Galerie de photos de Rhéa, satellite de la planète Saturne

<h1>PIA01372: Saturn's satellite Rhea</h1><div class="PIA01372" lang="en" style="width:200px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">Bright streaks and blotches are visible against a darker back-ground on the surface of Saturn's satellite Rhea, seen in this Voyager 1 image taken Nov. 11, 1980 from a range of 1,925,000 kilometers (1,196,000 miles). Even the dark areas, thought to be water frost and ice, are fairly bright with about 50 percent reflectance. The bright streaks may be related to impacts by objects that throw out pulverized ice grains from beneath the ice-covered surface. Some of the bright streaks are not straight but have a curved appearance similar to the grooved, icy terrain on Jupiter's satellite Ganymede seen in Voyager photographs taken at this resolution. Scientists do knot yet know if a satellite of Rhea's size (approximately 1,500 kilometers or 900 miles in diameter) can have an active thermal history like Ganymede's, but higher resolution photographs taken by Voyager should reveal clues to its history. The Voyager Project is managed by the Jet Propulsion Laboratory for NASA.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA01372" onclick="window.open(this.href); return false;" title="Voir l'image PIA01372: Saturn's satellite Rhea sur le site de la NASA">Voir l'image PIA01372: Saturn's satellite Rhea sur le site de la NASA.</a></div>
PIA01372: Saturn's satellite Rhea
<h1>PIA02240: Saturn's moon Rhea</h1><div class="PIA02240" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">NASA's Voyager 1 took this high resolution color image of Rhea just before the spacecraft's closest approach to the Saturnian moon on Nov. 12, 1980 from a range of 128,000 kilometers (79,500 miles). The area shown is one of the most heavily cratered on Rhea, and indicates an ancient surface dating back to the period immediately following the formation of the planets 4.5 billion years ago. The photograph shows surface features about 2.5 kilometers (1.5 miles) in diameter, similar to a view of Earth's Moon through a telescope. Other areas of Rhea's surface are deficient in the very large (100 kilometers or 62 miles or larger) craters, indicating a change in the nature of the impacting bodies and an early period of surface activity. White areas on the edges of several of the craters in the upper right corner are probably fresh ice exposed on steep slopes or possibly deposited by volatiles leaking from fractured regions. The Voyager Project is managed for NASA by the Jet Propulsion Laboratory, Pasadena, California.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02240" onclick="window.open(this.href); return false;" title="Voir l'image PIA02240: Saturn's moon Rhea sur le site de la NASA">Voir l'image PIA02240: Saturn's moon Rhea sur le site de la NASA.</a></div>
PIA02240: Saturn's moon Rhea
<h1>PIA02264: Rhea</h1><div class="PIA02264" lang="en" style="width:551px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">Broad areas of light and dark material seen in this enhanced Voyager 1 picture of Saturn's satellite Rhea suggest varying amounts of fresh ice on the moon's surface. A few small bright spots are visible and are similar in appearance to small fresh impact craters seen in Voyager images of the Galilean satellites of Jupiter taken at this resolution. The photograph, taken Nov. 10, 1980 at a range of 2.7 million kilometers (1.6 million miles), shows features about 50 kilometers (30 miles) in scale. Near the terminator (lower right) are several features which indicate topographic relief. The two circular features may be large impact craters perhaps a hundred kilometers (60 miles) across. (The extreme brightness of the southern (lower left) region is probably not real and is a result of image processing.) Rhea is one of the larger of Saturn's inner satellites with a diameter of about 1,500 kilometers (900 miles) and is known to be covered at least partially with water frost. It may be mostly icy in nature. The Voyager Project is managed for NASA by the Jet Propulsion Laboratory, Pasadena, Calif.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02264" onclick="window.open(this.href); return false;" title="Voir l'image PIA02264: Rhea sur le site de la NASA">Voir l'image PIA02264: Rhea sur le site de la NASA.</a></div>
PIA02264: Rhea
<h1>PIA02270: Rhea - multiple impact craters</h1><div class="PIA02270" lang="en" style="width:796px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">Multiple impact craters are seen on the ancient surface of Saturn's moon Rhea in this picture taken by Voyager 1 on Nov. 12, 1980 at a range of 73,000 kilometers (45,000 miles). The craters closely resemble those on Mercury and Earth's Moon. Many of the craters have central peaks formed by rebound of the floor during the explosive formation of the crater. The craters are old and degraded by later impacts. Crater diameters seen are as large as approximately 75 kilometers (45 miles). Many have sharp rims and appear relatively fresh while others are very shallow and have subdued rims, indicative of their antiquity. The Voyager Project is managed for NASA by the Jet Propulsion Laboratory, Pasadena, Calif.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02270" onclick="window.open(this.href); return false;" title="Voir l'image PIA02270: Rhea - multiple impact craters sur le site de la NASA">Voir l'image PIA02270: Rhea - multiple impact craters sur le site de la NASA.</a></div>
PIA02270: Rhea - multiple impact craters
<h1>PIA02273: Rhea - icy cratered surface</h1><div class="PIA02273" lang="en" style="width:396px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">The icy, cratered surface of Saturn's moon Rhea is seen in this image taken by Voyager 1 on Nov. 12, 1980, at a range of 85,000 kilometers (52,800 miles) as the spacecraft passed over the satellite's north pole. The heavily cratered surface attests to the satellite's ancient age. The largest craters, 50 to 100 kilometers (30 to 60 miles) across and several kilometers deep, are freshly preserved in Rhea's icy crust. The craters and landscape resemble those on the Moon and Mercury, and are unlike the flattened crater forms that have collapsed in the soft icy crusts of the Jovian moons Callisto, Ganymede and Europa. Scientists believe that Rhea (which is just 1,600 kilometers or 995 miles in diameter, compared to the 5,500-kilometer or 3,400-mile diameter of Ganymede) froze and became rigid, behaving like a rocky surface, very early in its history. The Voyager project is managed for NASA by the Jet Propulsion Laboratory, Pasadena, Calif.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02273" onclick="window.open(this.href); return false;" title="Voir l'image PIA02273: Rhea - icy cratered surface sur le site de la NASA">Voir l'image PIA02273: Rhea - icy cratered surface sur le site de la NASA.</a></div>
PIA02273: Rhea - icy cratered surface
<h1>PIA05419: Crescent Rhea</h1><div class="PIA05419" lang="en" style="width:497px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The first artificial satellite in the Saturn system, the Cassini spacecraft, returned images of the natural moons following a successful insertion into orbit. This is an unmagnified view of the moon Rhea. </p><p>With a diameter of 1,528 kilometers (950 miles) across, Rhea is Saturn's second largest moon. The Voyager spacecraft found that like Dione, Rhea has one of its hemispheres covered with bright, wispy streaks which may be water frost.</p><p>This view shows a heavily cratered surface, and thus it is most likely ancient. Many of the craters visible here have central peaks. Cassini soon will look for clues to help unlock the moon's geologic history. The spacecraft is slated to fly by Rhea at a distance of only 500 kilometers (311 miles) on Nov. 26, 2005. </p><p>The image was taken in visible light with the Cassini spacecraft narrow angle camera on July 2, 2004, from a distance of about 990,000 kilometers (615,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase angle of about 109 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 Cassini-Huygens mission for NASA's Office of Space Science, Washington, D.C. The Cassini orbiter and its two onboard cameras, were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA05419" onclick="window.open(this.href); return false;" title="Voir l'image PIA05419: Crescent Rhea sur le site de la NASA">Voir l'image PIA05419: Crescent Rhea sur le site de la NASA.</a></div>
PIA05419: Crescent Rhea
<h1>PIA05431: Receding Rhea</h1><div class="PIA05431" lang="en" style="width:348px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This view of Saturn's icy moon Rhea shows hints of its heavily cratered surface, including a bright feature near the terminator (day-night boundary). Cassini was, at the time, speeding away from the Saturn system on its initial long, looping orbit.</p><p>The image was taken in visible light with the Cassini spacecraft narrow angle camera on July 15, 2004, from a distance of about 5.1 million kilometers (3.2 million miles) from Rhea. The Sun-Rhea-spacecraft, or phase angle of the image is 90 degrees. The image scale is 31 kilometers (19 miles) per pixel. The image has been 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 Cassini-Huygens mission for NASA's Office of Space Science, Washington, D.C. The Cassini orbiter and its two onboard cameras, were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA05431" onclick="window.open(this.href); return false;" title="Voir l'image PIA05431: Receding Rhea sur le site de la NASA">Voir l'image PIA05431: Receding Rhea sur le site de la NASA.</a></div>
PIA05431: Receding Rhea
<h1>PIA06463: Distant Rhea</h1><div class="PIA06463" lang="en" style="width:464px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Cassini caught a hint of Rhea's heavily cratered surface as it sped rapidly away from the moon on its first orbit of Saturn. There is a noticeable brightening near the left limb of the icy moon. Cassini will have its first flyby of Rhea in November 2005.</p><p>The image was taken in visible light with the Cassini spacecraft narrow angle camera on July 20, 2004, from a distance of 5.9 million kilometers (3.6 million miles) from Rhea, and at a Sun-Rhea-spacecraft, or phase angle of 91 degrees. The image scale is 35 kilometers (22 miles) per pixel. The image has been magnified by a factor of four 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 Cassini-Huygens mission for NASA's Office of Space Science, Washington, D.C. The Cassini orbiter and its two onboard cameras, were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06463" onclick="window.open(this.href); return false;" title="Voir l'image PIA06463: Distant Rhea sur le site de la NASA">Voir l'image PIA06463: Distant Rhea sur le site de la NASA.</a></div>
PIA06463: Distant Rhea
<h1>PIA06480: Far Out Rhea</h1><div class="PIA06480" lang="en" style="width:380px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Cassini caught this glimpse of Saturn's second largest moon, 1,528 kilometer (949 mile) wide Rhea on Aug. 16, 2004. Notable in the image is a brightening near the terminator.</p><p>The image was taken in visible light with the Cassini spacecraft narrow angle camera at a distance of 8.5 million kilometers (5.3 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 86 degrees. The image scale is 51 kilometers (32 miles) per pixel. The image has been enhanced and magnified by a factor of four 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 Cassini-Huygens mission for NASA's Office of Space Science, Washington, D.C. The Cassini orbiter and its two onboard cameras, were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06480" onclick="window.open(this.href); return false;" title="Voir l'image PIA06480: Far Out Rhea sur le site de la NASA">Voir l'image PIA06480: Far Out Rhea sur le site de la NASA.</a></div>
PIA06480: Far Out Rhea
<h1>PIA06490: Second Largest Moon</h1><div class="PIA06490" lang="en" style="width:402px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The icy moon Rhea, Saturn's second largest satellite, hangs before Cassini in this narrow angle camera image, showing just a hint of its crater-pocked surface. Rhea is 1,528 kilometers (950 miles) across.</p><p>The image was taken in visible light on Aug. 25, 2004, at a distance of 8.8 million kilometers (5.5 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 84 degrees. The image scale is 53 kilometers (33 miles) per pixel. The image has been magnified by a factor of four 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 Cassini-Huygens mission for NASA's Office of Space Science, Washington, D.C. The Cassini orbiter and its two onboard cameras, were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06490" onclick="window.open(this.href); return false;" title="Voir l'image PIA06490: Second Largest Moon sur le site de la NASA">Voir l'image PIA06490: Second Largest Moon sur le site de la NASA.</a></div>
PIA06490: Second Largest Moon
<h1>PIA06516: Rhea's Battered Surface</h1><div class="PIA06516" lang="en" style="width:725px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This view of Saturn's second-largest moon, Rhea (1,528 kilometers, or 949 miles, across), shows some of the large craters that cover its surface. There is a bright feature near the moon's right limb, possibly a large, rayed crater or bright icy material exposed by internal processes.</p><p>The image was taken in visible light with the Cassini spacecraft narrow angle camera on Sept. 26, 2004, at a distance of 7.1 million kilometers (4.4 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 75 degrees. The image scale is 43 kilometers (27 miles) per pixel. The image has been magnified by a factor of four 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 Cassini-Huygens 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>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06516" onclick="window.open(this.href); return false;" title="Voir l'image PIA06516: Rhea's Battered Surface sur le site de la NASA">Voir l'image PIA06516: Rhea's Battered Surface sur le site de la NASA.</a></div>
PIA06516: Rhea's Battered Surface
<h1>PIA06525: A Real Shiner</h1><div class="PIA06525" 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 shows off the moon equivalent of a black eye -- a bright, rayed crater near its eastern limb.</p><p>Rhea is about half the size of Earth's moon. At 1,528 kilometers (949 miles) across, it is the second-largest moon orbiting Saturn. </p><p>The image was taken in visible light with the Cassini spacecraft narrow angle camera on Oct. 24, 2004, at a distance of about 1.7 million kilometers (1 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 40 degrees. The image scale is approximately 10 kilometers (6 miles) per pixel. Cassini will image this hemisphere of Rhea again in mid-January 2005, just after the Huygens probe landing on Titan - with approximately 1-kilometer (0.6-mile) resolution.</p><p>The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Cassini-Huygens mission for NASA's Office of Space Science, Washington, D.C. The Cassini orbiter and its two onboard cameras, were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06525" onclick="window.open(this.href); return false;" title="Voir l'image PIA06525: A Real Shiner sur le site de la NASA">Voir l'image PIA06525: A Real Shiner sur le site de la NASA.</a></div>
PIA06525: A Real Shiner
<h1>PIA06553: Fresh Crater?</h1><div class="PIA06553" lang="en" style="width:418px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Rhea has been heavily bombarded by impacts during its history. In this Cassini image the moon displays what may be a relatively fresh, bright, rayed crater near Rhea's eastern limb. Rhea is 1,528 kilometers (949 miles) across.</p><p>This view is centered on the side of Rhea that faces away from Saturn as the moon orbits. The image was taken in visible light with the Cassini spacecraft narrow angle camera on Nov. 10, 2004, at a distance of 3.6 million kilometers (2.2 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 86 degrees. North is up. The image scale is 21 kilometers (13 miles) per pixel. The image has been magnified by a factor of two and contrast enhanced to aid visibility of surface features. </p><p>The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06553" onclick="window.open(this.href); return false;" title="Voir l'image PIA06553: Fresh Crater? sur le site de la NASA">Voir l'image PIA06553: Fresh Crater? sur le site de la NASA.</a></div>
PIA06553: Fresh Crater?
<h1>PIA06555: Rhea's Ancient Surface</h1><div class="PIA06555" lang="en" style="width:391px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The sunlight angle in this sharp view of Saturn's second-largest moon, Rhea, highlights the moon's crater-strewn surface. Cassini will fly past Rhea on Nov. 26, 2005, at a distance of only 500 kilometers (311 miles) and will obtain very high resolution images at that time. Rhea's diameter is 1,528 kilometers (949 miles).</p><p>This view shows mainly the hemisphere of Rhea that faces away from Saturn. The image was taken in visible light with the Cassini spacecraft narrow angle camera on Nov. 1, 2004, at a distance of 1.6 million kilometers (994,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 102 degrees. North is up. The image scale is about 10 kilometers (6 miles) per pixel. The image has been slightly contrast enhanced to aid visibility of surface features. </p><p>The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06555" onclick="window.open(this.href); return false;" title="Voir l'image PIA06555: Rhea's Ancient Surface sur le site de la NASA">Voir l'image PIA06555: Rhea's Ancient Surface sur le site de la NASA.</a></div>
PIA06555: Rhea's Ancient Surface
<h1>PIA06559: Mottled Rhea</h1><div class="PIA06559" lang="en" style="width:504px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Impact-battered Rhea exhibits a mottled appearance in this image from the Cassini spacecraft. On an ancient surface such as this, large impact basins are often peppered with many smaller craters. The image shows principally the trailing hemisphere of this icy moon, Saturn's second largest. Rhea's diameter is 1,528 kilometers (949 miles).</p><p>The image was taken in visible light with the Cassini spacecraft narrow angle camera on Dec. 9, 2004, at a distance of 2.3 million kilometers (1.4 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 60 degrees. The image scale is about 14 kilometers (9 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 team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06559" onclick="window.open(this.href); return false;" title="Voir l'image PIA06559: Mottled Rhea sur le site de la NASA">Voir l'image PIA06559: Mottled Rhea sur le site de la NASA.</a></div>
PIA06559: Mottled Rhea
<h1>PIA06560: Ancient Impacts</h1><div class="PIA06560" lang="en" style="width:478px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Features on the surface of Saturn's moon Rhea reveal clues about the moon's history. In this Cassini image, two large impact basins near center and bottom exhibit central peaks. The image shows largely the trailing hemisphere of Rhea. At right, some of the wispy markings that cover the moon's trailing hemisphere are visible. Rhea's diameter is 1,528 kilometers (949 miles) across.</p><p>The image was taken in visible light with the Cassini spacecraft narrow angle camera on Dec. 9, 2004, at a distance of 2.5 million kilometers (1.6 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 62 degrees. The image scale is about 15 kilometers (9 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 team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information, about the Cassini-Huygens mission visit, <a href="http://saturn.jpl.nasa.gov/">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org/">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06560" onclick="window.open(this.href); return false;" title="Voir l'image PIA06560: Ancient Impacts sur le site de la NASA">Voir l'image PIA06560: Ancient Impacts sur le site de la NASA.</a></div>
PIA06560: Ancient Impacts
<h1>PIA06564: Rhea and Her Craters</h1><div class="PIA06564" lang="en" style="width:544px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This Cassini image shows predominantly the impact-scarred leading hemisphere of Saturn's icy moon Rhea (1,528 kilometers, or 949 miles across). </p><p>The image was taken in visible light with the Cassini spacecraft narrow angle camera on Dec. 12, 2004, at a distance of 2 million kilometers (1.2 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 30 degrees. The image scale is about 12 kilometers (7.5 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 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 images visit the Cassini imaging team home page <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06564" onclick="window.open(this.href); return false;" title="Voir l'image PIA06564: Rhea and Her Craters sur le site de la NASA">Voir l'image PIA06564: Rhea and Her Craters sur le site de la NASA.</a></div>
PIA06564: Rhea and Her Craters
<h1>PIA06575: Impact Central</h1><div class="PIA06575" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This view of the trailing hemisphere of Saturn's moon Rhea shows the region's bright wispy markings, but also shows off the moon's craters in great detail. Of particular interest to imaging scientists is the distribution and orientation of the many craters with polygonal rims. These are craters with rough, angular shapes, rather than smooth, circular ones. Rhea is 1,528 kilometers (949 miles) across.</p><p>This image was taken in visible light with the Cassini spacecraft narrow angle camera on Jan. 16, 2005, at a distance of approximately 500,000 kilometers (311,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 35 degrees. (<a href="/catalog/PIA06578">PIA06578</a> is a true color version of this image.) Resolution in the original image was about 3 kilometers (2 miles) per pixel. The image has been rotated so that north on Rhea is up. Contrast was enhanced and the image was 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> and the Cassini imaging team home page, <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06575" onclick="window.open(this.href); return false;" title="Voir l'image PIA06575: Impact Central sur le site de la NASA">Voir l'image PIA06575: Impact Central sur le site de la NASA.</a></div>
PIA06575: Impact Central
<h1>PIA06578: Rhea in Natural Color</h1><div class="PIA06578" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The trailing hemisphere of Saturn's moon Rhea seen here in natural color, displays bright, wispy terrain that is similar in appearance to that of Dione, another one of Saturn's moon. At this distance however, the exact nature of these wispy features remains tantalizingly out of the reach of Cassini's cameras.</p><p>At this resolution, the wispy terrain on Rhea looks like a thin coating painted onto the moon's surface. Cassini images from December 2004 (see <a href="/catalog/PIA06163">PIA06163</a>) revealed that, when seen at moderate resolution, Dione's wispy terrain is comprised of many long, narrow and braided fractures.</p><p>Images taken using red, green and blue spectral filters were combined to create this natural color view. The images were acquired with the Cassini spacecraft narrow angle camera on Jan. 16, 2005, at a distance of approximately 496,500 kilometers (308,600 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 35 degrees. Resolution in the original image was about 3 kilometers (2 miles) per pixel. The image has been rotated so that north on Rhea is up. Contrast was enhanced and the image was 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> and the Cassini imaging team home page, <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06578" onclick="window.open(this.href); return false;" title="Voir l'image PIA06578: Rhea in Natural Color sur le site de la NASA">Voir l'image PIA06578: Rhea in Natural Color sur le site de la NASA.</a></div>
PIA06578: Rhea in Natural Color
<h1>PIA06599: Rhea's Crescent</h1><div class="PIA06599" lang="en" style="width:346px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Two large craters lie along the boundary between day and night on Saturn's moon Rhea. The bright spots in the middle of each crater may be prominent central peaks. Rhea is 1,528 kilometers (949 miles) across.</p><p>This view shows principally the trailing hemisphere on Rhea. The image has been rotated so that north on Rhea is up.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Jan. 19, 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 121 degrees. Resolution in the original image was 11 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> and the Cassini imaging team home page, <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06599" onclick="window.open(this.href); return false;" title="Voir l'image PIA06599: Rhea's Crescent sur le site de la NASA">Voir l'image PIA06599: Rhea's Crescent sur le site de la NASA.</a></div>
PIA06599: Rhea's Crescent
<h1>PIA06609: Color on Rhea?</h1><div class="PIA06609" lang="en" style="width:494px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This false-color picture of Saturn's moon Rhea from Cassini enhances slight differences in natural color across the moon's face. The extreme north and south latitudes have a notable difference in hue compared to the mid-latitudes.</p><p>This view of Rhea is a composite of images taken using filters sensitive to green (centered at 568 nanometers) and infrared light (two infrared filters, centered at 752 and 930 nanometers) and has been processed to accentuate subtle color differences.</p><p>The image was taken with the Cassini spacecraft narrow angle-camera on Feb. 18, 2005, at a distance of approximately 890,000 kilometers (553,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 116 degrees. The 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 team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission, visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06609" onclick="window.open(this.href); return false;" title="Voir l'image PIA06609: Color on Rhea? sur le site de la NASA">Voir l'image PIA06609: Color on Rhea? sur le site de la NASA.</a></div>
PIA06609: Color on Rhea?
<h1>PIA06620: Rhea and Enceladus</h1><div class="PIA06620" lang="en" style="width:794px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Though much farther away from Cassini when the spacecraft acquired this image, Saturn's second-largest moon Rhea still dwarfs the brightest icy moon Enceladus in this scene. Rhea is 1,528 kilometers (949 miles) across. Enceladus is 505 kilometers (314 miles) across.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 21, 2005, at a distance of approximately 2 million kilometers (1.3 million miles) from Enceladus and 2.5 million kilometers (1.6 million miles) from Rhea. The image scale is 12 kilometers (7 miles) per pixel on Enceladus, and 15 kilometers (9 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 team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission, visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06620" onclick="window.open(this.href); return false;" title="Voir l'image PIA06620: Rhea and Enceladus sur le site de la NASA">Voir l'image PIA06620: Rhea and Enceladus sur le site de la NASA.</a></div>
PIA06620: Rhea and Enceladus
<h1>PIA06630: Dark Patch</h1><div class="PIA06630" lang="en" style="width:654px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The ancient and battered surface of Saturn's moon Rhea shows a notable dark swath of territory near the eastern limb in this image from Cassini.</p><p>This view shows principally the Saturn-facing hemisphere on Rhea (1,528 kilometers, or 949 miles across). North is up and tilted 40 degrees to the right.</p><p>The image was taken with the Cassini spacecraft narrow-angle camera on March 7, 2005, through a filter sensitive to wavelengths of ultraviolet light centered at 338 nanometers. The view was acquired at a distance of approximately 1.8 million kilometers (1.1 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 30 degrees. Resolution in the original image was 10 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> and the Cassini imaging team home page, <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06630" onclick="window.open(this.href); return false;" title="Voir l'image PIA06630: Dark Patch sur le site de la NASA">Voir l'image PIA06630: Dark Patch sur le site de la NASA.</a></div>
PIA06630: Dark Patch
<h1>PIA06637: Rhea's Relief</h1><div class="PIA06637" lang="en" style="width:664px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This Cassini image shows the cratered surface of Saturn's moon Rhea, with impact craters near the terminator thrown into sharp relief. Rhea is Saturn's second-largest moon, at 1,528 kilometers (949 miles across).</p><p>This view shows the leading hemisphere on Rhea. North is up and tilted 23 degrees to the left.</p><p>The image was taken with the Cassini spacecraft narrow-angle camera on March 12, 2005, through a filter sensitive to wavelengths of ultraviolet light centered at 338 nanometers. The view was obtained at a distance of approximately 1.5 million kilometers (950,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 70 degrees. Resolution in the image is 9 kilometers (6 miles) per pixel. </p><p>The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission, visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06637" onclick="window.open(this.href); return false;" title="Voir l'image PIA06637: Rhea's Relief sur le site de la NASA">Voir l'image PIA06637: Rhea's Relief sur le site de la NASA.</a></div>
PIA06637: Rhea's Relief
<h1>PIA06641: Big Basin</h1><div class="PIA06641" lang="en" style="width:536px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The large Tirawa impact basin on Saturn's moon Rhea is visible at the two o'clock position in this Cassini image. Rhea is 1,528 kilometers (949 miles) across.</p><p>This view shows principally the trailing hemisphere on Rhea, and is centered on the moon's equator. North is up and tilted 25 degrees to the left.</p><p>The image was taken with the Cassini spacecraft narrow-angle camera on March 13, 2005, through a filter sensitive to wavelengths of ultraviolet light centered at 338 nanometers. The image was obtained at a distance of approximately 1.7 million kilometers (1.1 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 90 degrees. Resolution in the original image was 10 kilometers (6 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> and the Cassini imaging team home page, <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA06641" onclick="window.open(this.href); return false;" title="Voir l'image PIA06641: Big Basin sur le site de la NASA">Voir l'image PIA06641: Big Basin sur le site de la NASA.</a></div>
PIA06641: Big Basin
<h1>PIA06648: Great White Splat</h1><div class="PIA06648" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Looking closely at Saturn's moon Rhea during a somewhat distant flyby, Cassini provides this view of what appears to be a bright, rayed and therefore relatively young crater. This crater was also observed by Cassini at much lower resolution in the fall of 2004 and in spring of 2005. Rhea is 1,528 kilometers (949 miles) across.</p><p>For comparison, viewing the same crater near the terminator (the line between day and night) would highlight the crater's topography (vertical relief), compared to its brightness, which is highlighted in this view where the Sun is at a higher angle.</p><p>North on Rhea is up and rotated about 15 degrees to the left. This view shows principally the leading hemisphere on Rhea.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on April 14, 2005, at a distance of approximately 247,000 kilometers (153,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase angle of 70 degrees. Resolution in the image 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 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/PIA06648" onclick="window.open(this.href); return false;" title="Voir l'image PIA06648: Great White Splat sur le site de la NASA">Voir l'image PIA06648: Great White Splat sur le site de la NASA.</a></div>
PIA06648: Great White Splat
<h1>PIA07514: Rhea's Bright Splat</h1><div class="PIA07514" lang="en" style="width:279px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Saturn's moon Rhea displays one of its more prominent features here: a bright, rayed crater which was seen at much higher resolution in an image taken two weeks earlier. Rhea is 1,528 kilometers (949 miles) across.</p><p>North on Rhea is up and rotated about 65 degrees to the left. This view shows principally the anti-Saturn hemisphere on Rhea.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on April 27, 2005, at a distance of approximately 2 million kilometers (1.3 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 42 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 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/PIA07514" onclick="window.open(this.href); return false;" title="Voir l'image PIA07514: Rhea's Bright Splat sur le site de la NASA">Voir l'image PIA07514: Rhea's Bright Splat sur le site de la NASA.</a></div>
PIA07514: Rhea's Bright Splat
<h1>PIA07517: Sun-Drenched Rhea</h1><div class="PIA07517" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Saturn's brightly sunlit moon Rhea commands the foreground in this image from Cassini. The planet's splendid rings are discernible in the background. Rhea is 1,528 kilometers (949 miles) across.</p><p>The spacecraft was just above the ringplane when it acquired this image, and thus captured the darkened appearance of the dense B ring when viewed with sunlight filtered through the rings. From this perspective, bright areas in the rings are regions of low density, containing very small particles that effectively scatter light toward Cassini.</p><p>North on Rhea is up and rotated about 25 degrees to the left. This view shows principally the anti-Saturn hemisphere on Rhea. The right side of Rhea is overexposed.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 18, 2005, at a distance of approximately 540,000 kilometers (340,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 110 degrees. The 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 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/PIA07517" onclick="window.open(this.href); return false;" title="Voir l'image PIA07517: Sun-Drenched Rhea sur le site de la NASA">Voir l'image PIA07517: Sun-Drenched Rhea sur le site de la NASA.</a></div>
PIA07517: Sun-Drenched Rhea
<h1>PIA07527: Rhea's Memory</h1><div class="PIA07527" lang="en" style="width:310px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The story of the solar system is written upon the faces of its many worlds, such as Saturn's icy moon Rhea, seen here in an image from Cassini. The moon's many impact craters attest to its violent beginnings and more than four billion years of subsequent history. Rhea is 1,528 kilometers (949 miles) across.</p><p>Most moons in the outer solar system are icy, in contrast to the rocky inner planets and Earth's moon. When the planets and their moons first formed around our Sun, conditions were cold enough at Saturn's distance that ices could condense to form solid bodies like Rhea. Since its formation, Rhea has been battered by the leftover debris of planet building, although at a much lower rate for the past 3.8 billion years or so.</p><p>North on Rhea is up and rotated about 20 degrees to the left. This view shows principally the leading hemisphere on Rhea.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 5, 2005, at a distance of approximately 1.4 million kilometers (900,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 78 degrees. The image scale is 9 kilometers (6 miles) per pixel. </p><p>The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging 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/PIA07527" onclick="window.open(this.href); return false;" title="Voir l'image PIA07527: Rhea's Memory sur le site de la NASA">Voir l'image PIA07527: Rhea's Memory sur le site de la NASA.</a></div>
PIA07527: Rhea's Memory
<h1>PIA07539: Diversity of Impacts</h1><div class="PIA07539" lang="en" style="width:518px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Saturn's moon Rhea displays two large impact features here, along the terminator (the boundary between day and night), plus a superb rayed crater to the east. Rhea is 1,528 kilometers (949 miles) across.</p><p>The northern basin, named Tirawa, was discovered in Voyager images. This ancient impact site is approximately 360 kilometers (220 miles) across. Another, perhaps larger basin sits to the south of Tirawa and is partly in shadow.</p><p>This view shows principally the leading hemisphere on Rhea; north is up and rotated about 10 degrees to the left.</p><p>The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 2, 2005, at a distance of approximately 1.8 million kilometers (1.1 million miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 47 degrees. Resolution in the original image was 11 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/PIA07539" onclick="window.open(this.href); return false;" title="Voir l'image PIA07539: Diversity of Impacts sur le site de la NASA">Voir l'image PIA07539: Diversity of Impacts sur le site de la NASA.</a></div>
PIA07539: Diversity of Impacts