Galerie de photos de la planète Jupiter

<h1>PIA02869: Southern Hemisphere Storms</h1><div class="PIA02869" lang="en" style="width:720px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><br><a href="/figures/PIA02869.mov">Quicktime file</a> (131k)<br><a href="/figures/PIA02869.avi">Larger AVI file</a> (406k)<p>This movie clip (of which the release image is a still frame), created from images taken by NASA's Cassini spacecraft, shows white oval storms in Jupiter's southern hemisphere that rotate counterclockwise, similar to the larger Great Red Spot. These storms are very stable and persist for decades.<p>Cassini is a cooperative mission of NASA, the European Space Agency and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages Cassini for NASA's Office of Space Science, Washington, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02869" onclick="window.open(this.href); return false;" title="Voir l'image PIA02869: Southern Hemisphere Storms sur le site de la NASA">Voir l'image PIA02869: Southern Hemisphere Storms sur le site de la NASA.</a></div>
PIA02869: Southern Hemisphere Storms
<h1>PIA02870: Small Storms Near Great Red Spot</h1><div class="PIA02870" lang="en" style="width:720px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><br><a href="/figures/PIA02870.mov">Quicktime file</a> (149k)<br><a href="/figures/PIA02870.avi">Larger AVI file</a> (454k)<p>This movie clip (of which the release image is a still frame), created from images taken by NASA's Cassini spacecraft, shows small spots slipping over each other east of Jupiter's Great Red Spot. These small storms are born in the turbulent region west of the Great Red Spot, then move westward all the way around the planet until they again encounter the Red Spot from the east, when they are often swallowed by the Red Spot.<p>Cassini is a cooperative mission of NASA, the European Space Agency and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages Cassini for NASA's Office of Space Science, Washington, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02870" onclick="window.open(this.href); return false;" title="Voir l'image PIA02870: Small Storms Near Great Red Spot sur le site de la NASA">Voir l'image PIA02870: Small Storms Near Great Red Spot sur le site de la NASA.</a></div>
PIA02870: Small Storms Near Great Red Spot
<h1>PIA02871: Storm Merger on Jupiter</h1><div class="PIA02871" lang="en" style="width:720px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><br><a href="/figures/PIA02871.mov">Quicktime file</a> (158k)<br><a href="/figures/PIA02871.avi">Larger AVI file</a> (529k)<p>At the beginning of this movie clip, created from images taken by NASA's Cassini spacecraft, a small white spot, probably a thunderstorm, lies to the south of a larger, brown spot on Jupiter. The white spot moves counterclockwise around the brown spot and breaks up . A part of the white spot is absorbed by the brown spot.<p>Cassini is a cooperative mission of NASA, the European Space Agency and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages Cassini for NASA's Office of Space Science, Washington, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02871" onclick="window.open(this.href); return false;" title="Voir l'image PIA02871: Storm Merger on Jupiter sur le site de la NASA">Voir l'image PIA02871: Storm Merger on Jupiter sur le site de la NASA.</a></div>
PIA02871: Storm Merger on Jupiter
<h1>PIA02872: Satellite Rings Movie</h1><div class="PIA02872" lang="en" style="width:640px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This brief movie clip (of which the release image is a still frame), taken by NASA's Cassini spacecraft as it approached Jupiter, shows the motions, over a 16 hour-period, of two satellites embedded in Jupiter's ring. The moon Adrastea is the fainter of the two, and Metis the brighter. Images such as these will be used to refine the orbits of the two bodies.<p>The movie was made from images taken during a 40-hour sequence of the Jovian ring on December 11, 2000.<p>Cassini is a cooperative mission of NASA, the European Space Agency and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages Cassini for NASA's Office of Space Science, Washington, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02872" onclick="window.open(this.href); return false;" title="Voir l'image PIA02872: Satellite Rings Movie sur le site de la NASA">Voir l'image PIA02872: Satellite Rings Movie sur le site de la NASA.</a></div>
PIA02872: Satellite Rings Movie
<h1>PIA02873: High Resolution Globe of Jupiter</h1><div class="PIA02873" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This true-color simulated view of Jupiter is composed of 4 images taken by NASA's Cassini spacecraft on December 7, 2000. To illustrate what Jupiter would have looked like if the cameras had a field-of-view large enough to capture the entire planet, the cylindrical map was projected onto a globe. The resolution is about 144 kilometers (89 miles) per pixel. Jupiter's moon Europa is casting the shadow on the planet.<p>Cassini is a cooperative mission of NASA, the European Space Agency and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages Cassini for NASA's Office of Space Science, Washington, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02873" onclick="window.open(this.href); return false;" title="Voir l'image PIA02873: High Resolution Globe of Jupiter sur le site de la NASA">Voir l'image PIA02873: High Resolution Globe of Jupiter sur le site de la NASA.</a></div>
PIA02873: High Resolution Globe of Jupiter
<h1>PIA02875: Jupiter Hot Spot</h1><div class="PIA02875" lang="en" style="width:720px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><br><a href="/figures/PIA02875.mov">Quicktime file</a> (158k)<br><a href="/figures/PIA02875.avi">Larger AVI file</a> (499k)<p>In this movie clip (of which the release image is a still frame), created from images taken by NASA's Cassini spacecraft, the blue region in the center is a relatively cloud-free area where thermal radiation from warmer, deeper levels emerges. NASA's Galileo probe in 1995 entered Jupiter's atmosphere in a similar area.<p>Cassini is a cooperative mission of NASA, the European Space Agency and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages Cassini for NASA's Office of Space Science, Washington, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02875" onclick="window.open(this.href); return false;" title="Voir l'image PIA02875: Jupiter Hot Spot sur le site de la NASA">Voir l'image PIA02875: Jupiter Hot Spot sur le site de la NASA.</a></div>
PIA02875: Jupiter Hot Spot
<h1>PIA02876: Jupiter's High Latitudes</h1><div class="PIA02876" lang="en" style="width:720px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><br><a href="/figures/PIA02876.mov">Quicktime file</a> (158k)<br><a href="/figures/PIA02876.avi">Larger AVI file</a> (499k)<p>This movie clip (of which the release image is a still frame), created from images taken by NASA's Cassini spacecraft, shows a high-latitude area of Jupiter. At latitudes above 45 degrees, the banded appearance of Jupiter's clouds gives way to a more mottled appearance. T he cause of this transition is not fully understood.<p>Cassini is a cooperative mission of NASA, the European Space Agency and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages Cassini for NASA's Office of Space Science, Washing ton, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02876" onclick="window.open(this.href); return false;" title="Voir l'image PIA02876: Jupiter's High Latitudes sur le site de la NASA">Voir l'image PIA02876: Jupiter's High Latitudes sur le site de la NASA.</a></div>
PIA02876: Jupiter's High Latitudes
<h1>PIA02877: Jupiter in True and False Color</h1><div class="PIA02877" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>These color composite frames of the mid-section of Jupiter were of narrow angle images acquired on December 31, 2000, a day after Cassini's closest approach to the planet. The smallest features in these frames are roughly ~ 60 kilometers. The left is natural color, composited to yield the color that Jupiter would have if seen by the naked eye. The right frame is composed of 3 images: two were taken through narrow band filters centered on regions of the spectrum where the gaseous methane in Jupiter's atmosphere absorbs light, and the third was taken in a red continuum region of the spectrum, where Jupiter has no absorptions. The combination yields an image whose colors denote the height of the clouds. Red regions are deep water clouds, bright blue regions are high haze (like the blue covering the Great Red Spot). Small, intensely bright white spots are energetic lightning storms which have penetrated high into the atmosphere where there is no opportunity for absorption of light: these high cloud systems reflect all light equally. The darkest blue regions -- for example, the long linear regions which border the northern part of the equatorial zone, are the very deep "hot spots', seen in earlier images, from which Jovian thermal emission is free to escape to space. This is the first time that global images of Jupiter in all the methane and attendant continuum filters have been acquired by a spacecraft. From images like these, the stratigraphy of Jupiter's dynamic atmosphere will be determined.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02877" onclick="window.open(this.href); return false;" title="Voir l'image PIA02877: Jupiter in True and False Color sur le site de la NASA">Voir l'image PIA02877: Jupiter in True and False Color sur le site de la NASA.</a></div>
PIA02877: Jupiter in True and False Color
<h1>PIA02878: Jupiter Night and Day</h1><div class="PIA02878" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Day and night side narrow angle images taken on January 1, 2001 illustrating storms visible on the day side which are the sources of visible lightning when viewed on the night side. The images have been enhanced in contrast. Note the two day-side occurrences of high clouds, in the upper and lower parts of the image, are coincident with lightning storms seen on the darkside. The storms occur at 34.5 degrees and 23.5 degrees North latitude, within one degree of the latitudes at which similar lightning features were detected by the Galileo spacecraft. The images were taken at different times. The storms' longitudinal separation changes from one image to the next because the winds carrying them blow at different speeds at the two latitudes.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02878" onclick="window.open(this.href); return false;" title="Voir l'image PIA02878: Jupiter Night and Day sur le site de la NASA">Voir l'image PIA02878: Jupiter Night and Day sur le site de la NASA.</a></div>
PIA02878: Jupiter Night and Day
<h1>PIA02879: A New Year for Jupiter and Io</h1><div class="PIA02879" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The Galilean satellite Io floats above the cloudtops of Jupiter in this image captured on the dawn of the new millennium, January 1, 2001 10:00 UTC (spacecraft time), two days after Cassini's closest approach. The image is deceiving: there are 350,000 kilometers -- roughly 2.5 Jupiters -- between Io and Jupiter's clouds. Io is the size of our Moon, and Jupiter is very big.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02879" onclick="window.open(this.href); return false;" title="Voir l'image PIA02879: A New Year for Jupiter and Io sur le site de la NASA">Voir l'image PIA02879: A New Year for Jupiter and Io sur le site de la NASA.</a></div>
PIA02879: A New Year for Jupiter and Io
<h1>PIA02880: Polarized Light from Jupiter</h1><div class="PIA02880" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>These images taken through the wide angle camera near closest approach in the deep near-infrared methane band, combined with filters which sense electromagnetic radiation of orthogonal polarization, show that the light from the poles is polarized. That is, the poles appear bright in one image, and dark in the other. Polarized light is most readily scattered by aerosols. These images indicate that the aerosol particles at Jupiter's poles are small and likely consist of aggregates of even smaller particles, whereas the particles at the equator and covering the Great Red Spot are larger. Images like these will allow scientists to ascertain the distribution, size and shape of aerosols, and consequently, the distribution of heat, in Jupiter's atmosphere.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02880" onclick="window.open(this.href); return false;" title="Voir l'image PIA02880: Polarized Light from Jupiter sur le site de la NASA">Voir l'image PIA02880: Polarized Light from Jupiter sur le site de la NASA.</a></div>
PIA02880: Polarized Light from Jupiter
<h1>PIA02883: Jupiter Night-Side Auroras, North and South</h1><div class="PIA02883" lang="en" style="width:250px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Oval-shaped auroras glow in night-side areas near Jupiter's north and south poles in these images taken by NASA's Cassini spacecraft on Jan. 13, 2001. The lower frame is the first to capture the southern aurora on the planet's night side. Blue lines of longitude and latitude have been added in each frame to indicate position of the glows.<p>Jupiter's auroral ovals are similar to Earth's auroras, often called the northern lights or southern lights, although fluctuations in solar activity play a more important role in the auroras at Earth than at Jupiter. Energetic particles are constantly streaming towards Jupiter on magnetic field lines that intersect the planet's atmosphere on a ring around the magnetic pole. Where the energetic particles hit the upper atmosphere, they cause emission of light, similar to the glow in a fluorescent bulb. In the north (upper image), the magnetic pole is offset from the rotational pole, which is where the blue longitude lines converge, just to the left of the imaged area. The auroral oval appears like a draped necklace that is carried around by the rotation of the planet. In the south (lower image), the magnetic and rotational poles are nearly coincident, so no significant offset is visible.<p>Cassini had passed its closest to Jupiter about two weeks before taking these pictures, so it was in position to see the night side of the planet. It was about 16.5 million kilometers (10.3 million miles) from the planet and about 2.5 degrees below the plane of Jupiter's equator. The smallest features visible are about 100 kilometers (about 60 miles) across. The images were taken by Cassini's narrow-band camera through a filter centered on a light-wave frequency at which hydrogen emits light when it is excited. They have been processed to remove scattered light from the overexposed sunlit crescent of the planet. Hydrogen is a major ingredient of Jupiter's atmosphere.<p>It is not understood why the auroral oval rings are so thin. Cassini images will help scientists figure out what brings about the narrow nature and other features of the auroras, such as the break in the northern oval visible in the upper image.<p>Cassini 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 mission for NASA's Office of Space Science, Washington, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02883" onclick="window.open(this.href); return false;" title="Voir l'image PIA02883: Jupiter Night-Side Auroras, North and South sur le site de la NASA">Voir l'image PIA02883: Jupiter Night-Side Auroras, North and South sur le site de la NASA.</a></div>
PIA02883: Jupiter Night-Side Auroras, North and South
<h1>PIA02972: Jupiter in Color, by Cassini</h1><div class="PIA02972" lang="en" style="width:717px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This color image of Jupiter was taken by the camera onboard NASA's Cassini spacecraft when it was 81.3 million kilometers (50.5 million miles) from the planet. It is composed of images taken in the blue, green, and red regions of the spectrum and is therefore close to the true color of Jupiter that one would see through an Earth-based telescope.<p>The image is remarkably similar to images taken by NASA's Voyager 1 and 2 spacecraft more than 21 years ago, illustrating the stability of Jupiter's weather patterns. The parallel dark and bright bands and many other large-scale features are quasi-permanent structures that survive despite the intense small-scale activity ongoing in the atmosphere. The longevity of the large-scale features is an intrinsic property of the atmospheric flows on a gaseous planet such as Jupiter, with no solid surface. Smaller features, such as those in the dark bands north and south of the equator, are observed to form and disappear in a few days.<p>Everything visible on the planet is a cloud. Unlike Earth, where only water condenses to form clouds, Jupiter has several cloud-forming substances in its atmosphere. The updrafts and downdrafts bring different mixtures of these substances up from below, leading to clouds of different colors. The bluish features just north of the equator are regions of reduced cloud cover, similar to the place where the Galileo atmospheric probe entered in 1995. They are called "hot spots" because the reduced cloud cover allows heat to escape from warmer, deeper levels in the atmosphere.<p>Jupiter's moon Europa is seen at the right, casting a shadow on the planet. Scientists believe Europa holds promise of a liquid ocean beneath its surface.<p>Cassini 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, Calif., manages the Cassini mission for NASA's Office of Space Science, Washington, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA02972" onclick="window.open(this.href); return false;" title="Voir l'image PIA02972: Jupiter in Color, by Cassini sur le site de la NASA">Voir l'image PIA02972: Jupiter in Color, by Cassini sur le site de la NASA.</a></div>
PIA02972: Jupiter in Color, by Cassini
<h1>PIA03000: Atmospheric Motion in Jupiter's Northern Hemisphere</h1><div class="PIA03000" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>True-color (left) and false-color (right) mosaics of Jupiter's northern hemisphere between 10 and 50 degrees latitude. Jupiter's atmospheric motions are controlled by alternating eastward and westward bands of air between Jupiter's equator and polar regions. The direction and speed of these bands influences the color and texture of the clouds seen in this mosaic. The high and thin clouds are represented by light blue, deep clouds are reddish, and high and thick clouds are white. A high haze overlying a clear, deep atmosphere is represented by dark purple. This image was taken by NASA's Galileo spacecraft on April 3, 1997 at a distance of 1.4 million kilometers (.86 million miles).<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA03000" onclick="window.open(this.href); return false;" title="Voir l'image PIA03000: Atmospheric Motion in Jupiter's Northern Hemisphere sur le site de la NASA">Voir l'image PIA03000: Atmospheric Motion in Jupiter's Northern Hemisphere sur le site de la NASA.</a></div>
PIA03000: Atmospheric Motion in Jupiter's Northern Hemisphere
<h1>PIA03155: Satellite Footprints Seen in Jupiter Aurora</h1><div class="PIA03155" lang="en" style="width:752px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This is a spectacular NASA Hubble Space Telescope close-up view of an electric-blue aurora that is eerily glowing one half billion miles away on the giant planet Jupiter. Auroras are curtains of light resulting from high-energy electrons racing along the planet's magnetic field into the upper atmosphere. The electrons excite atmospheric gases, causing them to glow. The image shows the main oval of the aurora, which is centered on the magnetic north pole, plus more diffuse emissions inside the polar cap.<p>Though the aurora resembles the same phenomenon that crowns Earth's polar regions, the Hubble image shows unique emissions from the magnetic "footprints" of three of Jupiter's largest moons. (These points are reached by following Jupiter's magnetic field from each satellite down to the planet).<p>Auroral footprints can be seen in this image from Io (along the lefthand limb), Ganymede (near the center), and Europa (just below and to the right of Ganymede's auroral footprint). These emissions, produced by electric currents generated by the satellites, flow along Jupiter's magnetic field, bouncing in and out of the upper atmosphere. They are unlike anything seen on Earth.<p>This ultraviolet image of Jupiter was taken with the Hubble Space Telescope Imaging Spectrograph (STIS) on November 26, 1998. In this ultraviolet view, the aurora stands out clearly, but Jupiter's cloud structure is masked by haze.<p>December 14, 2000 inaugurates an intensive two weeks of joint observation of Jupiter's aurora by Hubble and the Cassini spacecraft. Cassini will make its closest approach to Jupiter enroute to a July 2004 rendezvous with Saturn. A second campaign in January 2001 will consist of Hubble images of Jupiter's day-side aurora and Cassini images of Jupiter's night-side aurora, obtained just after Cassini has flown past Jupiter. The team will develop computer models that predict how the aurora operates, and this will yield new insights into the effects of the solar wind on the magnetic fields of planets.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA03155" onclick="window.open(this.href); return false;" title="Voir l'image PIA03155: Satellite Footprints Seen in Jupiter Aurora sur le site de la NASA">Voir l'image PIA03155: Satellite Footprints Seen in Jupiter Aurora sur le site de la NASA.</a></div>
PIA03155: Satellite Footprints Seen in Jupiter Aurora
<h1>PIA03451: Cassini's Farewell to Jupiter</h1><div class="PIA03451" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>On January 15, 2001, 17 days after it passed its closest approach to Jupiter, NASA's Cassini spacecraft looked back to see the giant planet as a thinning crescent.<p>This image is a color mosaic from that day, shot from a distance of 18.3 million kilometers (11.4 million miles). The smallest visible features are roughly 110 kilometers (70 miles) across. The solar phase angle, the angle from the spacecraft to the planet to the Sun, is 120 degrees.<p>A crescent Io, innermost of Jupiter's four large moons, appears to the left of Jupiter.<p>Cassini collected its last Jupiter images on March 22, 2001, as the spacecraft continued the final leg of its journey to a July 1, 2004, appointment with Saturn.<p>Cassini 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, Calif., manages Cassini for NASA's Office of Space Science, Washington, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA03451" onclick="window.open(this.href); return false;" title="Voir l'image PIA03451: Cassini's Farewell to Jupiter sur le site de la NASA">Voir l'image PIA03451: Cassini's Farewell to Jupiter sur le site de la NASA.</a></div>
PIA03451: Cassini's Farewell to Jupiter
<h1>PIA03474: Ultraviolet View Shows Jupiter's Stratosphere</h1><div class="PIA03474" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Wave patterns at high latitudes, plus the famous Great Red Spot, dominate a cylindrical map of Jupiter as observed by NASA's Cassini spacecraft in the ultraviolet region of the light spectrum.<p>Compared with familiar visible-light views of Jupiter, this image is missing lower-latitude horizontal stripes of dark and light bands of clouds. (See, for example, <a href="/catalog/PIA02867">PIA02867</a>.) Haze in Jupiter's upper atmosphere, or stratosphere, scatters and reflects ultraviolet wavelengths, but is transparent in the visible-light portion of the spectrum.<p>This map was assembled from images taken in late 2000 by Cassini's narrow-angle camera. The images were taken during the course of a single Jupiter rotation lasting about 10 hours. The result shows all 360 degrees of Jupiter's longitude. The top edge is at 60 degrees north latitude; the bottom at 60 degrees south latitude.<p>Cassini made its closest pass to Jupiter, about 10 million kilometers (6 million miles), on Dec. 30, 2000, and proceeded toward its ultimate destination at Saturn. For more information, see the Cassini Project home page, <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov</a> and the Cassini imaging team home page, <a href="http://ciclops.lpl.arizona.edu">http://ciclops.lpl.arizona.edu</a>. The imaging team is based at the Boulder, Colo., campus of the Southwest Research Institute.<p>Cassini 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 mission for NASA's Office of Space Science, Washington, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA03474" onclick="window.open(this.href); return false;" title="Voir l'image PIA03474: Ultraviolet View Shows Jupiter's Stratosphere sur le site de la NASA">Voir l'image PIA03474: Ultraviolet View Shows Jupiter's Stratosphere sur le site de la NASA.</a></div>
PIA03474: Ultraviolet View Shows Jupiter's Stratosphere
<h1>PIA04433: Jupiter Torus Diagram</h1><div class="PIA04433" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">A cut-away schematic of Jupiter's space environment shows magnetically trapped radiation ions (in red), the neutral gas torus of the volcanic moon Io (green) and the newly discovered neutral gas torus of the moon Europa (blue). The white lines represent magnetic field lines.<p>Energetic neutral atoms (ENA) are emitted from the Europa torus regions because of the interaction between the trapped ions and the neutral gases. The Magnetospheric Imaging Instrument on NASA's Cassini spacecraft imaged those energetic neutral atoms in early 2001 during Cassini's flyby of Jupiter. Energetic neutral atoms also come from Jupiter when radiation ions impinge onto Jupiter's upper atmosphere.<p>Cassini 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, Calif., manages Cassini for NASA's Office of Space Science, Washington, D.C.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04433" onclick="window.open(this.href); return false;" title="Voir l'image PIA04433: Jupiter Torus Diagram sur le site de la NASA">Voir l'image PIA04433: Jupiter Torus Diagram sur le site de la NASA.</a></div>
PIA04433: Jupiter Torus Diagram
<h1>PIA04866: Cassini Jupiter Portrait</h1><div class="PIA04866" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This true color mosaic of Jupiter was constructed from images taken by the narrow angle camera onboard NASA's Cassini spacecraft on December 29, 2000, during its closest approach to the giant planet at a distance of approximately 10 million kilometers (6.2 million miles).</p><p>It is the most detailed global color portrait of Jupiter ever produced; the smallest visible features are approximately 60 kilometers (37 miles) across. The mosaic is composed of 27 images: nine images were required to cover the entire planet in a tic-tac-toe pattern, and each of those locations was imaged in red, green, and blue to provide true color. Although Cassini's camera can see more colors than humans can, Jupiter's colors in this new view look very close to the way the human eye would see them.</p><p>Everything visible on the planet is a cloud. The parallel reddish-brown and white bands, the white ovals, and the large Great Red Spot persist over many years despite the intense turbulence visible in the atmosphere. The most energetic features are the small, bright clouds to the left of the Great Red Spot and in similar locations in the northern half of the planet. These clouds grow and disappear over a few days and generate lightning. Streaks form as clouds are sheared apart by Jupiter's intense jet streams that run parallel to the colored bands. The prominent dark band in the northern half of the planet is the location of Jupiter's fastest jet stream, with eastward winds of 480 kilometers (300 miles) per hour. Jupiter's diameter is eleven times that of Earth, so the smallest storms on this mosaic are comparable in size to the largest hurricanes on Earth.</p><p>Unlike Earth, where only water condenses to form clouds, Jupiter's clouds are made of ammonia, hydrogen sulfide, and water. The updrafts and downdrafts bring different mixtures of these substances up from below, leading to clouds at different heights. The brown and orange colors may be due to trace chemicals dredged up from deeper levels of the atmosphere, or they may be byproducts of chemical reactions driven by ultraviolet light from the Sun. Bluish areas, such as the small features just north and south of the equator, are areas of reduced cloud cover, where one can see deeper.</p><p>For more information, see the Cassini Project home page, <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>. The imaging team is based at the Space Science Institute, Boulder, Colo.</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 mission for NASA's Office of Space Science, Washington, D.C. </p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04866" onclick="window.open(this.href); return false;" title="Voir l'image PIA04866: Cassini Jupiter Portrait sur le site de la NASA">Voir l'image PIA04866: Cassini Jupiter Portrait sur le site de la NASA.</a></div>
PIA04866: Cassini Jupiter Portrait
<h1>PIA07782: Cassini's Best Maps of Jupiter (Cylindrical Map)</h1><div class="PIA07782" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA07782_fig1.jpg"></a><a href="/figures/PIA07782_fig2.jpg"></a>Cylindrical Map without GridCylindrical Map with Grid</p><p>This map is part of a group release of cylindrical and polar stereographic projections of Jupiter. For the other maps see <a href="/catalog/PIA07783">PIA07783</a> and <a href="/catalog/PIA07784">PIA07784</a>.</p><p>These color maps of Jupiter were constructed from images taken by the narrow-angle camera onboard NASA's Cassini spacecraft on Dec. 11 and 12, 2000, as the spacecraft neared Jupiter during its flyby of the giant planet. Cassini was on its way to Saturn. They are the most detailed global color maps of Jupiter ever produced. The smallest visible features are about 120 kilometers (75 miles) across.</p><p>The maps are composed of 36 images: a pair of images covering Jupiter's northern and southern hemispheres was acquired in two colors every hour for nine hours as Jupiter rotated beneath the spacecraft. Although the raw images are in just two colors, 750 nanometers (near-infrared) and 451 nanometers (blue), the map's colors are close to those the human eye would see when gazing at Jupiter.</p><p>The maps show a variety of colorful cloud features, including parallel reddish-brown and white bands, the Great Red Spot, multi-lobed chaotic regions, white ovals and many small vortices. Many clouds appear in streaks and waves due to continual stretching and folding by Jupiter's winds and turbulence. The bluish-gray features along the north edge of the central bright band are equatorial "hot spots," meteorological systems such as the one entered by NASA's Galileo probe. Small bright spots within the orange band north of the equator are lightning-bearing thunderstorms. The polar regions are less clearly visible because Cassini viewed them at an angle and through thicker atmospheric haze (such as the whitish material in the south polar map -- see <a href="/catalog/PIA07784">PIA07784</a>.</p><p>Pixels in the rectangular map cover equal increments of planetocentric latitude (which is measured relative to the center of the planet) and longitude, and extend to 180 degrees of latitude and 360 degrees of longitude.</p><p>The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA07782" onclick="window.open(this.href); return false;" title="Voir l'image PIA07782: Cassini's Best Maps of Jupiter (Cylindrical Map) sur le site de la NASA">Voir l'image PIA07782: Cassini's Best Maps of Jupiter (Cylindrical Map) sur le site de la NASA.</a></div>
PIA07782: Cassini's Best Maps of Jupiter (Cylindrical Map)
<h1>PIA07783: Cassini's Best Maps of Jupiter (North Polar Map)</h1><div class="PIA07783" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA07783_fig1.jpg"></a><a href="/figures/PIA07783_fig2.jpg"></a>North Polar without GridNorth Polar with Grid</p><p>This map is part of a group release of cylindrical and polar stereographic projections of Jupiter. For the other maps see <a href="/catalog/PIA07782">PIA07782</a> and <a href="/catalog/PIA07784">PIA07784</a>.</p><p>These color maps of Jupiter were constructed from images taken by the narrow-angle camera onboard NASA's Cassini spacecraft on Dec. 11 and 12, 2000, as the spacecraft neared Jupiter during its flyby of the giant planet. Cassini was on its way to Saturn. They are the most detailed global color maps of Jupiter ever produced. The smallest visible features are about 120 kilometers (75 miles) across.</p><p>The maps are composed of 36 images: a pair of images covering Jupiter's northern and southern hemispheres was acquired in two colors every hour for nine hours as Jupiter rotated beneath the spacecraft. Although the raw images are in just two colors, 750 nanometers (near-infrared) and 451 nanometers (blue), the map's colors are close to those the human eye would see when gazing at Jupiter.</p><p>The maps show a variety of colorful cloud features, including parallel reddish-brown and white bands, the Great Red Spot, multi-lobed chaotic regions, white ovals and many small vortices. Many clouds appear in streaks and waves due to continual stretching and folding by Jupiter's winds and turbulence. The bluish-gray features along the north edge of the central bright band are equatorial "hot spots," meteorological systems such as the one entered by NASA's Galileo probe. Small bright spots within the orange band north of the equator are lightning-bearing thunderstorms. The polar regions are less clearly visible because Cassini viewed them at an angle and through thicker atmospheric haze (such as the whitish material in the south polar map -- see <a href="/catalog/PIA07784">PIA07784</a>.</p><p>Pixels in the rectangular map cover equal increments of planetocentric latitude (which is measured relative to the center of the planet) and longitude, and extend to 180 degrees of latitude and 360 degrees of longitude.</p><p>The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA07783" onclick="window.open(this.href); return false;" title="Voir l'image PIA07783: Cassini's Best Maps of Jupiter (North Polar Map) sur le site de la NASA">Voir l'image PIA07783: Cassini's Best Maps of Jupiter (North Polar Map) sur le site de la NASA.</a></div>
PIA07783: Cassini's Best Maps of Jupiter (North Polar Map)
<h1>PIA07784: Cassini's Best Maps of Jupiter (South Polar Map)</h1><div class="PIA07784" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA07784_fig1.jpg"></a><a href="/figures/PIA07784_fig2.jpg"></a>South Polar without GridSouth Polar with Grid</p><p>These color maps of Jupiter were constructed from images taken by the narrow-angle camera onboard NASA's Cassini spacecraft on Dec. 11 and 12, 2000, as the spacecraft neared Jupiter during its flyby of the giant planet. Cassini was on its way to Saturn. They are the most detailed global color maps of Jupiter ever produced; the smallest visible features are about 120 kilometers (75 miles) across. For other maps see <a href="/catalog/PIA07782">PIA07782</a> and <a href="/catalog/PIA07783">PIA07783</a>.</p><p>The maps are composed of 36 images: a pair of images covering Jupiter's northern and southern hemispheres was acquired in two colors every hour for nine hours as Jupiter rotated beneath the spacecraft. Although the raw images are in just two colors, 750 nanometers (near-infrared) and 451 nanometers (blue), the map's colors are close to those the human eye would see when gazing at Jupiter.</p><p>The maps show a variety of colorful cloud features, including parallel reddish-brown and white bands, the Great Red Spot, multi-lobed chaotic regions, white ovals and many small vortices. Many clouds appear in streaks and waves due to continual stretching and folding by Jupiter's winds and turbulence. The bluish-gray features along the north edge of the central bright band are equatorial "hot spots," meteorological systems such as the one entered by NASA's Galileo probe. Small bright spots within the orange band north of the equator are lightning-bearing thunderstorms. The polar regions shown here are less clearly visible because Cassini viewed them at an angle and through thicker atmospheric haze.</p><p>The round maps are polar stereographic projections that show the north or south pole in the center of the map and the equator at the edge.</p><p>The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA07784" onclick="window.open(this.href); return false;" title="Voir l'image PIA07784: Cassini's Best Maps of Jupiter (South Polar Map) sur le site de la NASA">Voir l'image PIA07784: Cassini's Best Maps of Jupiter (South Polar Map) sur le site de la NASA.</a></div>
PIA07784: Cassini's Best Maps of Jupiter (South Polar Map)
<h1>PIA08899: Hello Again, Jupiter!</h1><div class="PIA08899" lang="en" style="width:336px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The brick red, white and brown cloud bands of Jupiter are seen here from Saturn orbit. The Cassini spacecraft's powerful imaging cameras were specially designed to photograph nearby bodies (cosmically speaking) in the Saturn system, but as this image demonstrates, the cameras are actually telescopes.</p><p>Jupiter is imaged here from more than 11 times the distance between Earth and the Sun, or slightly farther than the average Earth-Saturn distance. As demonstrated by <a href="/catalog/PIA08324">PIA08324</a>, Earth is only about a pixel across when viewed from Saturn by Cassini.</p><p>Cassini's parting glance at Jupiter, following the spacecraft's 2000 flyby and gravity assist, is <a href="/catalog/PIA03451">PIA03451</a>.</p><p>Images taken using red, green and blue spectral filters were combined to create this natural color view. The images were taken with the Cassini spacecraft narrow-angle camera on Feb. 8, 2007 at a distance of approximately 1.8 billion kilometers (1.1 billion miles) from Jupiter and at a Sun-Jupiter-spacecraft, or phase, angle of 50 degrees. Scale in the original image was about 10,000 kilometers (6,000 miles) per pixel. The image was contrast enhanced and magnified by a factor of two and a half to enhance the visibility of cloud features on the planet.</p><p>The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo.</p><p>For more information about the Cassini-Huygens mission visit <a href="http://saturn.jpl.nasa.gov">http://saturn.jpl.nasa.gov/home/index.cfm</a>. The Cassini imaging team homepage is at <a href="http://ciclops.org">http://ciclops.org</a>.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA08899" onclick="window.open(this.href); return false;" title="Voir l'image PIA08899: Hello Again, Jupiter! sur le site de la NASA">Voir l'image PIA08899: Hello Again, Jupiter! sur le site de la NASA.</a></div>
PIA08899: Hello Again, Jupiter!
<h1>PIA09231: Jupiter Ahoy!</h1><div class="PIA09231" lang="en" style="width:256px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA09231_fig1.jpg"></a><br />Annotated Version</p><p>The Long Range Reconnaissance Imager (LORRI) on NASA's New Horizons spacecraft took this photo of Jupiter on Sept. 4, 2006, from a distance of 291 million kilometers (nearly 181 million miles) away. </p><p>Visible in the image are belts, zones and large storms in Jupiter's atmosphere, as well as the Jovian moons Europa (at left) and Io and the shadows they cast on Jupiter.</p><p>LORRI snapped this image during a test sequence to help prepare for the Jupiter encounter observations. It was taken close to solar opposition, meaning that the Sun was almost directly behind the camera when it spied Jupiter. This makes Jupiter appear about 40 times brighter than Pluto will be for LORRI's primary observations when New Horizons encounters the Pluto system in 2015. </p><p>To avoid saturation, the camera's exposure time was kept to 6 milliseconds. This image was, in part, a test to see how well LORRI would operate with such a short exposure time.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA09231" onclick="window.open(this.href); return false;" title="Voir l'image PIA09231: Jupiter Ahoy! sur le site de la NASA">Voir l'image PIA09231: Jupiter Ahoy! sur le site de la NASA.</a></div>
PIA09231: Jupiter Ahoy!
<h1>PIA09235: On Approach: Jupiter and Io</h1><div class="PIA09235" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><a href="/archive/PIA09235.mpg"></a><br />Click on the image for movie of<br />On Approach: Jupiter and Io</p><p>This sequence of images was taken on Jan. 8, 2007, with the New Horizons Long Range Reconnaissance Imager (LORRI), while the spacecraft was about 81 million kilometers (about 50 million miles) from Jupiter. Jupiter's volcanic moon Io is to the right; the planet's Great Red Spot is also visible. The image was one of 11 taken during the Jan. 8 approach sequence, which signaled the opening of the New Horizons Jupiter encounter. </p><p>Even in these early approach images, Jupiter shows different face than what previous visiting spacecraft -- such as Voyager 1, Galileo and Cassini -- have seen. Regions around the equator and in the southern tropical latitudes seem remarkably calm, even in the typically turbulent "wake" behind the Great Red Spot. </p><p>The New Horizons science team will scrutinize these major meteorological features -- including the unexpectedly calm regions -- to understand the diverse variety of dynamical processes on the solar system's largest planet. These include the newly formed Little Red Spot, the Great Red Spot and a variety of zonal features.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA09235" onclick="window.open(this.href); return false;" title="Voir l'image PIA09235: On Approach: Jupiter and Io sur le site de la NASA">Voir l'image PIA09235: On Approach: Jupiter and Io sur le site de la NASA.</a></div>
PIA09235: On Approach: Jupiter and Io
<h1>PIA09236: A Day on Jupiter (Animation)</h1><div class="PIA09236" lang="en" style="width:438px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>This "movie" strings 11 images of Jupiter captured by the New Horizons Long Range Reconnaissance Imager (LORRI) on January 9, 2007, when the spacecraft was about 80 million kilometers (49.6 million miles) from the giant planet. The sequence covers a full 10-hour rotation of Jupiter, during which the moons Ganymede and Io -- as well as the shadows they cast on Jupiter -- move across the camera's field of view.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA09236" onclick="window.open(this.href); return false;" title="Voir l'image PIA09236: A Day on Jupiter (Animation) sur le site de la NASA">Voir l'image PIA09236: A Day on Jupiter (Animation) sur le site de la NASA.</a></div>
PIA09236: A Day on Jupiter (Animation)
<h1>PIA09237: Ganymede's Shadow</h1><div class="PIA09237" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The New Horizons Long Range Reconnaissance Imager (LORRI) took this photo of Jupiter at 20:42:01 UTC on January 9, 2007, when the spacecraft was 80 million kilometers (49.6 million miles) from the giant planet. The volcanic moon Io is to the left of the planet; the shadow of the icy moon Ganymede moves across Jupiter's northern hemisphere.</p><p>Ganymede's average orbit distance from Jupiter is about 1 million kilometers (620,000 miles); Io's is 422,000 kilometers (262,000 miles). Both Io and Ganymede are larger than Earth's moon; Ganymede is larger than the planet Mercury. </p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA09237" onclick="window.open(this.href); return false;" title="Voir l'image PIA09237: Ganymede's Shadow sur le site de la NASA">Voir l'image PIA09237: Ganymede's Shadow sur le site de la NASA.</a></div>
PIA09237: Ganymede's Shadow
<h1>PIA09238: Moons around Jupiter</h1><div class="PIA09238" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The New Horizons Long Range Reconnaissance Imager (LORRI) took this photo of Jupiter at 20:42:01 UTC on January 9, 2007, when the spacecraft was 80 million kilometers (49.6 million miles) from the giant planet. The volcanic moon Io is to the left of the planet; the shadow of the icy moon Ganymede moves across Jupiter's northern hemisphere.</p><p>Ganymede's average orbit distance from Jupiter is about 1 million kilometers (620,000 miles); Io's is 422,000 kilometers (262,000 miles). Both Io and Ganymede are larger than Earth's moon; Ganymede is larger than the planet Mercury.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA09238" onclick="window.open(this.href); return false;" title="Voir l'image PIA09238: Moons around Jupiter sur le site de la NASA">Voir l'image PIA09238: Moons around Jupiter sur le site de la NASA.</a></div>
PIA09238: Moons around Jupiter
<h1>PIA09239: Io and Ganymede</h1><div class="PIA09239" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The New Horizons Long Range Reconnaissance Imager (LORRI) took this 4-millisecond exposure of Jupiter and two of its moons at 01:41:04 UTC on January 17, 2007. The spacecraft was 68.5 million kilometers (42.5 million miles) from Jupiter, closing in on the giant planet at 41,500 miles (66,790 kilometers) per hour. The volcanic moon Io is the closest planet to the right of Jupiter; the icy moon Ganymede is to Io's right. The shadows of each satellite are visible atop Jupiter's clouds; Ganymede's shadow is draped over Jupiter's northwestern limb. </p><p>Ganymede's average orbit distance from Jupiter is about 1.07 million kilometers (620,000 miles); Io's is 422,000 kilometers (262,000 miles). Both Io and Ganymede are larger than Earth's moon; Ganymede is larger than the planet Mercury. </p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA09239" onclick="window.open(this.href); return false;" title="Voir l'image PIA09239: Io and Ganymede sur le site de la NASA">Voir l'image PIA09239: Io and Ganymede sur le site de la NASA.</a></div>
PIA09239: Io and Ganymede
<h1>PIA09240: Storms and Moons</h1><div class="PIA09240" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>The New Horizons Long Range Reconnaissance Imager (LORRI) took this 2-millisecond exposure of Jupiter at 04:41:04 UTC on January 24, 2007. The spacecraft was 57 million kilometers (35.3 million miles) from Jupiter, closing in on the giant planet at 41,500 miles (66,790 kilometers) per hour. At right are the moons Io (bottom) and Ganymede; Ganymede's shadow creeps toward the top of Jupiter's northern hemisphere. </p><p>Two of Jupiter's largest storms are visible; the Great Red Spot on the western (left) limb of the planet, trailing the Little Red Spot on the eastern limb, at slightly lower latitude. The Great Red Spot is a 300-year old storm more than twice the size of Earth. The Little Red Spot, which formed over the past decade from the merging of three smaller storms, is about half the size of its older and "greater" counterpart. </p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA09240" onclick="window.open(this.href); return false;" title="Voir l'image PIA09240: Storms and Moons sur le site de la NASA">Voir l'image PIA09240: Storms and Moons sur le site de la NASA.</a></div>
PIA09240: Storms and Moons