Galerie de photos de Rhéa, satellite de la planète Saturne

<h1>PIA07554: Rhea's Bright Blemish</h1><div class="PIA07554" lang="en" style="width:785px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This view of Saturn's moon Rhea shows the tremendous bright splat that coats much of the moon's leading hemisphere. The bright feature may be impact-related and is visible in other Cassini images of Rhea (see <a href="/catalog/PIA07539">PIA07539</a>). Rhea is 1,528 kilometers (949 miles) across.</p><p>North on Rhea is up in this view.</p><p>The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on June 25, 2005, at a distance of approximately 1.1 million kilometers (700,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of less than one degree. Resolution in the original image was 7 kilometers (4 miles) per pixel. The image has been contrast-enhanced and magnified by a factor of two to aid visibility.</p><p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA07554" onclick="window.open(this.href); return false;" title="Voir l'image PIA07554: Rhea's Bright Blemish sur le site de la NASA">Voir l'image PIA07554: Rhea's Bright Blemish sur le site de la NASA.</a></div>
PIA07554: Rhea's Bright Blemish
<h1>PIA07566: Rhea: Polar View</h1><div class="PIA07566" lang="en" style="width:776px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Like the rest of Rhea's surface, the southern polar region of this Saturn moon has been extensively re-worked by cratering over the eons. This close-up shows that most sizeable craters have smaller, younger impact sites within them. Near the left lies an intriguing gash.</p><p>The largest well-defined crater visible here is an oval-shaped impact toward the upper right. The crater is 115 by 91 kilometers (71 by 57 miles) in size.</p><p>Cassini acquired this view during a distant flyby of Rhea (1,528 kilometers, or 949 miles across) on July 14, 2005.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera at a distance of approximately 239,000 kilometers (149,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 56 degrees. The image was obtained using a filter sensitive to wavelengths of infrared light centered at 930 nanometers. The image scale is about 1 kilometer (0.6 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 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/PIA07566" onclick="window.open(this.href); return false;" title="Voir l'image PIA07566: Rhea: Polar View sur le site de la NASA">Voir l'image PIA07566: Rhea: Polar View sur le site de la NASA.</a></div>
PIA07566: Rhea: Polar View
<h1>PIA07572: Above Rhea's South Pole</h1><div class="PIA07572" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Cassini looks upward at the south polar region on Rhea during a recent distant encounter. Rhea's icy surface is so heavily saturated with impact craters that the moon's limb, or edge, has a rugged, bumpy appearance. Rhea is 1,528 kilometers (949 miles) across.</p><p>The bright splotch seen here near the upper right is impact material (or ejecta) from a relatively fresh crater (see <a href="/catalog/PIA06648">PIA06648</a> for another view of this bright feature).</p><p>The image was taken with the Cassini spacecraft narrow-angle camera on July 14, 2005, at a distance of approximately 342,000 kilometers (212,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 36 degrees. The image was obtained using a filter sensitive to wavelengths of infrared light centered at 298 nanometers. The 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 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/PIA07572" onclick="window.open(this.href); return false;" title="Voir l'image PIA07572: Above Rhea's South Pole sur le site de la NASA">Voir l'image PIA07572: Above Rhea's South Pole sur le site de la NASA.</a></div>
PIA07572: Above Rhea's South Pole
<h1>PIA07575: Tirawa at Twilight</h1><div class="PIA07575" lang="en" style="width:467px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The giant Tirawa impact basin straddles the day and night boundary on Saturn's moon Rhea in this view from the Cassini spacecraft. The ancient basin is 5 kilometers (3 miles) deep in places, as measured in NASA Voyager images. The basin is 360 kilometers (220 miles) across.</p><p>The prominent bright splotch to the southeast of Tirawa is ejecta from a fairly fresh crater. This feature can be seen at much higher resolution in <a href="/catalog/PIA06648">PIA06648</a>. This view of Rhea (1,528 kilometers, or 949 miles across) reveals terrain slightly to the east of a similar Cassini view, released earlier (see <a href="/catalog/PIA07539">PIA07539</a>). The sunlit surface in this view is principally on the leading hemisphere of Rhea. North is up and rotated 13 degrees to the left.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 13, 2005, at a distance of approximately 2 million kilometers (1.2 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 50 degrees. Resolution in the original image was 12 kilometers (7 miles) per pixel. The image has been contrast-enhanced and magnified by a factor of two 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. 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/PIA07575" onclick="window.open(this.href); return false;" title="Voir l'image PIA07575: Tirawa at Twilight sur le site de la NASA">Voir l'image PIA07575: Tirawa at Twilight sur le site de la NASA.</a></div>
PIA07575: Tirawa at Twilight
<h1>PIA07583: Frame-Filling Rhea</h1><div class="PIA07583" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Saturn's moon Rhea is an alien ice world, but in this frame-filling view it is vaguely familiar. Here, Rhea's cratered surface looks in some ways similar to our own Moon, or the planet Mercury. But make no mistake -- Rhea's icy exterior would quickly melt if this moon were brought as close to the Sun as Mercury. Rhea is 1,528 kilometers (949 miles) across.</p><p>Instead, Rhea preserves a record of impacts at its post in the outer solar system. The large impact crater at the center left (near the terminator or boundary between day and night), called Izanagi, is just one of the numerous large impact basins on Rhea.</p><p>This view shows principally Rhea's southern polar region, centered on 58 degrees South, 265 degrees West.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 1, 2005, at a distance of approximately 255,000 kilometers (158,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 62 degrees. Image scale is 2 kilometers (1.2 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 was 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>. 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/PIA07583" onclick="window.open(this.href); return false;" title="Voir l'image PIA07583: Frame-Filling Rhea sur le site de la NASA">Voir l'image PIA07583: Frame-Filling Rhea sur le site de la NASA.</a></div>
PIA07583: Frame-Filling Rhea
<h1>PIA07606: Half-Moon</h1><div class="PIA07606" lang="en" style="width:453px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This half-lit view beautifully captures the ponderously old and cratered surface of Saturn's icy moon Rhea. Rhea is 1,528 kilometers (949 miles) across.</p><p>The sunlit terrain shown here is on the moon's leading hemisphere, on the side of Rhea that always faces toward Saturn. North is up and rotated 20 degrees to the left.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 21, 2005, at a distance of approximately 922,000 kilometers (573,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 88 degrees. The 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">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/PIA07606" onclick="window.open(this.href); return false;" title="Voir l'image PIA07606: Half-Moon sur le site de la NASA">Voir l'image PIA07606: Half-Moon sur le site de la NASA.</a></div>
PIA07606: Half-Moon
<h1>PIA07609: Crater Contrast</h1><div class="PIA07609" lang="en" style="width:284px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Rhea's distinctive bright and relatively fresh-rayed crater lies in stark contrast to the large, round basin which sits along the terminator (the boundary between day and night) in this unmagnified view.</p><p>Rhea (1,528 kilometers, or 949 miles across) is Saturn's second-largest moon.</p><p>North on Rhea is up and rotated about 15 degrees to the left. The sunlit terrain shown here is on the moon's leading hemisphere.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 31, 2005, at a distance of approximately 1.6 million kilometers (1 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 52 degrees. The image scale is 10 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</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/PIA07609" onclick="window.open(this.href); return false;" title="Voir l'image PIA07609: Crater Contrast sur le site de la NASA">Voir l'image PIA07609: Crater Contrast sur le site de la NASA.</a></div>
PIA07609: Crater Contrast
<h1>PIA07635: Sleek Rings, Rugged Moon</h1><div class="PIA07635" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Rhea floats below the innermost regions of Saturn's amazing rings. This view of the Saturn-facing hemisphere of Rhea (1,528 kilometers, or 949 miles across) allows a glimpse of the wispy terrain that covers the trailing hemisphere of Rhea.</p></p>(See <a href="/catalog/PIA06575">PIA06575</a>) & <a href="/catalog/PIA06578">PIA06578</a>) for similar views of the wispy terrain.)</p></p>The image was taken in visible light with the Cassini narrow-angle camera on Oct. 9, 2005, at a distance of approximately 1.9 million kilometers (1.2 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 51 degrees. The image scale is 12 kilometers (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">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/PIA07635" onclick="window.open(this.href); return false;" title="Voir l'image PIA07635: Sleek Rings, Rugged Moon sur le site de la NASA">Voir l'image PIA07635: Sleek Rings, Rugged Moon sur le site de la NASA.</a></div>
PIA07635: Sleek Rings, Rugged Moon
<h1>PIA07642: Rhea in Profile</h1><div class="PIA07642" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Gray and barren Rhea drifts beneath Saturn's more colorful rings. Bright wispy markings on the trailing hemisphere of Rhea are just visible curling along the western limb. </p><p>Above the icy moon, Saturn's shadow darkens the ringplane.</p><p>Images taken using red, green and blue spectral filters were combined to create this color image, which approximates what the human eye might see. The images were taken in visible light with the Cassini narrow-angle camera on Oct. 13, 2005, at a distance of approximately 1.7 million kilometers (1 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 100 degrees. North on Rhea is up. The image scale is 10 kilometers (6 miles) per pixel. Rhea is 1,528 kilometers (949 miles) 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 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/PIA07642" onclick="window.open(this.href); return false;" title="Voir l'image PIA07642: Rhea in Profile sur le site de la NASA">Voir l'image PIA07642: Rhea in Profile sur le site de la NASA.</a></div>
PIA07642: Rhea in Profile
<h1>PIA07685: Pulverized Pulchritude (Monochrome)</h1><div class="PIA07685" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This close view of Rhea prominently shows two large impact basins on the ancient and battered moon. The great age of these basins is suggested by the large number of smaller craters that are overprinted within them.</p><p>Ejecta from the bright, relatively young crater seen in <a href="/catalog/PIA07609">PIA07609</a> spreads from the eastern limb. Terrain visible in this view is on the side of Rhea (1,528 kilometers, or 949 miles across) that faces away from Saturn. North on Rhea is up and tilted 30 degrees to the left.</p><p>See <a href="/catalog/PIA07686">PIA07686</a> for a similar enhanced color view.</p><p>The image was taken with the Cassini spacecraft narrow-angle camera on Dec. 23, 2005 using a spectral filter sensitive to wavelengths of infrared light centered at 930 nanometers. The image was acquired at a distance of approximately 341,000 kilometers (212,000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 42 degrees. The 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">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/PIA07685" onclick="window.open(this.href); return false;" title="Voir l'image PIA07685: Pulverized Pulchritude (Monochrome) sur le site de la NASA">Voir l'image PIA07685: Pulverized Pulchritude (Monochrome) sur le site de la NASA.</a></div>
PIA07685: Pulverized Pulchritude (Monochrome)
<h1>PIA07686: Pulverized Pulchritude (Enhanced Color)</h1><div class="PIA07686" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This close view of Rhea prominently shows two large impact basins on the ancient and battered moon. The great age of these basins is suggested by the large number of smaller craters that are overprinted within them.</p><p>Ejecta from the bright, relatively young crater seen in <a href="/catalog/PIA07609">PIA07609</a> spreads from the eastern limb.</p><p>Terrain visible in this view is on the side of Rhea (1,528 kilometers, or 949 miles across) that faces away from Saturn. North on Rhea is up and tilted 30 degrees to the left.</p><p>See <a href="/catalog/PIA07685">PIA07685</a> for a similar monochrome view.</p><p>This enhanced color view was created by combining images taken using filters sensitive to ultraviolet, visible green and infrared light. The images were taken with the Cassini spacecraft narrow-angle camera on Dec. 23, 2005, at a distance of approximately 341,000 kilometers (212,000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 42 degrees. The 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">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/PIA07686" onclick="window.open(this.href); return false;" title="Voir l'image PIA07686: Pulverized Pulchritude (Enhanced Color) sur le site de la NASA">Voir l'image PIA07686: Pulverized Pulchritude (Enhanced Color) sur le site de la NASA.</a></div>
PIA07686: Pulverized Pulchritude (Enhanced Color)
<h1>PIA07689: Cratered Iceball</h1><div class="PIA07689" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Scarred and battered Rhea fills the Cassini spacecraft's view. Notable here is the sharp relief of steep crater walls near the terminator.</p><p>Icy Rhea (1,528 kilometers, or 949 miles across) is Saturn's second-largest moon.</p><p>This view shows terrain on Rhea's trailing hemisphere. North is up and rotated 22 degrees to the left.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Dec. 24, 2005 at a distance of approximately 267,000 kilometers (166,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 59 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">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/PIA07689" onclick="window.open(this.href); return false;" title="Voir l'image PIA07689: Cratered Iceball sur le site de la NASA">Voir l'image PIA07689: Cratered Iceball sur le site de la NASA.</a></div>
PIA07689: Cratered Iceball
<h1>PIA07763: Rhea: Full Moon</h1><div class="PIA07763" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This giant mosaic reveals Saturn's icy moon Rhea in her full, crater-scarred glory.</p><p>This view consists of 21 clear-filter images and is centered at 0.4 degrees south latitude, 171 degrees west longitude.</p><p>The giant Tirawa impact basin is seen above and to the right of center. Tirawa, and another basin to its southwest, are both covered in impact craters, indicating they are quite ancient.</p><p>The bright, approximately 40-kilometer-wide (25-mile) ray crater seen in many Cassini views of Rhea is located on the right side of this mosaic (at 12 degrees south latitude, 111 degrees west longitude). See <a href="/catalog/PIA07764">PIA07764</a> for a close-up view of the eastern portion of the bright, ray crater.</p><p>There are few signs of tectonic activity in this view. However, the wispy streaks on Rhea that were seen at lower resolution by NASA's Voyager and Cassini spacecraft, were beyond the western (left) limb from this perspective. In high-resolution Cassini flyby images of Dione, similar features were identified as fractures caused by extensive tectonism.</p><p>Rhea is Saturn's second-largest moon, at 1,528 kilometers (949 miles) across.</p><p>The images in this mosaic were taken with the Cassini spacecraft narrow-angle camera during a close flyby on Nov. 26, 2005. The images were acquired as Cassini approached the moon at distances ranging from 79,190 to 58,686 kilometers (49,206 to 36,466 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of about 19 degrees. Image scale in the mosaic is 354 meters (1,161 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</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/PIA07763" onclick="window.open(this.href); return false;" title="Voir l'image PIA07763: Rhea: Full Moon sur le site de la NASA">Voir l'image PIA07763: Rhea: Full Moon sur le site de la NASA.</a></div>
PIA07763: Rhea: Full Moon
<h1>PIA07764: Catch that Crater</h1><div class="PIA07764" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>In the nick of time, the Cassini spacecraft snapped this image of the eastern rim of Saturn's moon Rhea's bright, ray crater. The impact event appears to have made a prominent bright splotch on the leading hemisphere of Rhea (see <a href="/catalog/PIA06648">PIA06648</a>). Because Cassini was traveling so fast relative to Rhea as the flyby occurred, the crater would have been out of the camera's field of view in any earlier or later exposure.</p><p>The crater's total diameter is about 50 kilometers (30 miles), but this rim view shows details of terrains both interior to the crater and outside its rim. The prominent bright scarp, left of the center, is the crater wall, and the crater interior is to the left of the scarp. The exterior of the crater (right of the scarp) is characterized by softly undulating topography and gentle swirl-like patterns that formed during the emplacement of the large crater's continuous blanket of ejecta material.</p><p>Numerous small craters conspicuously pepper the larger crater's floor and much of the area immediately outside of it. However, in some places, such as terrain in the top portion of the image and the bright crater wall, the terrain appears remarkably free of the small impacts. The localized "shot pattern" and non-uniform distribution of these small craters indicate that they are most likely secondary impacts -- craters formed from fallback material excavated from a nearby primary impact site. Because they exist both inside and outside the large crater in this image, the source impact of the secondary impacts must have happened more recently than the impact event that formed the large crater in this scene.</p><p>This is one of the highest-resolution images of Rhea's surface obtained during Cassini's very close flyby on Nov. 26, 2005, during which the spacecraft swooped to within 500 kilometers (310 miles) of the large moon. Rhea is 1,528 kilometers (949 miles) across and is Saturn's second largest moon, after planet-sized Titan.</p><p>The clear filter image was acquired with the wide-angle camera at an altitude of 511 kilometers (317 miles) above Rhea. Image scale is about 34 meters (112 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</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/PIA07764" onclick="window.open(this.href); return false;" title="Voir l'image PIA07764: Catch that Crater sur le site de la NASA">Voir l'image PIA07764: Catch that Crater sur le site de la NASA.</a></div>
PIA07764: Catch that Crater
<h1>PIA07765: Craters, Craters Everywhere</h1><div class="PIA07765" lang="en" style="width:580px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Craters within craters cover the scarred face of Saturn's moon Rhea in this oblique, high-resolution view of terrain on the moon's western hemisphere.</p><p>A large, degraded crater lies at the center, filled with rolling mounds and many smaller craters. A couple of linear depressions are visible in the terrain (especially at lower right), possibly marking tectonic faults. The crater is about 90 kilometers-wide (56-miles) and is located at 8.5 degrees south latitude, 154.9 west longitude. The moon's icy regolith, or loose surface material, has likely been pummeled into a fine powder over the eons.</p><p>This is one of the highest-resolution images of Rhea's surface obtained during Cassini's close flyby on Nov. 26, 2005, during which the spacecraft swooped to within 500 kilometers (310 miles) of the large moon. Rhea is 1,528 kilometers (949 miles) across and is Saturn's second largest moon, after planet-sized Titan.</p><p>The clear filter image was acquired with the wide-angle camera at an altitude of 620 kilometers (385 miles) above Rhea. Image scale is about 85 meters (280 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</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/PIA07765" onclick="window.open(this.href); return false;" title="Voir l'image PIA07765: Craters, Craters Everywhere sur le site de la NASA">Voir l'image PIA07765: Craters, Craters Everywhere sur le site de la NASA.</a></div>
PIA07765: Craters, Craters Everywhere
<h1>PIA07770: Rhea Eclipses Dione (Animation)</h1><div class="PIA07770" lang="en" style="width:697px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><a href="/archive/PIA07770.mpg"></a><b><br />Click on the image for<br />Rhea Eclipses Dione Movie</b></p><p>Two crescent moons dance around Saturn as far-off Dione slips behind its sibling moon Rhea. From Cassini's perspective, Rhea's bulk (1,528 kilometers, 949 miles wide) completely covered her smaller celestial companion Dione (1,126 kilometers, 700 miles wide) for about three minutes before the smaller moon re-emerged.</p><p>The images used for this movie sequence were taken over approximately 27 minutes as Cassini stared at Rhea. The images were aligned to keep Rhea close to the center of the scene. Additional frames were inserted among the 38 original Cassini images in order to smooth the appearance of Dione's movement -- a scheme called interpolation. For another eclipse movie showing these two moons, see PIA06199.</p><p>The clear-filter images in this movie were acquired with the Cassini narrow-angle camera on Dec. 5, 2005, from a distance of 2.4 million kilometers (1.5 million miles) from Rhea and 2.7 million kilometers (1.7 million miles) from Dione. Image scale is about 14 kilometers (9 miles) per pixel on Rhea and 16 kilometers (10 miles) per pixel on Dione.</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/PIA07770" onclick="window.open(this.href); return false;" title="Voir l'image PIA07770: Rhea Eclipses Dione (Animation) sur le site de la NASA">Voir l'image PIA07770: Rhea Eclipses Dione (Animation) sur le site de la NASA.</a></div>
PIA07770: Rhea Eclipses Dione (Animation)
<h1>PIA07804: The Silent Spheres</h1><div class="PIA07804" lang="en" style="width:700px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>In a silent orbital ballet, Saturn's crater-covered moon Rhea slips between the moons Mimas and Enceladus. The dark sides of Enceladus (bottom) and Mimas (top) are dimly illuminated by reflected light from Saturn.</p><p>Rhea is 1,528 kilometers (949 miles) across, Mimas is 397 kilometers (247 miles) across, and Enceladus is 505 kilometers (314 miles) across.</p><p>The movie was created using 59 clear-filter images taken over a period of about 40 minutes. The images were acquired by the Cassini spacecraft narrow-angle camera on Jan. 27, 2006, at a mean distance of approximately 3 million kilometers (1.9 million miles) from Rhea, 3.5 million kilometers (2.2 million miles) from Mimas, and 3.7 million kilometers (2.3 million miles) from Enceladus. The image scale is approximately 18 kilometers (11 miles) per pixel on Rhea, 21 kilometers (13 miles) per pixel on Mimas, and 22 kilometers (14 miles) per pixel on Enceladus.</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>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA07804" onclick="window.open(this.href); return false;" title="Voir l'image PIA07804: The Silent Spheres sur le site de la NASA">Voir l'image PIA07804: The Silent Spheres sur le site de la NASA.</a></div>
PIA07804: The Silent Spheres
<h1>PIA08120: Rhea's Wisps in Color</h1><div class="PIA08120" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Bright, wispy markings stretch across a region of darker terrain on Saturn's moon Rhea. In this extreme false-color view, the roughly north-south fractures occur within strips of material (which appear greenish here) that are a different color from the surrounding cratered landscape.</p><p>To create the false-color view, ultraviolet, green and infrared images were combined into a single black and white picture that isolates and maps regional color differences. Most of the large-scale variations in brightness across the surface are removed by this process. This "color map" was then superimposed over a clear-filter image.</p><p>The origin of the color differences is not yet understood, but it may be caused by subtle differences in the surface composition or grain sizes making up the icy soil.</p><p>Wispy markings were seen on the trailing hemispheres of both Rhea and Dione in images taken by NASA's Voyager spacecraft, and were hypothesized by some researchers to be the result of material extruded onto the surface by ice volcanism. Cassini's earlier revelation of the braided fractures on Dione led to speculation that Rhea's wisps might also be created by fractures. </p><p>This view shows terrain on the trailing hemisphere of Rhea (1,528 kilometers, or 949 miles across). North is up. </p><p>The image was taken using the Cassini spacecraft narrow-angle camera on Jan. 17, 2006, at a distance of approximately 245,000 kilometers (152,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 30 degrees. Image scale is 1 kilometer (4,771 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/PIA08120" onclick="window.open(this.href); return false;" title="Voir l'image PIA08120: Rhea's Wisps in Color sur le site de la NASA">Voir l'image PIA08120: Rhea's Wisps in Color sur le site de la NASA.</a></div>
PIA08120: Rhea's Wisps in Color
<h1>PIA08121: Intense Color on Rhea</h1><div class="PIA08121" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This intense false-color view highlights and enhances color variations across the cratered and cracked surface of Saturn's moon Rhea.</p><p>To create the false-color view, ultraviolet, green and infrared images were combined into a single black and white picture that isolates and maps regional color differences. This "color map" was then superposed over a clear-filter image. The origin of the color differences is not yet understood, but it may be caused by subtle differences in the surface composition or grain sizes making up the icy soil.</p><p>This view shows terrain on the trailing hemisphere of Rhea (1,528 kilometers, or 949 miles across). North is up.</p><p>The images were taken using the Cassini spacecraft narrow-angle camera on Jan. 18, 2006, at a distance of approximately 268,000 kilometers (166,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 115 degrees. Image scale is 2 kilometers (1.2 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">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/PIA08121" onclick="window.open(this.href); return false;" title="Voir l'image PIA08121: Intense Color on Rhea sur le site de la NASA">Voir l'image PIA08121: Intense Color on Rhea sur le site de la NASA.</a></div>
PIA08121: Intense Color on Rhea
<h1>PIA08148: Revisiting the Splat</h1><div class="PIA08148" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Rhea shows off her bright, fresh-looking impact crater in this Cassini view taken during a close approach. </p><p>For a high-resolution view of this crater, taken during a much closer encounter, see <a href="/catalog/PIA07764">PIA07764</a>.</p><p>The view is toward the leading hemisphere on Rhea (1,528 kilometers, or 949 miles across). North is up.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 24, 2006 at a distance of approximately 343,000 kilometers (213,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 27 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">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/PIA08148" onclick="window.open(this.href); return false;" title="Voir l'image PIA08148: Revisiting the Splat sur le site de la NASA">Voir l'image PIA08148: Revisiting the Splat sur le site de la NASA.</a></div>
PIA08148: Revisiting the Splat
<h1>PIA08173: The Record of Rhea</h1><div class="PIA08173" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Cassini looks down upon Rhea, whose cratered surface was already ancient before any complex life developed on Earth. The terrain seen here has probably changed little in the past billion years.</p><p>This view shows terrain on the Saturn-facing hemisphere of Rhea (1,528 kilometers, or 949 miles across). North is up.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on March 21, 2006 at a distance of approximately 94,000 kilometers (59,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 109 degrees. Image scale is 558 meters (1,832 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/PIA08173" onclick="window.open(this.href); return false;" title="Voir l'image PIA08173: The Record of Rhea sur le site de la NASA">Voir l'image PIA08173: The Record of Rhea sur le site de la NASA.</a></div>
PIA08173: The Record of Rhea
<h1>PIA08180: Now You See Me…</h1><div class="PIA08180" lang="en" style="width:336px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Enceladus briefly passes behind the crescent of Rhea in these images, which are part of a "mutual event" sequence taken by Cassini. These sequences help scientists refine our understanding of the orbits of Saturn's moons.</p><p>The images were taken one minute apart as smaller Enceladus (505 kilometers, or 314 miles across) darted behind Rhea (1,528 kilometers, or 949 miles across) as seen from the Cassini spacecraft's point of view.</p><p>The images were taken in visible light with the Cassini spacecraft narrow-angle camera on April 14, 2006, at a distance of approximately 3.4 million kilometers (2.1 million miles) from Rhea and 4.1 million kilometers (2.5 million miles) from Enceladus. The image scale is 20 kilometers (13 miles) per pixel on Rhea and 24 kilometers (15 miles) per pixel on Enceladus.</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/PIA08180" onclick="window.open(this.href); return false;" title="Voir l'image PIA08180: Now You See Me… sur le site de la NASA">Voir l'image PIA08180: Now You See Me… sur le site de la NASA.</a></div>
PIA08180: Now You See Me…
<h1>PIA08186: Reminder of Ages Past</h1><div class="PIA08186" lang="en" style="width:434px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Rhea displays a prominent scar in this view from Cassini. A large and ancient impact basin can be seen at upper right. The giant feature occurs within a terrain that appears rugged and which likely is saturated with other smaller craters.</p><p>Rhea is Saturn's second-largest moon at 1,528 kilometers (949 miles) across. This view shows terrain on the moon's trailing hemisphere. North is up.</p><p>The image was taken in polarized ultraviolet light with the Cassini spacecraft narrow-angle camera on April 24, 2006 at a distance of approximately 2 million kilometers (1.2 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 117 degrees. Resolution in the original image was 12 kilometers (7 miles) per pixel. The image has been magnified by a factor of two 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. 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/PIA08186" onclick="window.open(this.href); return false;" title="Voir l'image PIA08186: Reminder of Ages Past sur le site de la NASA">Voir l'image PIA08186: Reminder of Ages Past sur le site de la NASA.</a></div>
PIA08186: Reminder of Ages Past
<h1>PIA08189: Bright Ice Below</h1><div class="PIA08189" lang="en" style="width:726px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Rhea's crater-saturated surface shows a large bright blotch, which was likely created when a geologically recent impact sprayed bright, fresh ice ejecta over the moon's surface.</p><p>The rim of the great Tirawa impact basin can be seen near the top of the image. The giant feature is approximately 360 kilometers (220 miles) across.</p><p>This equatorial view captures Rhea's leading hemisphere. North is up and rotated 40 degrees to the right.</p><p>The image was taken in visible red light with the Cassini spacecraft narrow-angle camera on April 28, 2006 at a distance of approximately 481,000 kilometers (299,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 23 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">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/PIA08189" onclick="window.open(this.href); return false;" title="Voir l'image PIA08189: Bright Ice Below sur le site de la NASA">Voir l'image PIA08189: Bright Ice Below sur le site de la NASA.</a></div>
PIA08189: Bright Ice Below
<h1>PIA08203: Uncovering Rhea</h1><div class="PIA08203" lang="en" style="width:342px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Two Saturnian moons meet in the sky. Dione departs after crossing the face of Rhea for several minutes.</p><p>Dione (1,126 kilometers, or 700 miles across), at right, has a notably smoother-looking surface than Rhea (1,528 kilometers, or 949 miles across), suggesting the former has been modified more recently.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 14, 2006 at a distance of approximately 2.7 million kilometers (1.7 million miles) from Dione and 3.1 million kilometers (1.9 million miles) from Rhea. The Sun-moon-spacecraft, or phase, angle is about 134 degrees on both moons. Image scale is 16 kilometers (10 miles) per pixel on Dione and 18 kilometers (11 miles) per pixel on Rhea.</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/PIA08203" onclick="window.open(this.href); return false;" title="Voir l'image PIA08203: Uncovering Rhea sur le site de la NASA">Voir l'image PIA08203: Uncovering Rhea sur le site de la NASA.</a></div>
PIA08203: Uncovering Rhea
<h1>PIA08208: Ragged Crescent</h1><div class="PIA08208" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Rhea's devastated surface creates a jagged terminator as mountains and crater rims break-up the line between day and night. Terrain on Rhea's night side is dimly lit by reflected light from Saturn.</p><p>The view looks toward the southern hemisphere on the moon's trailing side. North on Rhea (1,528 kilometers, or 949 miles across) is up.</p><p>The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on May 22, 2006 at a distance of approximately 263,000 kilometers (164,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 138 degrees. Image scale is 2 kilometers (about 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">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/PIA08208" onclick="window.open(this.href); return false;" title="Voir l'image PIA08208: Ragged Crescent sur le site de la NASA">Voir l'image PIA08208: Ragged Crescent sur le site de la NASA.</a></div>
PIA08208: Ragged Crescent
<h1>PIA08224: Planetglow</h1><div class="PIA08224" lang="en" style="width:603px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Two frigid moons, Rhea and Enceladus, shine in reflected light from Saturn. In such low light and at great distance, Rhea's cratered surface looks deceptively smooth. Light from the distant Sun creates the bright crescent on each moon and scatters off the icy spray above the south pole of Enceladus.</p><p>Rhea is 1,528 kilometers (949 miles) across, and Enceladus is 505 kilometers (314 miles) across. </p><p>The image background appears generally brighter across its center due to the diffuse E ring, which is created by the jets of material from Enceladus.</p><p>The faint vertical banding in the image is due to "noise" in the spacecraft electronics.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 13, 2006 at a distance of approximately 4.1 million kilometers (2.5 million miles) from Enceladus and 4.5 million kilometers (2.8 million miles) from Rhea. The Sun-Enceladus-spacecraft, or phase, angle is 159 degrees. Image scale is 24 kilometers (15 miles) per pixel on Enceladus and 27 kilometers (17 miles) per pixel on Rhea.</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/PIA08224" onclick="window.open(this.href); return false;" title="Voir l'image PIA08224: Planetglow sur le site de la NASA">Voir l'image PIA08224: Planetglow sur le site de la NASA.</a></div>
PIA08224: Planetglow
<h1>PIA08229: Enceladus Approaches</h1><div class="PIA08229" lang="en" style="width:518px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Rhea and Enceladus shared the sky just before the smaller moon passed behind its larger, cratered sibling.</p><p>This image is part of a "mutual event" series in which one moon passes close to or in front of another. These sequences help scientists refine the orbits of Saturn's moons.</p><p>Cratered Rhea is 1,528 kilometers (949 miles) across and presumed to be geologically dead. While much smaller, Enceladus (505 kilometers, or 314 miles across) is geologically active today.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on July 4, 2006 at a distance of approximately 1.4 million kilometers (800,000 miles) from Rhea and 1.9 million kilometers (1.2 million miles) from Enceladus. The view was obtained at a Sun-moon-spacecraft, or phase, angle of about 142 degrees relative to both moons. Image scale is 8 kilometers (5 miles) per pixel on Rhea and 11 kilometers (7 miles) on Enceladus.</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/PIA08229" onclick="window.open(this.href); return false;" title="Voir l'image PIA08229: Enceladus Approaches sur le site de la NASA">Voir l'image PIA08229: Enceladus Approaches sur le site de la NASA.</a></div>
PIA08229: Enceladus Approaches
<h1>PIA08237: Rhea Releases Enceladus</h1><div class="PIA08237" lang="en" style="width:404px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Two slim crescents smile toward the Cassini spacecraft following an occultation event.</p><p>Taken only five minutes after Enceladus (505 kilometers, or 314 miles across) first approached the limb of Rhea (1,528 kilometers, or 949 miles across), this view shows the bright little moon emerging from behind the larger moon's crescent. (See <a href="/catalog/PIA08229">PIA08229</a> for the earlier view.)</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on July 4, 2006 at a distance of approximately 1.4 million kilometers (800,000 miles) from Rhea and 1.9 million kilometers (1.2 million miles) from Enceladus. The view was obtained at a Sun-moon-spacecraft, or phase, angle of about 142 degrees relative to both moons. Image scale is 8 kilometers (5 miles) per pixel on Rhea and 11 kilometers (7 miles) on Enceladus.</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/PIA08237" onclick="window.open(this.href); return false;" title="Voir l'image PIA08237: Rhea Releases Enceladus sur le site de la NASA">Voir l'image PIA08237: Rhea Releases Enceladus sur le site de la NASA.</a></div>
PIA08237: Rhea Releases Enceladus
<h1>PIA08239: Coy Rhea</h1><div class="PIA08239" lang="en" style="width:751px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The rings cannot hide the ragged, icy crescent of Rhea, here imaged in color by the Cassini spacecraft. The second-largest moon of Saturn shines brightly through gaps in the rings.</p><p>Rhea (1,528 kilometers, or 949 miles across) lies beyond the dim, unlit side of the rings. A diffuse clump of material lies in the F ring, on the side nearest to Cassini.</p><p>Images taken using red, green and blue spectral filters were combined to create this natural color view, which approximates the scene as it might appear to human eyes. The view was acquired with the Cassini spacecraft narrow-angle camera on July 1, 2006 at a distance of approximately 1.2 million kilometers (700,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 118 degrees. 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">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/PIA08239" onclick="window.open(this.href); return false;" title="Voir l'image PIA08239: Coy Rhea sur le site de la NASA">Voir l'image PIA08239: Coy Rhea sur le site de la NASA.</a></div>
PIA08239: Coy Rhea