Galerie de photos des anneaux de la planète Saturne

<h1>PIA10408: Tight Spiral</h1><div class="PIA10408" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This high-resolution view shows, at left, a spiral density wave in Saturn's inner B ring. A spiral density wave is a spiral-shaped massing of particles that tightly winds many times around the planet. These waves decrease in wavelength with increasing distance from the planet.</p><p>Scientists use images like this one to understand the mass of the rings and the collisional dynamics of the ring particles.</p><p>The view looks toward the sunlit side of the rings from about 50 degrees below the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 10, 2008. The view was obtained at a distance of approximately 279,000 kilometers (173,000 miles) from Saturn. Image scale is 1 kilometer (0.6 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/PIA10408" onclick="window.open(this.href); return false;" title="Voir l'image PIA10408: Tight Spiral sur le site de la NASA">Voir l'image PIA10408: Tight Spiral sur le site de la NASA.</a></div>
PIA10408: Tight Spiral
<h1>PIA10410: Behind the Veil</h1><div class="PIA10410" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Saturn's northern hemisphere is visible through its disc of icy particles.</p><p>This view looks toward the sunlit side of the A ring from about 21 degrees below the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 19, 2008. The view was obtained at a distance of approximately 806,000 kilometers (501,000 miles) from Saturn. Image scale is about 4 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/PIA10410" onclick="window.open(this.href); return false;" title="Voir l'image PIA10410: Behind the Veil sur le site de la NASA">Voir l'image PIA10410: Behind the Veil sur le site de la NASA.</a></div>
PIA10410: Behind the Veil
<h1>PIA10419: Rough Around the Edges</h1><div class="PIA10419" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This detailed look at Saturn's A ring captures Daphnis in the narrow Keeler Gap. The small moon creates complex wave patterns in the gap edges that Cassini scientists are working to understand.</p><p>To the right of the Keeler Gap, the outer A-ring edge is significantly brighter than the rest of the ring.</p><p>This view looks toward the unilluminated side of the rings from about 32 degrees above the ringplane. Daphnis is 8 kilometers (5 miles) wide.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 31, 2008. The view was acquired at a distance of approximately 1 million kilometers (629,000 miles) from Saturn. Image scale is 6 kilometers (4 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/PIA10419" onclick="window.open(this.href); return false;" title="Voir l'image PIA10419: Rough Around the Edges sur le site de la NASA">Voir l'image PIA10419: Rough Around the Edges sur le site de la NASA.</a></div>
PIA10419: Rough Around the Edges
<h1>PIA10421: Perturbed Edge</h1><div class="PIA10421" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The Cassini spacecraft continues to investigate the intriguing structure in Saturn's outer B-ring edge. This region has a much perturbed character compared to the orderly rings around it.</p><p>Ring scientists think these features may be groupings of particles that clump together under to their own gravity. The clumping features may result from the fact that this region is compressed periodically, owing to perturbations by the moon Mimas. Mimas maintains this ring edge via a gravitational resonance.</p><p>This view looks toward the sunlit side of the rings from about 51 degrees below the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 2, 2008. The view was acquired at a distance of approximately 185,000 kilometers (115,000 miles) from Saturn. Image scale is 771 meters (2,530 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" 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/PIA10421" onclick="window.open(this.href); return false;" title="Voir l'image PIA10421: Perturbed Edge sur le site de la NASA">Voir l'image PIA10421: Perturbed Edge sur le site de la NASA.</a></div>
PIA10421: Perturbed Edge
<h1>PIA10423: Spokes on the Wheel</h1><div class="PIA10423" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>As they wheel about the planet, Saturn's sunlit rings often exhibit dark, radial markings called spokes.</p><p>Spokes are seen only in the broad B ring, and can also appear bright in certain viewing geometries (see <a href="/catalog/PIA08302">PIA08302</a>).</p><p>This view looks toward the sunlit side of the rings from about 11 degrees below the ringplane.</p><p>Pandora (81 kilometers, or 50 miles across) is a speck above the rings at left. The planet's shadow darkens the ringplane at lower right.</p><p>The image was taken in visible light with the Cassini spacecraft wide-angle camera on June 3, 2008. The view was acquired at a distance of approximately 1 million kilometers (636,000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 19 degrees. Image scale is 61 kilometers (38 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/PIA10423" onclick="window.open(this.href); return false;" title="Voir l'image PIA10423: Spokes on the Wheel sur le site de la NASA">Voir l'image PIA10423: Spokes on the Wheel sur le site de la NASA.</a></div>
PIA10423: Spokes on the Wheel
<h1>PIA10425: Peace Above, Turmoil Below</h1><div class="PIA10425" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Tethys passes silently between Saturn and Cassini as a train of storms rumbles through the planet's southern hemisphere. The rings' shadows darken the planet at top. </p><p>Tethys is 1,062 kilometers (660 miles) across.</p><p>This view looks toward the unilluminated side of the rings from about 2 degrees above the ringplane.</p><p>The image was taken in visible red light with the Cassini spacecraft wide-angle camera on June 4, 2008. The view was acquired at a distance of approximately 1.2 million kilometers (756,000 miles) from Saturn. Image scale is 69 kilometers (43 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/PIA10425" onclick="window.open(this.href); return false;" title="Voir l'image PIA10425: Peace Above, Turmoil Below sur le site de la NASA">Voir l'image PIA10425: Peace Above, Turmoil Below sur le site de la NASA.</a></div>
PIA10425: Peace Above, Turmoil Below
<h1>PIA10426: Beyond the Limb</h1><div class="PIA10426" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Saturn's C ring emerges from behind the planet's hazy limb.</p><p>This view looks toward the sunlit side of the rings from about 15 degrees below the ringplane.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 17, 2008. The view was obtained at a distance of approximately 937,000 kilometers (582,000 miles) from Saturn. 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/PIA10426" onclick="window.open(this.href); return false;" title="Voir l'image PIA10426: Beyond the Limb sur le site de la NASA">Voir l'image PIA10426: Beyond the Limb sur le site de la NASA.</a></div>
PIA10426: Beyond the Limb
<h1>PIA10428: Moons in Transit</h1><div class="PIA10428" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Two small moons race across the face of Saturn. The planet's icy rings cast dark shadows onto the feathery clouds below.</p><p>Janus (179 kilometers, or 111 miles across) appears above the rings near center. Pandora (81 kilometers, or 50 miles across) is slightly closer to Saturn, to the left of Janus.</p><p>This view looks toward the sunlit side of the rings from about 7 degrees below the ringplane. The image was taken with the Cassini spacecraft wide-angle camera on June 18, 2008 using a combination of spectral filters sensitive to wavelengths of polarized infrared light centered at 752 and 705 nanometers. The view was obtained at a distance of approximately 1.1 million kilometers (683,000 miles) from Saturn. Image scale is 62 kilometers (39 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/PIA10428" onclick="window.open(this.href); return false;" title="Voir l'image PIA10428: Moons in Transit sur le site de la NASA">Voir l'image PIA10428: Moons in Transit sur le site de la NASA.</a></div>
PIA10428: Moons in Transit
<h1>PIA10430: Encke's Moon</h1><div class="PIA10430" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Saucer-shaped Pan glides through the Encke Gap in Saturn's rings.</p><p>See <a href="/catalog/PIA08405">PIA08405</a> for higher resolution views of the "saucer moons" Pan (28 kilometers, or 17 miles across at its widest point) and Atlas (30 kilometers, or 19 miles across at its widest point).</p><p>This view looks toward the sunlit side of the rings from about 20 degrees below the ringplane. The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on June 10, 2008 at a distance of approximately 799,000 kilometers (496,000 miles) from Pan. 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/PIA10430" onclick="window.open(this.href); return false;" title="Voir l'image PIA10430: Encke's Moon sur le site de la NASA">Voir l'image PIA10430: Encke's Moon sur le site de la NASA.</a></div>
PIA10430: Encke's Moon
<h1>PIA10432: Obscuring Epimetheus</h1><div class="PIA10432" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Saturn's narrow F ring partly obscures the small moon Epimetheus. Interior to the F ring is the bright A ring.</p><p>Epimetheus (113 kilometers, or 70 miles across at its widest point) is on the side of the rings opposite from Cassini.</p><p>This view looks toward the sunlit side of the rings from about 2 degrees below the ringplane.The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 11, 2008. The view was acquired at a distance of approximately 1.2 million kilometers (766,000 miles) from Epimetheus. 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/PIA10432" onclick="window.open(this.href); return false;" title="Voir l'image PIA10432: Obscuring Epimetheus sur le site de la NASA">Voir l'image PIA10432: Obscuring Epimetheus sur le site de la NASA.</a></div>
PIA10432: Obscuring Epimetheus
<h1>PIA10446: Scattered Sunshine</h1><div class="PIA10446" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Saturn's icy rings shine in scattered sunlight in this view, which looks toward the unilluminated northern side of the rings from about 15 degrees above the ringplane.</p><p>The Sun currently illuminates the rings from the south. Some of the sunlight not reflected from the rings' southern face is scattered through the countless particles, setting the rings aglow.</p><p>The inner F-ring shepherd moon Prometheus (86 kilometers, or 53 miles across at its widest point) appears at lower left.</p><p>Images taken using red, green and blue spectral filters were combined to create this natural color view. Bright clumps of material in the narrow F ring moved in their orbits between each of the color exposures, creating a chromatic misalignment in several places that provides some sense of the continuous motion within the ring system.</p><p>The images were obtained with the Cassini spacecraft wide-angle camera on July 4, 2008 at a distance of approximately 1.2 million kilometers (770,000 miles) from Saturn. The Sun-ring-spacecraft, or phase, angle was 28 degrees. Image scale is 70 kilometers (44 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/PIA10446" onclick="window.open(this.href); return false;" title="Voir l'image PIA10446: Scattered Sunshine sur le site de la NASA">Voir l'image PIA10446: Scattered Sunshine sur le site de la NASA.</a></div>
PIA10446: Scattered Sunshine
<h1>PIA10448: F Ring Channels</h1><div class="PIA10448" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>A train of diagonal channels in Saturn's F ring follows behind the moon Prometheus. Each of these features was created during a previous close approach of Prometheus to the ring. </p><p>When the moon is at the farthest point in its orbit of the planet, it strays close to (and often into) the F ring. The resulting gravitational disturbance leaves behind the channels seen here.</p><p>Atlas (30 kilometers, or 19 miles across at its widest point) appears at lower right.</p><p>This view looks toward the unilluminated side of the rings from about 27 degrees above the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on July 5, 2008. The view was acquired at a distance of approximately 1.1 million kilometers (675,000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 34 degrees. Image scale is 6 kilometers (4 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/PIA10448" onclick="window.open(this.href); return false;" title="Voir l'image PIA10448: F Ring Channels sur le site de la NASA">Voir l'image PIA10448: F Ring Channels sur le site de la NASA.</a></div>
PIA10448: F Ring Channels
<h1>PIA10450: Like Spokes of Old</h1><div class="PIA10450" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Cassini spacecraft spots a couple of large, wedge-shaped spokes in Saturn's B ring. </p><p>pokes are similar in appearance to those seen by the Voyager spacecraft (see <a href="/catalog/ PIA02275">PIA02275</a>).</p><p>Prometheus (86 kilometers, or 53 miles across) can be spotted interior to the narrow F ring at left. Pan (28 kilometers, or 17 miles across at its widest point) is barely visible within the Encke Gap, below center.</p><p>This view looks toward the sunlit side of the rings from about 26 degrees below the ringplane. Pan has been brightened in this image for better visibility. The image was taken in visible light with the Cassini spacecraft wide-angle camera on July 8, 2008. The view was acquired at a distance of approximately 749,000 kilometers (465,000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 31 degrees. Image scale is 41 kilometers (26 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/PIA10450" onclick="window.open(this.href); return false;" title="Voir l'image PIA10450: Like Spokes of Old sur le site de la NASA">Voir l'image PIA10450: Like Spokes of Old sur le site de la NASA.</a></div>
PIA10450: Like Spokes of Old
<h1>PIA10452: Structure in the Spiral</h1><div class="PIA10452" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This high-resolution view shows incredible detail within a spiral density wave within Saturn's A ring.</p><p>A spiral density wave is a spiral-shaped massing of particles that tightly winds many times around the planet. These waves decrease in wavelength with increasing distance from the planet.</p><p>The wave that covers a broad strip across the center of the image is created by a gravitational resonance with the moon Janus. For every sixth orbit of the ring particles at this radius from Saturn, Janus makes five orbits, meaning that the moon is continually providing a gravitational kick to particles in this region of the rings.</p><p>A couple of the peaks in the broad Janus-created wave appear bunched together, possibly owing to Janus' orbit being changed when it swaps places with its co-orbital moon Epimetheus (see <a href="/catalog/PIA08170">PIA08170</a>).</p><p>This view looks toward the sunlit side of the rings from about 34 degrees below the ringplane.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on July 21, 2008. The view was acquired at a distance of approximately 170,000 kilometers (106,000 miles) from Saturn. Image scale is 669 meters (2,194 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" 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/PIA10452" onclick="window.open(this.href); return false;" title="Voir l'image PIA10452: Structure in the Spiral sur le site de la NASA">Voir l'image PIA10452: Structure in the Spiral sur le site de la NASA.</a></div>
PIA10452: Structure in the Spiral
<h1>PIA10453: F Ring in Between</h1><div class="PIA10453" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Two ring moons sweep through the scene as Cassini focuses on Saturn's intriguing F ring.</p><p>Daphnis (8 kilometers, or 5 miles across) is seen at right with its edge waves in the Keeler Gap. Pandora (81 kilometers, or 50 miles across) appears at left.</p><p>This image is part of a movie sequence designed to observe the appearance of the F ring and its faint flanking ringlets. As such, the exposure was not optimized to image Pandora, therefore the moon is overexposed.</p><p>This view looks toward the unilluminated side of the rings from about 22 degrees above the ringplane.The image was taken in visible light with the Cassini spacecraft narrow-angle camera on July 5, 2008. The view was obtained at a distance of approximately 1.2 million kilometers (718,000 miles) from Saturn. Image scale is 7 kilometers (4 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/PIA10453" onclick="window.open(this.href); return false;" title="Voir l'image PIA10453: F Ring in Between sur le site de la NASA">Voir l'image PIA10453: F Ring in Between sur le site de la NASA.</a></div>
PIA10453: F Ring in Between
<h1>PIA10454: Out of Darkness</h1><div class="PIA10454" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Saturn's rings burst out of shadow and curve gracefully around the planet. Prometheus (86 kilometers, or 53 miles across at its widest point) appears as a bright speck touching the inside of the narrow F ring. Atlas (30 kilometers, 19 miles across at its widest point) is also visible, faintly, upward and to the left of Prometheus, just outside the A ring edge.</p><p>Saturn's shadow cuts across the rings at top right. </p><p>Several dark, narrow spokes are faintly visible near the B-ring ansa, left of center.</p><p>This view looks toward the unilluminated side of the rings from about 13 degrees above the ringplane. Images taken using red, green and blue spectral filters were combined to create this natural color view. The images were obtained with the Cassini spacecraft wide-angle camera on July 4, 2008 at a distance of approximately 1.2 million kilometers (775,000 miles) from Saturn. Image scale is 71 kilometers (44 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/PIA10454" onclick="window.open(this.href); return false;" title="Voir l'image PIA10454: Out of Darkness sur le site de la NASA">Voir l'image PIA10454: Out of Darkness sur le site de la NASA.</a></div>
PIA10454: Out of Darkness
<h1>PIA10468: Disturbing Moons</h1><div class="PIA10468" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This mosaic of two Cassini images shows Pan and Prometheus creating features in nearby rings.</p><p>Pan (28 kilometers, or 17 miles across), in the Encke Gap at left, is trailed by a series of edge waves in the outer boundary of the gap. Prometheus (86 kilometers, or 53 miles across at its widest point) just touches the inner edge of Saturn's F ring at right, and is followed by a series of dark channels in the ring, which were caused by the passage of Prometheus through the F ring on previous orbits.</p><p>This view looks toward the unilluminated side of the rings from about 3 degrees above the ringplane. The images were taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 15, 2008. The view was obtained at a distance of approximately 1.2 million kilometers (746,000 miles) from Pan and Prometheus. Image scale is 7 kilometers (5 miles) per pixel on both moons.</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/PIA10468" onclick="window.open(this.href); return false;" title="Voir l'image PIA10468: Disturbing Moons sur le site de la NASA">Voir l'image PIA10468: Disturbing Moons sur le site de la NASA.</a></div>
PIA10468: Disturbing Moons
<h1>PIA10470: Evidence of Collision</h1><div class="PIA10470" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The three bright, finger-like jets of material seen here suggest that a small object has collided with the core of Saturn's F ring.</p><p>Cassini spacecraft imaging scientists have shown that the F-ring shepherd moon Prometheus influences the structure of the ring in two ways: by creating streamer-channel features as it closely approaches (and partially passes into) the ring (see <a href="/catalog/PIA08397">PIA08397</a>) and by perturbing the orbits of small objects within the F ring region which then exert their own influence on nearby ring particles, as seen here. </p><p>These small, embedded objects could be temporary clumps of particles, but scientists think at least one of the objects could be a more permanent moonlet.</p><p>This view looks toward the sunlit side of the rings from about 40 degrees below the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 20, 2008. The view was obtained at a distance of approximately 685,000 kilometers (426,000 miles) from Saturn and at a Sun-ring-spacecraft, or phase, angle of 40 degrees. Image scale is about 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/PIA10470" onclick="window.open(this.href); return false;" title="Voir l'image PIA10470: Evidence of Collision sur le site de la NASA">Voir l'image PIA10470: Evidence of Collision sur le site de la NASA.</a></div>
PIA10470: Evidence of Collision
<h1>PIA10472: Arc in Motion</h1><div class="PIA10472" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The bright arc of material in Saturn's G ring is seen here as it rounds the ring's edge, or ansa. The ring arc orbits Saturn along the inner edge of the G ring.</p><p>Cassini spacecraft scientists think the arc contains a population of relatively large, icy particles held in place by a gravitational an orbital resonance with the moon Mimas. Micrometeoroids collide with the large particles, releasing smaller, dust-sized particles that brighten the arc. The plasma in the giant planet's magnetic field sweeps through this arc continually, dragging out the fine particles and creating the G ring. The ring arc orbits Saturn along the inner edge of the G ring. </p><p>The diffuse glow at left shows the extended nature of this faint ring.</p><p>The ring moved against the background stars during this exposure, creating the star trails seen here.</p><p>The view looks toward the sunlit side of the rings from less than a degree below the ringplane.</p><p>The upper, brighter ring section is the one closer to Cassini. Here, the ring arc is coming toward Cassini and moving toward right as it rounds the ansa.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 22, 2008. The view was acquired at a distance of approximately 1.2 million kilometers (740,000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 13 degrees. Image scale is 7 kilometers (4 miles) per pixel in the radial, or outward-from-Saturn, direction.</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/PIA10472" onclick="window.open(this.href); return false;" title="Voir l'image PIA10472: Arc in Motion sur le site de la NASA">Voir l'image PIA10472: Arc in Motion sur le site de la NASA.</a></div>
PIA10472: Arc in Motion
<h1>PIA10475: Pan and Janus</h1><div class="PIA10475" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Two of Saturn's moons coast along the outer edge of the main ring system. The orbits of seven small moons cluster just outside the F ring—between the orbits of Pan and the co-orbital moons Janus and Epimetheus.</p><p>Pan (28 kilometers, or 17 miles across at its widest point) appears as a bright dot within the Encke Gap, right of center. Janus (179 kilometers, 111 miles across at its widest point) lies outside the A and F rings, below center.</p><p>This view looks toward the sunlit side of the rings from about 2 degrees below the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 22, 2008. The view was obtained at a distance of approximately 1.3 million kilometers (808,000 miles) from Janus. 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/PIA10475" onclick="window.open(this.href); return false;" title="Voir l'image PIA10475: Pan and Janus sur le site de la NASA">Voir l'image PIA10475: Pan and Janus sur le site de la NASA.</a></div>
PIA10475: Pan and Janus
<h1>PIA10476: Saturn by Ringshine</h1><div class="PIA10476" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Large regions of Saturn's night side are illuminated by the planet's gleaming rings. Except for a sliver of the sunlit crescent at left, this view shows a part of the planet lit almost entirely by ringshine.</p><p>The southern hemisphere, at bottom, receives its illumination from sunlight that strikes the rings' southern face and is reflected onto the planet. The northern hemisphere, at top, is lit by the feeble light that wends its way through countless ring particles to emerge on the rings' north face.</p><p>Despite the dim lighting on the northern part of the planet, many cloud features can be seen there nevertheless.</p><p>This view was acquired from about 44 degrees above the ringplane. At bottom, the planet's shadow stretches across the D and C rings.</p><p>Images taken using red, green and blue spectral filters were combined to create this natural color view. The images were obtained with the Cassini spacecraft wide-angle camera on April 23, 2007 at a distance of approximately 901,000 kilometers (560,000 miles) from Saturn. Image scale is 50 kilometers (31 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/PIA10476" onclick="window.open(this.href); return false;" title="Voir l'image PIA10476: Saturn by Ringshine sur le site de la NASA">Voir l'image PIA10476: Saturn by Ringshine sur le site de la NASA.</a></div>
PIA10476: Saturn by Ringshine
<h1>PIA10479: Pandora's Shadow</h1><div class="PIA10479" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Saturn's moon Pandora casts its shadow upon the F ring. Moon shadows upon the rings will become an increasingly common sight for Cassini as equinox approaches and the Sun moves northward through the ringplane.</p><p>This observation was optimized to show faint details in the F ring, leaving Pandora (81 kilometers, 50 miles across at its widest point) overexposed. </p><p>The view looks toward the unilluminated side of the rings from about 37 degrees above the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 17, 2008. The view was acquired at a distance of approximately 864,000 kilometers (537,000 miles) from Pandora and at a Sun-Pandora-spacecraft, or phase, angle of 48 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/PIA10479" onclick="window.open(this.href); return false;" title="Voir l'image PIA10479: Pandora's Shadow sur le site de la NASA">Voir l'image PIA10479: Pandora's Shadow sur le site de la NASA.</a></div>
PIA10479: Pandora's Shadow
<h1>PIA10481: Gathering of Moons</h1><div class="PIA10481" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>A trio of icy moons crowds together along the Cassini spacecraft's line of sight.</p><p>Brilliant Enceladus (504 kilometers, or 313 miles across) sits on the planet's shadow-draped limb at center; Pandora (81 kilometers, or 50 miles across at its widest point) is a bright speck hovering near the rings; and Mimas (396 kilometers, or 246 miles across) is seen at lower right.</p><p>This view looks toward the sunlit side of the rings from about a degree below the ringplane. The image was taken in visible green light with the Cassini spacecraft wide-angle camera on June 28, 2007. The view was obtained at a distance of approximately 291,000 kilometers (181,000 miles) from Enceladus. Scale in the image ranges from 17 kilometers (11 miles) per pixel on Enceladus to 32 kilometers (20 miles) per pixel on Saturn, in the background.</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/PIA10481" onclick="window.open(this.href); return false;" title="Voir l'image PIA10481: Gathering of Moons sur le site de la NASA">Voir l'image PIA10481: Gathering of Moons sur le site de la NASA.</a></div>
PIA10481: Gathering of Moons
<h1>PIA10482: Moonmade Ringscape</h1><div class="PIA10482" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Many of the elegant structures in Saturn's rings result from the influence of the planet's moons. Seen here at center is the Cassini Division, flanked at top and bottom by the outer B-ring edge and the inner A-ring edge, respectively. </p><p>The gravitational influence of the moon Mimas is responsible for the Cassini Division. See <a href="/catalog/PIA08389">PIA08389</a> for a labeled map of Saturn's rings.</p><p>The view looks toward the unilluminated side of the rings from about 33 degrees above the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 2, 2008. The view was obtained at a distance of approximately 1 million kilometers (639,000 miles) from Saturn. Image scale is 6 kilometers (4 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/PIA10482" onclick="window.open(this.href); return false;" title="Voir l'image PIA10482: Moonmade Ringscape sur le site de la NASA">Voir l'image PIA10482: Moonmade Ringscape sur le site de la NASA.</a></div>
PIA10482: Moonmade Ringscape
<h1>PIA10487: Many Colors, Many Moons</h1><div class="PIA10487" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Four moons huddle near Saturn's multi-hued disk. </p><p>The coloration of the planet's northern hemisphere has changed noticeably since the Cassini spacecraft's arrival in orbit in mid-2004. Imaging scientists are working to understand the causes of this change, which is suspected to be a seasonal effect.</p><p>Giant Titan (5,150 kilometers, or 3,200 miles across), with its darker winter hemisphere, dominates the smaller moons in the scene. Beneath and left of Titan is Janus (181 kilometers, or 113 miles across). Mimas (397 kilometers, or 247 miles across) appears as a bright dot close to the planet and beneath the rings. Prometheus (102 kilometers, or 63 miles across) is a faint speck hugging the rings between the two small moons.</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 view was acquired with the Cassini spacecraft wide-angle camera on Oct. 26, 2007, at a distance of approximately 1.5 million kilometers (920,000 miles) from Saturn and 2.7 million kilometers (1.7 million miles) from Titan. Image scale is 89 kilometers (55 miles) per pixel on Saturn and 164 kilometers (102 miles) per pixel on Titan.</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/PIA10487" onclick="window.open(this.href); return false;" title="Voir l'image PIA10487: Many Colors, Many Moons sur le site de la NASA">Voir l'image PIA10487: Many Colors, Many Moons sur le site de la NASA.</a></div>
PIA10487: Many Colors, Many Moons
<h1>PIA10489: Warped F Ring</h1><div class="PIA10489" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The gravity of Prometheus alters the orbits of the fine, icy particles in Saturn's F ring, creating dazzling structures like those seen here.</p><p>Each of these diagonal features, called "streamer-channels" by ring scientists, represents a single close approach of Prometheus (86 kilometers, or 53 miles across) to the inner edge of the ring.</p><p>This observation was optimized to show faint details in the F ring, leaving Prometheus (86 kilometers, or 53 miles across, at bottom) overexposed. </p><p>The view looks toward the unilluminated side of the rings from about 15 degrees above the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 30, 2008. The view was obtained at a distance of approximately 1.2 million kilometers (751,000 miles) from Saturn. Image scale is 7 kilometers (4 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/PIA10489" onclick="window.open(this.href); return false;" title="Voir l'image PIA10489: Warped F Ring sur le site de la NASA">Voir l'image PIA10489: Warped F Ring sur le site de la NASA.</a></div>
PIA10489: Warped F Ring
<h1>PIA10491: From A to F</h1><div class="PIA10491" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The Cassini spacecraft captures signs of activity on both sides of the Roche Division— the region between Saturn's A and F rings.</p><p>At right, the small moon Daphnis (8 kilometers, or 5 miles across) makes waves in the edges of the narrow Keeler Gap. At left are several minor kinks in the narrow core of the F ring.</p><p>This view looks toward the unilluminated side of the rings from about 18 degrees above the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 31, 2008. The view was acquired at a distance of approximately 1.2 million kilometers (735,000 miles) from Saturn. Image scale is 7 kilometers (4 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/PIA10491" onclick="window.open(this.href); return false;" title="Voir l'image PIA10491: From A to F sur le site de la NASA">Voir l'image PIA10491: From A to F sur le site de la NASA.</a></div>
PIA10491: From A to F
<h1>PIA10493: Eyes on the Rings</h1><div class="PIA10493" lang="en" style="width:739px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The Cassini spacecraft looks toward the sunlit face of Saturn's rings, whose shadows continue to slide southward on the planet toward their temporary disappearance during equinox in August 2009.</p><p>This two-frame color mosaic was created from images taken as part of a photometry observation of the rings. Photometry observations are useful for determining a host of ring particle properties.</p><p>This view looks toward the sunlit side of the rings from about 3 degrees below the ringplane. 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 wide-angle camera on Aug. 22, 2008 at a distance of approximately 1.2 million kilometers (728,000 miles) from Saturn. Image scale is 66 kilometers (41 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/PIA10493" onclick="window.open(this.href); return false;" title="Voir l'image PIA10493: Eyes on the Rings sur le site de la NASA">Voir l'image PIA10493: Eyes on the Rings sur le site de la NASA.</a></div>
PIA10493: Eyes on the Rings
<h1>PIA10499: The Unlit Face</h1><div class="PIA10499" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The Cassini spacecraft captures Saturn's main rings in a study of light and dark.</p><p>A bright knot is visible in the F ring near upper left. Ring scientists think features like this can be created when a small moonlet collides with the ring's core, leading to collisions that scatter fine, icy particles (see <a href="/catalog/PIA08290">PIA08290</a>).</p><p>This view looks toward the unilluminated side of the rings from about 16 degrees above the ringplane. The edge of Saturn's shadow forms a dark wedge on the rings at right.</p><p>The image was taken in visible green light with the Cassini spacecraft wide-angle camera on Sept. 22, 2008. The view was acquired at a distance of approximately 1.2 million kilometers (743,000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 27 degrees. Image scale is 68 kilometers (42 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/PIA10499" onclick="window.open(this.href); return false;" title="Voir l'image PIA10499: The Unlit Face sur le site de la NASA">Voir l'image PIA10499: The Unlit Face sur le site de la NASA.</a></div>
PIA10499: The Unlit Face
<h1>PIA10501: Two Kinds of Wave</h1><div class="PIA10501" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Many features in Saturn's rings are thought to be induced by the gravity of the planet's moons. This view shows two different kinds of waves that are thought to be produced by different moon-related effects.</p><p>Most of the waves seen here, including the prominent feature near center, are spiral density waves. These waves wrap around the planet many times like a watch spiral. They are the result of gravitational tugs by individual moons whose orbits are in a resonance with the particles at a specific distance from Saturn. </p><p>The bright and dark areas in the wave represent more-dense and less-dense regions of the ring. For this type of wave, the wavelength--the distance between bright peaks in each wave--decreases with increasing distance from Saturn (toward left in this image).</p><p>By contrast, the wavelength of the intense feature at right decreases toward Saturn (toward right here), indicating that this is a different kind of wave called a spiral bending wave. This wave also winds multiple times around Saturn, but it represents vertical undulations in the ring plane, like a corrugated tin roof. This type of wave is produced by gravitational tugs by moons on inclined orbits as they venture just slightly out of the ringplane.</p><p>Cassini scientists will be carefully watching for shadows cast by spiral bending waves as equinox occurs in Aug. 2009 and the Sun passes from the south side of the rings to the north side. The shadows could reveal the height of the bending waves, providing an indirect way to measure key properties of the ring.</p><p>This view looks toward the sunlit side of the rings from about 35 degrees below the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 25, 2008. The view was acquired at a distance of approximately 219,000 kilometers (136,000 miles) above the rings and at a Sun-ring-spacecraft, or phase, angle of 127 degrees. Image scale is 1 kilometer (0.6 mile) per pixel in the radial, or outward from Saturn direction and 2 kilometers (1 mile) per pixel in the longitudinal, or around Saturn, direction.</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/PIA10501" onclick="window.open(this.href); return false;" title="Voir l'image PIA10501: Two Kinds of Wave sur le site de la NASA">Voir l'image PIA10501: Two Kinds of Wave sur le site de la NASA.</a></div>
PIA10501: Two Kinds of Wave