><p>The impact that produced the bright rays seen here excavated material from below the surface which is brighter than the surrounding terrain on which it fell.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 26, 2008 at a distance of approximately 463,000 kilometers (288,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 58 degrees. Image scale is 3 kilometers (2 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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA10533" onclick="window.open(this.href); return false;" title="Voir l'image PIA10533: Icy Impact sur le site de la NASA">Voir l'image PIA10533: Icy Impact sur le site de la NASA.</a></div>
PIA10533: Icy Impact
<h1>PIA10542: Where Have All the Shadows Gone?</h1><div class="PIA10542" lang="en" style="width:582px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The Cassini spacecraft acquired this view of Rhea's leading hemisphere near "opposition," or with the Sun almost directly behind the camera. </p><p>Under this geometry, topography appears less rugged because crater rims and hills hide their own shadows. Consequently, in this view, the contrast between ejecta from Rhea's bright ray crater and the surrounding terrain is subdued, making the rays barely discernible. (Look towards the upper left hand side to see the rays.)</p><p>In this image, the brightest features are sunward-facing crater walls.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 29, 2008 at a distance of approximately 1.346 million kilometers (836,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of about 1 degree. Image scale is 8 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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA10542" onclick="window.open(this.href); return false;" title="Voir l'image PIA10542: Where Have All the Shadows Gone? sur le site de la NASA">Voir l'image PIA10542: Where Have All the Shadows Gone? sur le site de la NASA.</a></div>
PIA10542: Where Have All the Shadows Gone?
<h1>PIA10555: Washed Out Rhea</h1><div class="PIA10555" lang="en" style="width:527px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>As the Cassini spacecraft slid between the Sun and Rhea, it caught this view of the moon at almost full opposition.</p><p>North on Rhea is up in this image, and, in the southern hemisphere, the faint outlines of a ray crater are visible. Lines, or rays, of debris from an impact streak outward from the crater on the left.</p><p>This view looks toward the leading hemisphere of Rhea with a Sun-Rhea-spacecraft, or phase, angle of about 0.4 degrees. </p><p>With the sun almost directly behind Cassini, topographic details such as the crater are washed out by the sun's brightness. More contrast between these details is visible from greater phase angles (see <a href="/catalog/PIA07609">see PIA07609</a>). </p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Oct. 27, 2008 at a distance of approximately 1.285 million kilometers (799,000 miles) from Rhea. Image scale is 8 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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA10555" onclick="window.open(this.href); return false;" title="Voir l'image PIA10555: Washed Out Rhea sur le site de la NASA">Voir l'image PIA10555: Washed Out Rhea sur le site de la NASA.</a></div>
PIA10555: Washed Out Rhea
<h1>PIA11143: Darkness Falls on Rhea</h1><div class="PIA11143" lang="en" style="width:695px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/archive/PIA11143.mov" class="external free" target="wpext"></a><br />Click on the image for the movie</p><p>The Cassini spacecraft's narrow-angle camera captured Saturn's moon Rhea as it gradually slipped into the planet's shadow—an event known as "ingress" —on Aug. 19, 2008. </p><p>Seventeen consecutive clear-filter images are in this movie showing an eclipse ingress across the Saturn-facing hemisphere of Rhea. Because sunlight still penetrates the planet's upper atmosphere and the sun has a finite size, the shadow of Saturn cast onto Rhea does not form a sharp line. </p><p>North on Saturn and Rhea is up in these images. The shadow moves from the upper left to lower right (northwest to southeast) because the moon's orbital plane around Saturn is inclined relative to the path, called the ecliptic, that the sun takes around the moon as viewed from its surface.</p><p>With Saturn approaching its August 2009 equinox in its orbit around the sun, the motion of the planet's shadow during future eclipses will trend more towards west-to-east (left-to-right) on ingress. After 2009, the trend will reverse, and the motion of Saturn's shadow will become more southwest-to-northeast, until the inclination of the orbital plane (relative to the ecliptic) becomes so large that Saturn's shadow no longer intersects with the orbits of moons such as Rhea and eclipse "season" ends. </p><p>The first frame of the movie displays Rhea's hemispherical albedo (brightness) dichotomy. The left half of the moon, its leading hemisphere, is remarkably brighter than the right half, its trailing hemisphere. Saturn's E-ring particles, which have their origins in the famous jets of the small moon Enceladus, preferentially impact Rhea's leading hemisphere, churning up its surface and enhancing its . Saturn's extremely tenuous E ring is so expansive that at least 11 moons orbit within it.</p><p>These images were acquired by NASA's Cassini spacecraft at a solar phase, or sun-Rhea-spacecraft, angle of about 28 degrees at a distance of approximately 450,000 kilometers (280,000 miles). Image scale is around 2.7 kilometers (1.7 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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA11143" onclick="window.open(this.href); return false;" title="Voir l'image PIA11143: Darkness Falls on Rhea sur le site de la NASA">Voir l'image PIA11143: Darkness Falls on Rhea sur le site de la NASA.</a></div>
PIA11143: Darkness Falls on Rhea
<h1>PIA11144: 'Tis the Season for Spokes</h1><div class="PIA11144" lang="en" style="width:763px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/archive/PIA11144.mov" class="external free" target="wpext"></a><br />Click on the image for the movie</p><p>Dark spokes dance around Saturn's B ring in this series of movies comprised of images taken with Cassini's wide-angle camera. </p><p>This animation is a concatenation of spoke movies acquired by NASA's Cassini spacecraft in the second half of 2008 on Aug. 21, Sept. 19, Sept. 26, Oct. 11, and Nov. 25. </p><p>As Saturn nears equinox in August 2009 and the sun angle on the ring plane decreases, spokes become common sights in Cassini images, just as they were in Voyager images (See <a href="/catalog/PIA02275">PIA02275</a>). The planet's orbital period is 29.5 years, so Saturn has nearly made one complete trip around the sun since the flybys of the two Voyager spacecraft in 1980 and 1981, allowing Cassini to closely match Voyager's viewing geometry.</p><p>Each of these five movies shows the sunlit side of the rings at low solar phase, or spacecraft-rings-sun, angles. The spokes appear dark against Saturn's B ring at low phase angles because the particles within them scatter light more efficiently in the forward direction (away from Cassini) than the surrounding larger ring particles. In the opposite viewing geometry, at high phase angles, spokes appear bright relative to surrounding ring particles (See <a href="/catalog/PIA07807">PIA07807</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" class="external free" target="wpext">http://saturn.jpl.nasa.gov/</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org" class="external free" target="wpext">http://ciclops.org</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA11144" onclick="window.open(this.href); return false;" title="Voir l'image PIA11144: 'Tis the Season for Spokes sur le site de la NASA">Voir l'image PIA11144: 'Tis the Season for Spokes sur le site de la NASA.</a></div>
PIA11144: 'Tis the Season for Spokes
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