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Galerie de photos de Europe, satellite galiléen de la planète Jupiter

Jupiter_Europe_2.jpg
Jupiter_Europe_2.jpg
Jupiter_Europe_3.jpg
Jupiter_Europe_3.jpg
<h1>PIA00016:  Europa - Full Disk</h1><div class="PIA00016" lang="en" style="width:400px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This picture of Europa, the smallest Galilean satellite, was taken in the afternoon of March 4, 1979, from a distance of about 2 million kilometers (1.2 million miles) by Voyager 1. This face of Europa is centered at about the 300` meridian. The resolution of this picture of Europa is about the best that will be obtained by Voyager 1, but the second spacecraft will take much clearer photographs of this satellite in July. The bright areas are probably ice deposits while the darkened areas may be the rocky surface or areas with a more patchy distribution of ice. The most unusual features are the systems of long linear structures which cross the surface in various directions. Some of these linear structures are over a thousand kilometers long and about 2 or 3 hundred kilometers wide. They may be fractures or faults which have disrupted the surface. JPL manages and controls the Voyager Project for NASA's Office of Space Science.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00016" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00016:  Europa - Full Disk	  sur le site de la NASA">Voir l'image 	 PIA00016:  Europa - Full Disk	  sur le site de la NASA.</a></div>
PIA00016: Europa - Full Disk
<h1>PIA00275:  Europa In Color</h1><div class="PIA00275" lang="en" style="width:793px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>False color has been used here to enhance the visibility of certain features in this composite of three images of the Minos Linea region on Jupiter's moon Europa taken on 28 June 1996 Universal Time by the solid state imaging camera on NASA's Galileo spacecraft. Triple bands, lineae and mottled terrains appear in brown and reddish hues, indicating the presence of contaminants in the ice. The icy plains, shown here in bluish hues, subdivide into units with different albedos at infrared wavelengths probably because of differences in the grain size of the ice. The composite was produced using images with effective wavelengths at 989, 757, and 559 nanometers. The spatial resolution in the individual images ranges from 1.6 to 3.3 kilometers (1 to 2 miles) per pixel. The area covered, centered at 45N, 221 W, is about 1,260 km (about 780 miles) across.<p>The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.<p>This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at <a href="http://www2.jpl.nasa.gov/galileo/sepo/" target="_blank">http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at <a href="http://www2.jpl.nasa.gov/galileo/sepo/" target="_blank">http://www.jpl.nasa.gov/galileo/sepo</a>..<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00275" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00275:  Europa In Color	  sur le site de la NASA">Voir l'image 	 PIA00275:  Europa In Color	  sur le site de la NASA.</a></div>
PIA00275: Europa In Color
<h1>PIA00291:  Europa's Broken Ice</h1><div class="PIA00291" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">Jupiter's moon Europa, as seen in this image taken June 27, 1996 by NASA's Galileo spacecraft, displays features in some areas resembling ice floes seen in Earth's polar seas. Europa, about the size of Earth's moon, has an icy crust that has been severely fractured, as indicated by the dark linear, curved, and wedged-shaped bands seen here. These fractures have broken the crust into plates as large as 30 kilometers (18.5 miles) across. Areas between the plates are filled with material that was probably icy slush contaminated with rocky debris. Some individual plates were separated and rotated into new positions. Europa's density indicates that it has a shell of water ice as thick as 100 kilometers (about 60 miles), parts of which could be liquid. Currently, water ice could extend from the surface down to the rocky interior, but the features seen in this image suggest that motion of the disrupted icy plates was lubricated by soft ice or liquid water below the surface at the time of disruption. This image covers part of the equatorial zone of Europa and was taken from a distance of 156,000 kilometers (about 96,300 miles) by the solid-state imager camera on the Galileo spacecraft. North is to the right and the sun is nearly directly overhead. The area shown is about 360 by 770 kilometers (220-by-475 miles or about the size of Nebraska), and the smallest visible feature is about 1.6 kilometers (1 mile) across. The Jet Propulsion Laboratory manages the Galileo mission for NASA's Office of Space Science.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00291" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00291:  Europa's Broken Ice	  sur le site de la NASA">Voir l'image 	 PIA00291:  Europa's Broken Ice	  sur le site de la NASA.</a></div>
PIA00291: Europa's Broken Ice
<h1>PIA00294:  Europa's Active Surface</h1><div class="PIA00294" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">A newly discovered impact crater can be seen just right of the center of this image of Jupiter's moon Europa returned by NASA's Galileo spacecraft camera. The crater is about 30 kilometers (18.5 miles) in diameter. The impact excavated into Europa's icy crust, throwing debris (seen as whitish material) across the surrounding terrain. Also visible is a dark band, named Belus Linea, extending east-west across the image. This type of feature, which scientists call a 'triple band,' is characterized by a bright stripe down the middle. The outer margins of this and other triple bands are diffuse, suggesting that the dark material was put there as a result of possible geyser-like activity which shot gas and rocky debris from Europa's interior. The curving 'X' pattern seen in the lower left corner of the image appears to represent fracturing of the icy crust and infilling by slush which froze in place. The crater is centered at about 2 degrees north latitude by 239 degrees west longitude. The image was taken from a distance of 156,000 kilometers (about 96,300 miles) on June 27, 1996, during Galileo's first orbit around Jupiter. The area shown is 860 by 700 kilometers (530 by 430 miles), or about the size of Oregon and Washington combined. The Galileo mission is managed by NASA's Jet Propulsion Laboratory.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00294" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00294:  Europa's Active Surface	  sur le site de la NASA">Voir l'image 	 PIA00294:  Europa's Active Surface	  sur le site de la NASA.</a></div>
PIA00294: Europa's Active Surface
<h1>PIA00295:  Dark Bands on Europa</h1><div class="PIA00295" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">Dark crisscrossing bands on Jupiter's moon Europa represent widespread disruption from fracturing and the possible eruption of gases and rocky material from the moon's interior in this four-frame mosaic of images from NASA's Galileo spacecraft. These and other features suggest that soft ice or liquid water was present below the ice crust at the time of disruption. The data do not rule out the possibility that such conditions exist on Europa today. The pictures were taken from a distance of 156,000 kilometers (about 96,300 miles) on June 27, 1996. Many of the dark bands are more than 1,600 kilometers (1,000 miles) long, exceeding the length of the San Andreas fault of California. Some of the features seen on the mosaic resulted from meteoritic impact, including a 30- kilometer (18.5 mile) diameter crater visible as a bright scar in the lower third of the picture. In addition, dozens of shallow craters seen in some terrains along the sunset terminator zone (upper right shadowed area of the image) are probably impact craters. Other areas along the terminator lack craters, indicating relatively youthful surfaces, suggestive of recent eruptions of icy slush from the interior. The lower quarter of the mosaic includes highly fractured terrain where the icy crust has been broken into slabs as large as 30 kilometers (18.5 miles) across. The mosaic covers a large part of the northern hemisphere and includes the north pole at the top of the image. The sun illuminates the surface from the left. The area shown is centered on 20 degrees north latitude and 220 degrees west longitude and is about as wide as the United States west of the Mississippi River. The Galileo mission is managed by NASA's Jet Propulsion Laboratory.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00295" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00295:  Dark Bands on Europa	  sur le site de la NASA">Voir l'image 	 PIA00295:  Dark Bands on Europa	  sur le site de la NASA.</a></div>
PIA00295: Dark Bands on Europa
<h1>PIA00325:  Europa Crescent</h1><div class="PIA00325" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This mosaic of Europa, the smallest Galilean satellite, was taken by Voyager 2. This face of Europa is centered at about the 300 degree meridian. The bright areas are probably ice deposits, whereas the darkened areas may be the rocky surface or areas with a more patchy distribution of ice. The most unusual features are the systems of long linear structures that cross the surface in various directions. Some of these linear structures are over 1,000 kilometers long and about 2 or 3 kilometers wide. They may be fractures or faults which have disrupted the surface.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00325" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00325:  Europa Crescent	  sur le site de la NASA">Voir l'image 	 PIA00325:  Europa Crescent	  sur le site de la NASA.</a></div>
PIA00325: Europa Crescent
<h1>PIA00366:  Europa - Mosaic</h1><div class="PIA00366" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">Europa looks like a cracked egg in this computer mosaic of the best Voyager 2 images. In this presentation, the variation of surface brightness due to the angle of the sun has been removed by computer processing, so that surface features can be seen equally well at all places. The many broad dark streaks show up well, but this presentation does not bring out the much fainter and more enigmatic light streaks. These pictures were taken from a distance of about 250,000 kilometers and show features as small as 5 kilometers across.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00366" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00366:  Europa - Mosaic	  sur le site de la NASA">Voir l'image 	 PIA00366:  Europa - Mosaic	  sur le site de la NASA.</a></div>
PIA00366: Europa - Mosaic
<h1>PIA00459:  Europa During Voyager 2 Closest Approach</h1><div class="PIA00459" lang="en" style="width:704px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This color image of the Jovian moon Europa was acquired by Voyager 2 during its close encounter on Monday morning, July 9. Europa, the size of our moon, is thought to have a crust of ice perhaps 100 kilometers thick which overlies the silicate crust. The complex array of streaks indicate that the crust has been fractured and filled by materials from the interior. The lack of relief, any visible mountains or craters, on its bright limb is consistent with a thick ice crust. In contrast to its icy neighbors, Ganymede and Callisto, Europa has very few impact craters. One possible candidate is the small feature near the center of this image with radiating rays and a bright circular interior. The relative absence of features and low topography suggests the crust is young and warm a few kilometers below the surface. The tidal heating process suggested for Io also may be heating Europa's interior at a lower rate.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00459" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00459:  Europa During Voyager 2 Closest Approach	  sur le site de la NASA">Voir l'image 	 PIA00459:  Europa During Voyager 2 Closest Approach	  sur le site de la NASA.</a></div>
PIA00459: Europa During Voyager 2 Closest Approach
PIA00502-bis.jpg
PIA00502-bis.jpg
<h1>PIA00502:  Natural and False Color Views of Europa</h1><div class="PIA00502" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This image shows two views of the trailing hemisphere of Jupiter's ice-covered satellite, Europa. The left image shows the approximate natural color appearance of Europa. The image on the right is a false-color composite version combining violet, green and infrared images to enhance color differences in the predominantly water-ice crust of Europa. Dark brown areas represent rocky material derived from the interior, implanted by impact, or from a combination of interior and exterior sources. Bright plains in the polar areas (top and bottom) are shown in tones of blue to distinguish possibly coarse-grained ice (dark blue) from fine-grained ice (light blue). Long, dark lines are fractures in the crust, some of which are more than 3,000 kilometers (1,850 miles) long. The bright feature containing a central dark spot in the lower third of the image is a young impact crater some 50 kilometers (31 miles) in diameter. This crater has been provisionally named "Pwyll" for the Celtic god of the underworld.<p>Europa is about 3,160 kilometers (1,950 miles) in diameter, or about the size of Earth's moon. This image was taken on September 7, 1996, at a range of 677,000 kilometers (417,900 miles) by the solid state imaging television camera onboard the Galileo spacecraft during its second orbit around Jupiter. The image was processed by Deutsche Forschungsanstalt fuer Luftund Raumfahrt e.V., Berlin, Germany.<p>The Jet Propulsion Laboratory, Pasadena, CA, manages the mission for NASA's Office of Space Science, Washington, DC.<p>This image and other images and data received from Galileo are posted on the Galileo mission home page on the World Wide Web at http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at <a href="http://www2.jpl.nasa.gov/galileo/sepo/" target="_blank">http://www.jpl.nasa.gov/galileo/sepo</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00502" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00502:  Natural and False Color Views of Europa	  sur le site de la NASA">Voir l'image 	 PIA00502:  Natural and False Color Views of Europa	  sur le site de la NASA.</a></div>
PIA00502: Natural and False Color Views of Europa
<h1>PIA00518:  Ridges on Europa</h1><div class="PIA00518" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This view of Jupiter's moon Europa shows a portion of the surface that has been highly disrupted by fractures and ridges. This picture covers an area about 238 kilometers (150 miles) wide by 225 kilometers (140 miles), or about the distance between Los Angeles and San Diego. Symmetric ridges in the dark bands suggest that the surface crust was separated and filled with darker material, somewhat analogous to spreading centers in the ocean basins of Earth. Although some impact craters are visible, their general absence indicates a youthful surface. The youngest ridges, such as the two features that cross the center of the picture, have central fractures, aligned knobs, and irregular dark patches. These and other features could indicate cryovolcanism, or processes related to eruption of ice and gases.<p>This picture, centered at 16 degrees south latitude, 196 degrees west longitude, was taken at a distance of 40,973 kilometers (25,290 mi) on November 6, 1996 by the Galileo spacecraft solid state imaging television camera onboard the Galileo spacecraft during its third orbit around Jupiter.<p>The Galileo mission is managed by the Jet Propulsion Laboratory for NASA's Office of Space Science, Washington, D.C.<p>This image and other images and data received from Galileo are posted on the Galileo mission home page on the World Wide Web at http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at <a href="http://www2.jpl.nasa.gov/galileo/sepo/" target="_blank">http://www.jpl.nasa.gov/galileo/sepo</a>.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00518" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00518:  Ridges on Europa	  sur le site de la NASA">Voir l'image 	 PIA00518:  Ridges on Europa	  sur le site de la NASA.</a></div>
PIA00518: Ridges on Europa
<h1>PIA00539:  Jupiter's Icy Satellite Europa</h1><div class="PIA00539" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This image of Europa, an icy satellite of Jupiter, was obtained from a range of 39028 miles (62089 kilometers) by the Galileo spacecraft during its fourth orbit around Jupiter and its first close pass of Europa. The image spans an area 157 miles by 244 miles (252 km by 393 km), and shows features as small as a mile (1.6 km) across. Sun illumination is from the right, revealing several ridges crossing the scene, plateaus commonly several miles (10 km) across, and patches of smooth, low-lying darker materials. No prominent impact craters are visible, indicating the surface in this location is not geologically ancient. Some ridges have gaps, and subtle textural differences in these areas indicate that missing ridge segments probably were swept away by volcanic flows. The flow deposits are probably composed mainly of water ice, the chief constituent of the surface of Europa.</p><p>The Galileo mission is managed by the Jet Propulsion Laboratory for NASA's Office of Space Science, Washington, D.C.</p><p>This image and other images and data received from Galileo are posted on the Galileo mission home page on the World Wide Web at <a href="http://galileo.jpl.nasa.gov/">http://galileo.jpl.nasa.gov/</a>. Background information and educational context for the images can be found at <a href="http://www2.jpl.nasa.gov/galileo/sepo/">http://www2.jpl.nasa.gov/galileo/sepo/</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00539" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00539:  Jupiter's Icy Satellite Europa	  sur le site de la NASA">Voir l'image 	 PIA00539:  Jupiter's Icy Satellite Europa	  sur le site de la NASA.</a></div>
PIA00539: Jupiter's Icy Satellite Europa
<h1>PIA00540:  Flows on Europa</h1><div class="PIA00540" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">The icy surface of Europa, one of the moons of Jupiter, was photographed by the Galileo spacecraft on its fourth orbit around Jupiter. The area shown here is about 77 miles (124 kilometers) by 115 miles (186 kilometers) across and shows features as small as a half a mile (800 meters) across. Thick, lobate flows, the first seen on Europa or any of the icy satellites of Jupiter, are visible in several areas, including the lower right quarter of the picture where one flow cuts across a prominent ridge. Most of the ridges on the left side of the picture appear to be partly buried or subdued by flows. The ice-rich surface of Europa suggests that the flows might also be ice, perhaps erupted onto the surface from the interior as viscous, glacierlike masses.<p>This picture was taken by the solid state imaging television camera on board the Galileo spacecraft at a distance of 39,191 miles (63,490 kilometers). The picture is centered at 319.5 degrees West, 5.11 degrees North; north is toward the top of the image with the sun shining from the right to the left.<p>The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.<p>This image and other images and data received from Galileo are posted on the Galileo mission home page on the World Wide Web at http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at <a href="http://www2.jpl.nasa.gov/galileo/sepo/" target="_blank">http://www.jpl.nasa.gov/galileo/sepo</a>..<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00540" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00540:  Flows on Europa	  sur le site de la NASA">Voir l'image 	 PIA00540:  Flows on Europa	  sur le site de la NASA.</a></div>
PIA00540: Flows on Europa
<h1>PIA00541:  Macula on Europa</h1><div class="PIA00541" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This image of Europa, an icy satellite of Jupiter about the size of the Earth's Moon, was obtained from a range of 7415 miles (11933 kilometers) by the Galileo spacecraft during its fourth orbit around Jupiter and its first close pass of Europa. The image spans 30 miles by 57 miles (48 km by 91 km) and shows features as small as 800 feet (240 meters) across. The large circular feature centered in the upper middle of the image is called a macula, and could be the scar of a large meteorite impact. The surface of Europa is composed mostly of water ice, so large impact craters on Europa could look different from large bowl-shaped depressions formed by impact into rock, such as on the Moon. On Europa's icy surface, the original impact crater has been modified into a central zone of rugged topography surrounded by circular fractures which reflect adjustments to stress in the surrounding icy crust.<p>The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.<p>This image and other images and data received from Galileo are posted on the Galileo mission home page on the World Wide Web at http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at <a href="http://www2.jpl.nasa.gov/galileo/sepo/" target="_blank">http://www.jpl.nasa.gov/galileo/sepo</a>..<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00541" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00541:  Macula on Europa	  sur le site de la NASA">Voir l'image 	 PIA00541:  Macula on Europa	  sur le site de la NASA.</a></div>
PIA00541: Macula on Europa
<h1>PIA00542:  Prominent Doublet Ridges on Europa</h1><div class="PIA00542" lang="en" style="width:725px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This image of Jupiter's satellite Europa was obtained from a range of 7364 miles (11851 km) by the Galileo spacecraft during its fourth orbit around Jupiter and its first close pass of Europa. The image spans 30 miles by 57 miles (48 km x 91 km) and shows features as small as 800 feet (240 meters) across, a resolution more than 150 times better than the best Voyager coverage of this area. The sun illuminates the scene from the right. The large circular feature in the upper left of the image could be the scar of a large meteorite impact. Clusters of small craters seen in the right of the image may mark sites where debris thrown from this impact fell back to the surface. Prominent doublet ridges over a mile (1.6 km) wide cross the plains in the right part of the image; younger ridges overlap older ones, allowing the sequence of formation to be determined. Gaps in ridges indicate areas where emplacement of new surface material has obliterated pre-existing terrain.<p>The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.<p>This image and other images and data received from Galileo are posted on the Galileo mission home page on the World Wide Web at http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at <a href="http://www2.jpl.nasa.gov/galileo/sepo/" target="_blank">http://www.jpl.nasa.gov/galileo/sepo</a>..<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00542" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00542:  Prominent Doublet Ridges on Europa	  sur le site de la NASA">Voir l'image 	 PIA00542:  Prominent Doublet Ridges on Europa	  sur le site de la NASA.</a></div>
PIA00542: Prominent Doublet Ridges on Europa
<h1>PIA00543:  Structurally Complex Surface of Europa</h1><div class="PIA00543" lang="en" style="width:621px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This is a composite of two images of Jupiter's icy moon Europa obtained from a range of 2119 miles (3410 kilometers) by the Galileo spacecraft during its fourth orbit around Jupiter and its first close pass of Europa. The mosaic spans 11 miles by 30 miles (17 km by 49 km) and shows features as small as 230 feet (70 meters) across. This mosaic is the first very high resolution image data obtained of Europa, and has a resolution more than 50 times better than the best Voyager coverage and 500 times better than Voyager coverage in this area. The mosaic shows the surface of Europa to be structurally complex. The sun illuminates the scene from the right, revealing complex overlapping ridges and fractures in the upper and lower portions of the mosaic, and rugged, more chaotic terrain in the center. Lateral faulting is revealed where ridges show offsets along their lengths (upper left of the picture). Missing ridge segments indicate obliteration of pre-existing materials and emplacement of new terrain (center of the mosaic). Only a small number of impact craters can be seen, indicating the surface is not geologically ancient.<p>The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.<p>This image and other images and data received from Galileo are posted on the Galileo mission home page on the World Wide Web at http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at <a href="http://www2.jpl.nasa.gov/galileo/sepo/" target="_blank">http://www.jpl.nasa.gov/galileo/sepo</a>..<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00543" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00543:  Structurally Complex Surface of Europa	  sur le site de la NASA">Voir l'image 	 PIA00543:  Structurally Complex Surface of Europa	  sur le site de la NASA.</a></div>
PIA00543: Structurally Complex Surface of Europa
<h1>PIA00544:  Ridges on Europa</h1><div class="PIA00544" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This is the highest resolution picture ever taken of the Jupiter moon, Europa. The area shown is about 5.9 by 9.9 miles (9.6 by 16 kilometers) and the smallest visible feature is about the size of a football field. In this view, the ice-rich surface has been broken into a complex pattern by cross-cutting ridges and grooves resulting from tectonic processes. Sinuous rille-like features and knobby terrain could result from surface modifications of unknown origins. Small craters of possible impact origin range in size from less than 330 feet (100 meters) to about 1300 feet (400 meters) across are visible.<p>This image was taken by the solid state imaging television camera aboard the Galileo during its fourth orbit around Jupiter, at a distance of 2060 miles (3340 kilometers). The picture is centered at 325 degrees West, 5.83 degrees North. North is toward the top of this image, with the sun shining from the right.<p>The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.<p>This image and other images and data received from Galileo are posted on the Galileo mission home page on the World Wide Web at http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at <a href="http://www2.jpl.nasa.gov/galileo/sepo/" target="_blank">http://www.jpl.nasa.gov/galileo/sepo</a>..<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00544" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00544:  Ridges on Europa	  sur le site de la NASA">Voir l'image 	 PIA00544:  Ridges on Europa	  sur le site de la NASA.</a></div>
PIA00544: Ridges on Europa
<h1>PIA00578:  Europa Ice Floes</h1><div class="PIA00578" lang="en" style="width:630px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">Jupiter's moon Europa, as seen in this image taken June 27, 1996 by NASA's Galileo spacecraft, displays features in some areas resembling ice floes seen in Earth's polar seas. Europa, about the size of Earth's moon, has an icy crust that has been severely fractured, as indicated by the dark linear, curved, and wedged-shaped bands seen here. These fractures have broken the crust into plates as large as 30 kilometers (18.5 miles) across. Areas between the plates are filled with material that was probably icy slush contaminated with rocky debris. Some individual plates were separated and rotated into new positions. Europa's density indicates that it has a shell of water ice thicker than 100 kilometers (about 60 miles), parts of which could be liquid. Currently, water ice could extend from the surface down to the rocky interior, but the features seen in this image suggest that motion of the disrupted icy plates was lubricated by soft ice or liquid water below the surface at the time of disruption. This image covers part of the equatorial zone of Europa and was taken from a distance of 156,000 kilometers (about 96,300 miles) by the Solid-state Imaging Subsystem on the Galileo spacecraft. North is to the right and the sun is nearly directly overhead. The area shown is about 510 by 989 kilometers (310-by-600 miles), and the smallest visible feature is about 1.6 kilometers (1 mile) across.<p>The Jet Propulsion Laboratory manages the Galileo mission for NASA's Office of Space Science, Washington, DC.<p>This image and other images and data received from Galileo are posted on the World Wide Web Galileo mission home page at http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at http:// www.jpl.nasa.gov/galileo/sepo.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00578" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00578:  Europa Ice Floes	  sur le site de la NASA">Voir l'image 	 PIA00578:  Europa Ice Floes	  sur le site de la NASA.</a></div>
PIA00578: Europa Ice Floes
<h1>PIA00586:  Pwyll Crater on Europa</h1><div class="PIA00586" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">Pwyll crater on Jupiter's moon, Europa, was photographed by the Solid State Imaging system on the Galileo spacecraft during its sixth orbit around Jupiter. This impact crater is located at 26 degrees south latitude, 271 degrees west longitude, and is about 26 kilometers (16 miles) in diameter. Lower resolution pictures of Pwyll Crater taken earlier in the mission show that material ejected by the impact can be traced for hundreds of miles across the icy surface of Europa. The dark zone seen here in and around the crater is material excavated from several kilometers (a few miles) below the surface. Also visible in this picture are complex ridges.<p>The two images comprising this mosaic were taken on February 20, 1997 from a distance of 12,000 kilometers (7,500 miles) by the Galileo spacecraft. The area shown is about 120 kilometers by 100 kilometers (75 miles by 60 miles).<p>The Jet Propulsion Laboratory, Pasadena, CA, manages the mission for NASA's Office of Space Science, Washington D.C. This image and other images and data received from Galileo are posted on the World Wide Web Galileo mission home page at http://galileo.jpl.nasa.gov.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00586" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00586:  Pwyll Crater on Europa	  sur le site de la NASA">Voir l'image 	 PIA00586:  Pwyll Crater on Europa	  sur le site de la NASA.</a></div>
PIA00586: Pwyll Crater on Europa
<h1>PIA00587:  Close-up of Europa's Trailing Hemisphere</h1><div class="PIA00587" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This complex terrain on Jupiter's moon, Europa, shows an area centered at 8 degrees north latitude, 275.4 degrees west longitude, in the trailing hemisphere. As Europa moves in its orbit around Jupiter, the trailing hemisphere is the portion which is always on the moon's backside opposite to its direction of motion. The area shown is about 100 kilometers by 140 kilometers (62 miles by 87 miles). The complex ridge crossing the picture in the upper left corner is part of a feature that can be traced hundreds of miles across the surface of Europa, extending beyond the edge of the picture. The upper right part of the picture shows terrain that has been disrupted by an unknown process, superficially resembling blocks of sea ice during a springtime thaw. Also visible are semicircular mounds surrounded by shallow depressions. These might represent the intrusion of material punching through the surface from below and partial melting of Europa's icy crust. The resolution of this image is about 180 meters (200 yards); this means that the smallest visible object is about a quarter of a mile across.<p>This picture of Europa was taken by Galileo's Solid State Imaging system from a distance of 17,900 kilometers (11,100 miles) on the spacecraft's sixth orbit around Jupiter, on February 20, 1997.<p>The Jet Propulsion Laboratory, Pasadena, CA, manages the mission for NASA's Office of Space Science, Washington D.C. This image and other images and data received from Galileo are posted on the World Wide Web Galileo mission home page at http://galileo.jpl.nasa.gov.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00587" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00587:  Close-up of Europa's Trailing Hemisphere	  sur le site de la NASA">Voir l'image 	 PIA00587:  Close-up of Europa's Trailing Hemisphere	  sur le site de la NASA.</a></div>
PIA00587: Close-up of Europa's Trailing Hemisphere
<h1>PIA00588:  Europa Ridges, Hills and Domes</h1><div class="PIA00588" lang="en" style="width:635px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This moderate-resolution view of the surface of one of Jupiter's moons, Europa, shows the complex icy crust that has been extensively modified by fracturing and the formation of ridges. The ridge systems superficially resemble highway networks with overpasses, interchanges and junctions. From the relative position of the overlaps, it is possible to determine the age sequence for the ridge sets. For example, while the 8-kilometer-wide (5-mile) ridge set in the lower left corner is younger than most of the terrain seen in this picture, a narrow band cuts across the set toward the bottom of the picture, indicating that the band formed later. In turn, this band is cut by the narrow 2- kilometer-wide (1.2-mile) double ridge running from the lower right to upper left corner of the picture. Also visible are numerous clusters of hills and low domes as large as 9 kilometers (5.5 miles) across, many with associated dark patches of non-ice material. The ridges, hills and domes are considered to be ice-rich material derived from the subsurface. These are some of the youngest features seen on the surface of Europa and could represent geologically young eruptions.<p>This area covers about 140 kilometers by 130 kilometers (87 miles by 81 miles) and is centered at 12.3 degrees north latitude, 268 degrees west longitude. Illumination is from the east (right side of picture). The resolution is about 180 meters (200 yards) per pixel, meaning that the smallest feature visible is about a city block in size. The picture was taken by the Solid State Imaging system on board the Galileo spacecraft on February 20, 1997, from a distance of 17,700 kilometers (11,000 miles) during its sixth orbit around Jupiter.<p>The Jet Propulsion Laboratory, Pasadena, CA, manages the mission for NASA's Office of Space Science, Washington D.C. This image and other images and data received from Galileo are posted on the World Wide Web Galileo mission home page at http://galileo.jpl.nasa.gov.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00588" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00588:  Europa Ridges, Hills and Domes	  sur le site de la NASA">Voir l'image 	 PIA00588:  Europa Ridges, Hills and Domes	  sur le site de la NASA.</a></div>
PIA00588: Europa Ridges, Hills and Domes
<h1>PIA00589:  Mosaic of Europa's Ridges, Craters</h1><div class="PIA00589" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This view of the icy surface of Jupiter's moon, Europa, is a mosaic of two pictures taken by the Solid State Imaging system on board the Galileo spacecraft during a close flyby of Europa on February 20, 1997. The pictures were taken from a distance of 2,000 kilometers (1,240 miles). The area shown is about 14 kilometers by 17 kilometers (8.7 miles by 10.6 miles), and has a resolution of 20 meters (22 yards) per pixel. Illumination is from the right (east). The picture is centered at about 14.8 north latitude, 273.8 west longitude, in Europa's trailing hemisphere.<p>One of the youngest features seen in this area is the double ridge cutting across the picture from the lower left to the upper right. This double ridge is about 2.6 kilometers (1.6 miles) wide and stands some 300 meters (330 yards) high. Small craters are most easily seen in the smooth deposits along the south margin of the prominent double ridge, and in the rugged ridged terrain farther south. The complexly ridged terrain seen here shows that parts of the icy crust of Europa have been modified by intense faulting and disruption, driven by energy from the planet's interior.<p>The Jet Propulsion Laboratory, Pasadena, CA, manages the mission for NASA's Office of Space Science, Washington D.C. This image and other images and data received from Galileo are posted on the World Wide Web Galileo mission home page at: http://galileo.jpl.nasa.gov.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00589" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00589:  Mosaic of Europa's Ridges, Craters	  sur le site de la NASA">Voir l'image 	 PIA00589:  Mosaic of Europa's Ridges, Craters	  sur le site de la NASA.</a></div>
PIA00589: Mosaic of Europa's Ridges, Craters
<h1>PIA00590:  Europa Triple Band</h1><div class="PIA00590" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This picture of Europa, a moon of Jupiter, was obtained on February 20, 1997, by the Solid State Imaging system onboard the Galileo spacecraft during its sixth orbit around Jupiter. The area is centered at 9.3 degrees north latitude, 275.7 degrees west longitude, on the trailing hemisphere of Europa. As Europa moves in its orbit around Jupiter, the trailing hemisphere is the portion which is always on the moon's backside opposite to its direction of motion. The area depicted is about 32 kilometers by 40 kilometers (20 miles by 25 miles). Resolution is 54 meters (59 yards). The Sun illuminates the scene from the right (east).<p>A section of a triple band crosses the upper left of the picture and extends for hundreds of miles across the surface. Triple bands derive their name from their appearance at lower resolution as a narrow bright band flanked by a pair of darker bands. At the high resolution of this picture, however, the triple band is much more complex and is composed of a system of ridges 6 kilometers (4 miles) across. Some ridges reach heights of about 180 meters (200 yards). Other features include a hill in the center of the picture about 480 meters (500 yards) high. Two mounds about 6 kilometers across (4 miles) are seen in the bottom of the picture. The ridges, hills and mounds probably all represent uplifts of the icy crust of Europa by processes originating from the interior.<p>The Jet Propulsion Laboratory, Pasadena, CA, manages the mission for NASA's Office of Space Science, Washington D.C. This image and other images and data received from Galileo are posted on the World Wide Web Galileo mission home page at: http://galileo.jpl.nasa.gov.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00590" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00590:  Europa Triple Band	  sur le site de la NASA">Voir l'image 	 PIA00590:  Europa Triple Band	  sur le site de la NASA.</a></div>
PIA00590: Europa Triple Band
<h1>PIA00591:  Europa Ice Rafts</h1><div class="PIA00591" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This high resolution image shows the ice-rich crust of Europa, one of the moons of Jupiter. Seen here are crustal plates ranging up to 13 kilometers (8 miles) across, which have been broken apart and "rafted" into new positions, superficially resembling the disruption of pack-ice on polar seas during spring thaws on Earth. The size and geometry of these features suggest that motion was enabled by ice-crusted water or soft ice close to the surface at the time of disruption.<p>The area shown is about 34 kilometers by 42 kilometers (21 miles by 26 miles), centered at 9.4 degrees north latitude, 274 degrees west longitude, and the resolution is 54 meters (59 yards). This picture was taken by the Solid State Imaging system on board the Galileo spacecraft on February 20, 1997, from a distance of 5,340 kilometers (3,320 miles) during the spacecraft's close flyby of Europa.<p>The Jet Propulsion Laboratory, Pasadena, CA, manages the mission for NASA's Office of Space Science, Washington D.C. This image and other images and data received from Galileo are posted on the World Wide Web Galileo mission home page at: http://galileo.jpl.nasa.gov.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00591" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00591:  Europa Ice Rafts	  sur le site de la NASA">Voir l'image 	 PIA00591:  Europa Ice Rafts	  sur le site de la NASA.</a></div>
PIA00591: Europa Ice Rafts
<h1>PIA00592:  Close-up of Europa's Surface</h1><div class="PIA00592" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This close-up view of the icy surface of Europa, a moon of Jupiter, was obtained on December 20, 1996, by the Solid State Imaging system on board the Galileo spacecraft during its fourth orbit around Jupiter. The view is about 11 kilometers by 16 kilometers (7 miles by 10 miles) and has a resolution of 26 meters (28 yards). The Sun illuminates the scene from the east (right).<p>A flat smooth area about 3.2 kilometers (2 miles) across is seen in the left part of the picture. This area resulted from flooding by a fluid which erupted onto the surface and buried sets of ridges and grooves. The smooth area contrasts with a distinctly rugged patch of terrain farther east, to the right of the prominent ridge system running down the middle of the picture. The rugged patch of terrain is 4 kilometers (2.5 miles) across and represents localized disruption of the complex network of ridges in the area. Eruptions of material onto the surface, crustal disruption, and the formation of complex networks of folded and faulted ridges show that significant energy was available in the interior of Europa. Although small impact craters are most easily seen in the smooth area, they occur throughout the ridged terrain seen in this view.<p>The Jet Propulsion Laboratory, Pasadena, CA, manages the mission for NASA's Office of Space Science, Washington D.C. This image and other images and data received from Galileo are posted on the World Wide Web Galileo mission home page at: http://galileo.jpl.nasa.gov.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00592" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00592:  Close-up of Europa's Surface	  sur le site de la NASA">Voir l'image 	 PIA00592:  Close-up of Europa's Surface	  sur le site de la NASA.</a></div>
PIA00592: Close-up of Europa's Surface
<h1>PIA00595:  Icy Europa and similar scales on Earth</h1><div class="PIA00595" lang="en" style="width:674px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This is the first in a series of products that compare images at increasing resolutions of various areas on Jupiter's <a href="/catalog/PIA00539">icy moon Europa</a> (top frame) to the same location on Earth, the San Francisco Bay area of California (bottom frame). Both images show areas of roughly equal size, 252 by 393 kilometers (157 by 244 miles), and resolution, 630 meters (690 yards). This means that the smallest identifiable feature is less than a mile across (2 pixels wide). North is to the top of the picture.<p>The sun illumination from the right in the Europa image reveals several ridges crossing the scene, plateaus commonly several miles (10 km) across, and patches of smooth, low-lying darker materials. No prominent impact craters are visible, indicating the surface in this location is not geologically ancient. Some ridges have gaps, and subtle textural differences in these areas indicate that missing ridge segments probably were swept away by volcanic flows. The flow deposits are probably composed mainly of water ice, the chief constituent of the surface of Europa.<p>The Earth based image (lower frame) covers an area stretching from San Francisco Bay (top left) to the Nevada border (top right) and from Mono Lake in (top center) to the Mojave Desert (bottom right). Other predominant geographic features include the snow capped Sierra Nevada Mountains and California's Great Central Valley (center frame).<p>The Europa image was obtained from a range of 62089 kilometers (39028 miles) by the Solid State Imaging (CCD) system aboard NASA's Galileo spacecraft on December 19th, 1996 (Universal Time). The San Francisco Bay area image, from the NOAA satellite's Advanced Very High Resolution Radiometer (AVHRR) instrument, has been reprocessed to roughly match Galileo's resolution so as to offer a sense of the size of the features visible on Europa's surface.<p>The Jet Propulsion Laboratory, Pasadena, CA, manages the mission for NASA's Office of Space Science, Washington D.C. This image and other images and data received from Galileo are posted on the World Wide Web Galileo mission home page at: http://galileo.jpl.nasa.gov.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00595" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00595:  Icy Europa and similar scales on Earth	  sur le site de la NASA">Voir l'image 	 PIA00595:  Icy Europa and similar scales on Earth	  sur le site de la NASA.</a></div>
PIA00595: Icy Europa and similar scales on Earth
<h1>PIA00596:  Close-up of Europa's Trailing Hemisphere and similar scales on Earth</h1><div class="PIA00596" lang="en" style="width:771px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This is the second in a series of five products at increasing resolutions that compare images of various areas on Jupiter's <a href="/catalog/PIA00587">icy moon Europa</a> (top frame) to the same location on Earth, the San Francisco Bay area of California (bottom frame). Both images show areas of equal size, 100 by 140 kilometers (62 by 87 miles), and resolution, 180 meters (200 yards). This means that the smallest visible object is about a quarter of a mile across. North is to the top of the picture.<p>This complex terrain shows an area centered at 8 degrees north latitude, 275.4 degrees west longitude, in the trailing hemisphere. As Europa moves in its orbit around Jupiter, the trailing hemisphere is the portion which is always on the moon's backside opposite to its direction of motion. The complex ridge crossing the picture in the upper left corner is part of a feature that can be traced hundreds of miles across the surface of Europa, extending beyond the edge of the picture. The upper right part of the picture shows terrain that has been disrupted by an unknown process, superficially resembling blocks of sea ice during a springtime thaw. Also visible are semicircular mounds surrounded by shallow depressions. These might represent the intrusion of material punching through the surface from below and partial melting of Europa's icy crust.<p>In the San Francisco Bay area image, the level of detail is such that jigsaw puzzle like patterns of agricultural fields can be seen in the upper right corner and some levels of physical relief can be detected in the coastal mountain ranges. Also discernible at this resolution are the vast urban areas along the shores of the bay. Alcatraz Island appears as a tiny speck at center frame.<p>The Europa image was obtained from a range of 17,900 kilometers (11,100 miles) by the Solid State Imaging (CCD) system aboard NASA's Galileo spacecraft on February 20th, 1997 (Universal Time). The San Francisco Bay area image, from the LandSat Thematic Mapper, has been reprocessed to match Galileo's resolution so as to offer a sense of the size of the features visible on Europa's surface.<p>The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.<p>This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at URL http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at <a href="http://www2.jpl.nasa.gov/galileo/sepo/" target="_blank">http://www.jpl.nasa.gov/galileo/sepo</a>..<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00596" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00596:  Close-up of Europa's Trailing Hemisphere and similar scales on Earth	  sur le site de la NASA">Voir l'image 	 PIA00596:  Close-up of Europa's Trailing Hemisphere and similar scales on Earth	  sur le site de la NASA.</a></div>
PIA00596: Close-up of Europa's Trailing Hemisphere and similar scales on Earth
<h1>PIA00597:  Europa Ice Rafts and similar scales on Earth</h1><div class="PIA00597" lang="en" style="width:750px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This is the third in a series of five products at increasing resolutions that compare images of various areas on Jupiter's <a href="/catalog/PIA00591">moon Europa</a> (top frame) to the same location on Earth, the San Francisco Bay area of California (bottom frame). Both images show areas of equal size, 34 by 42 kilometers (21 by 26 miles), and resolution, 54 meters (59 yards). North is to the top of the picture.<p>This high resolution image shows Europa's ice-rich crust with crustal plates ranging up to 13 kilometers (8 miles) across, which have been broken apart and "rafted" into new positions, superficially resembling the disruption of pack-ice on polar seas during spring thaws on Earth. The size and geometry of these features suggest that motion was enabled by ice-crusted water or soft ice close to the surface at the time of disruption. This Europa image is centered at 9.4 degrees north latitude, 274 degrees west longitude,<p>The San Francisco Bay portion of this image pair helps to give the viewer some sense of scale as it relates to the size of the Europa "ice rafts." Look, for example, at the cratered "ice raft" in the lower left hand portion of the Europa image. Compare that to such features in the Bay area image as Treasure Island Naval Station, (center frame) and the San Francisco International Airport (bottom right). Also in this image, at 54 meters resolution, structural features such as the Golden Gate Bridge and the Bay Bridge are clearly visible.<p>The Europa image was obtained from a range of 5,340 kilometers (3,320 miles) by the Solid State Imaging (CCD) system aboard NASA's Galileo spacecraft on February 20th, 1997 (Universal Time). The San Francisco Bay area image, from the LandSat Thematic Mapper, has been reprocessed to match Galileo's resolution so as to offer a sense of the size of the features visible on Europa's surface.<p>The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.<p>This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at URL http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at <a href="http://www2.jpl.nasa.gov/galileo/sepo/" target="_blank">http://www.jpl.nasa.gov/galileo/sepo</a>..<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA00597" onclick="window.open(this.href); return false;" title="Voir l'image 	 PIA00597:  Europa Ice Rafts and similar scales on Earth	  sur le site de la NASA">Voir l'image 	 PIA00597:  Europa Ice Rafts and similar scales on Earth	  sur le site de la NASA.</a></div>
PIA00597: Europa Ice Rafts and similar scales on Earth

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