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Add Image to Favorite List 2000-05-31 Io Galileo
Near Infrared Mapping Spectrometer
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Changes in the volcanoes on Jupiter's moon Io can be seen in these three views, taken by NASA's Galileo spacecraft during its three flybys of Io in October 1999, November 1999 and February 2000.
PIA02558:
Myriad of Hot Spots on Io
Full Resolution:     TIFF (56.56 kB)     JPEG (27.49 kB)
Add Image to Favorite List 2000-10-26 Io Galileo
Solid-State Imaging
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This mosaic of images acquired by NASA's Galileo spacecraft on February 22, 2000, shows the highest resolution view ever obtained of the surface of Jupiter's volcanic moon Io, 5 to 6 meters (16 to 20 feet) per picture element.
PIA02562:
Very High Resolution View of Io's Surface
Full Resolution:     TIFF (292 kB)     JPEG (137.4 kB)
Add Image to Favorite List 2002-05-28 Io Galileo
Near Infrared Mapping Spectrometer
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The Amirani lava flow on Jupiter's moon Io appears to be made up of many individual flows; the newest flows are the brightest spots in this infrared image from NASA's Galileo spacecraft.
PIA03533:
Amirani Lava Flow on Io
Full Resolution:     TIFF (606.9 kB)     JPEG (34.96 kB)
Add Image to Favorite List 2007-10-16 Io New Horizons
LEISA
MVIC
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This beautiful image of the crescents of volcanic Io and more sedate Europa is a combination of two New Horizons images taken March 2, 2007, about two days after New Horizons made its closest approach to Jupiter.
PIA10103:
Io and Europa Meet Again
Full Resolution:     TIFF (1.074 MB)     JPEG (9.716 kB)
Add Image to Favorite List 1998-12-05 Io Voyager
VG ISS - Narrow Angle
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This picture shows a special color reconstruction of one of the erupting volcanos on Io discovered by NASA's Voyager 1 during its encounter with Jupiter on the 4th and 5th of March, 1979.
PIA01368:
Jupiter's Moon Io
Full Resolution:     TIFF (736.2 kB)     JPEG (138.3 kB)
Add Image to Favorite List 2007-10-09 Io New Horizons
LORRI
Ultraviolet Light
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The Tvashtar plume on Io, seen by the Hubble Space Telescope (HST) and by New Horizons.
PIA10101:
Tvashtar Montage
Full Resolution:     TIFF (1.09 MB)     JPEG (63.22 kB)
Add Image to Favorite List 1999-10-08 Io Galileo
Solid-State Imaging
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Dramatic changes have occurred at the volcanically active Pillan Patera region of Jupiter's moon Io over the past three years, as seen in this set of three images taken by NASAšs Galileo spacecraft.
PIA02501:
Changes at Pillan Patera
Full Resolution:     TIFF (1.087 MB)     JPEG (39.87 kB)
Add Image to Favorite List 2000-05-31 Io Galileo
Solid-State Imaging
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This image from NASA's Galileo spacecraft shows one of many mountains on Jupiter's moon Io. The image was made by combining a recent high-resolution, black and white image with earlier low-resolution color data to provide a high-resolution, color view.
PIA02554:
Colorized View of Zal Region, Io
Full Resolution:     TIFF (564.4 kB)     JPEG (39.15 kB)
Add Image to Favorite List 2000-05-18 Io Galileo
Near Infrared Mapping Spectrometer
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This is the first-ever map of temperatures over large areas of Io's night-side, obtained with the photopolarimeter-radiometer instrument onboard NASA's Galileo spacecraft during flybys of Io in November 1999 and February 2000.
PIA02548:
Temperature Map of Io's Night Side
Full Resolution:     TIFF (924.6 kB)     JPEG (82.66 kB)
Add Image to Favorite List 2002-05-28 Io Galileo
Solid-State Imaging
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This mosaic of Tvashtar Catena on Jupiter's moon Io, taken by NASA's Galileo spacecraft on Oct. 16, 2001, completes a series of views depicting changes in the region over a period of nearly two years. A catena is a chain of volcanic craters.
PIA03529:
Galileo's Last View of Tvashtar, Io
Full Resolution:     TIFF (381.9 kB)     JPEG (149.2 kB)
Add Image to Favorite List 1998-10-13 Io Galileo
Solid-State Imaging
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Views of Jupiter's moon Io in the eclipse of the large planet's shadow are color coded so blue to yellow to red represents increasing brightness. Image from NASA's Galileo spacecraft indicate that the lava at Pillan Patera exceeded 1,700 degrees kelvin.
PIA01635:
Io in Eclipse reveals High Temperature Hot Spots
Full Resolution:     TIFF (323.3 kB)     JPEG (59.78 kB)
Add Image to Favorite List 2000-10-26 Io Galileo
Solid-State Imaging
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This mosaic combines images collected in February 2000 and the summer of 1999 by NASA's Galileo spacecraft to highlight new details of the longest active lava flow known in the solar system.
PIA02567:
Giant Lava Flow on Io, in Color
Full Resolution:     TIFF (1.187 MB)     JPEG (44.4 kB)
Add Image to Favorite List 1999-01-18 Io Galileo
Solid-State Imaging
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These views of the key volcanic centers on Jupiter's moon, Io, merge color data with higher resolution mosaics. Images were obtained with the green, violet, and 756 micrometer filters of the Solid State Imaging (SSI) system on NASA's Galileo spacecraft.
PIA01668:
Key Volcanic Centers on Io
Full Resolution:     TIFF (884.3 kB)     JPEG (56.36 kB)
Add Image to Favorite List 1999-10-08 Io Galileo
Solid-State Imaging
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A volcano named Zamama on Jupiter's moon Io has recently changed in appearance as seen in this pair of images of Io acquired by NASA's Galileo spacecraft as it approached Io in preparation for a close flyby.
PIA02504:
Close-up of Zamama, Io (Color)
Full Resolution:     TIFF (948.9 kB)     JPEG (32.3 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Solid-State Imaging
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The images used to create this enhanced color composite of Io were acquired by NASA's Galileo spacecraft during its seventh orbit (G7) of Jupiter. Low sun angles near the terminator offer lighting conditions which emphasize the topography on volcanic Io.
PIA00738:
Topography and Volcanoes on Io (color)
Full Resolution:     TIFF (1.08 MB)     JPEG (47.47 kB)
Add Image to Favorite List 2002-05-28 Io Galileo
Solid-State Imaging
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The source area of what had been a towering volcanic plume two months earlier lies in the far-right frame of this mosaic of images taken of Jupiter's moon Io by NASA's Galileo spacecraft on Oct. 16, 2001.
PIA03531:
New plume vent near Zamama, Io
Full Resolution:     TIFF (197.7 kB)     JPEG (71.94 kB)
Add Image to Favorite List 2002-05-28 Io Galileo
Solid-State Imaging
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Scientists pointed NASA's Galileo spacecraft camera at the Tohil region of Jupiter's moon Io to investigate the curious relationship between Io's mountains and its volcanoes.
PIA03527:
Detailed View of Mountain and Craters at Tohil, Io
Full Resolution:     TIFF (227.7 kB)     JPEG (98.12 kB)
Add Image to Favorite List 2002-05-28 Io Galileo
Solid-State Imaging
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These images of an area called Telegonus Mensa on Jupiter's moon Io, taken by NASA's Galileo spacecraft on Oct. 16, 2001, reveal a complex interplay of geologic processes.
PIA03528:
Collapsing Cliff at Telegonus Mensa, Io
Full Resolution:     TIFF (301.6 kB)     JPEG (105 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Solid-State Imaging
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This color composite of Io was acquired by NASA's Galileo spacecraft during its sixth orbit (E6) of Jupiter as part of a sequence of images designed to monitor changes in the surface color due to volcanic activity.
PIA01223:
Changes on Io's Loki-Pele hemisphere
Full Resolution:     TIFF (1.15 MB)     JPEG (38.67 kB)
Add Image to Favorite List 1999-08-31 Io Voyager
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This photograph of Jupiter's satellite Io taken by NASA's Voyager 1 shows what appears to be a volcanic caldera that is venting gasses (the bright blue patch at left center).
PIA00021:
Volcanic Caldera on Io
Full Resolution:     TIFF (1.235 MB)     JPEG (42.41 kB)
Add Image to Favorite List 2002-12-06 Io Galileo
Solid-State Imaging
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This image taken by NASA's Galileo spacecraft reveals fresh lava in a wide pit named Gish Bar Patera on Jupiter's moon Io. The patera, or depression, is quite large: 106.3 kilometers (66 miles) by 115.0 kilometers (71 miles).
PIA03884:
Recent Eruption at Gish Bar Patera on Io
Full Resolution:     TIFF (985.7 kB)     JPEG (145.8 kB)
Add Image to Favorite List 1999-08-31 Io Voyager
VG ISS - Narrow Angle
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This color picture of Io, Jupiter's innermost Galilean satellite, was taken by NASA's Voyager 1 on the morning of March 5, 1979 at a range of 128,500 kilometers (77,100 miles).
PIA00361:
Io Surface Deposits and Volcano
Full Resolution:     TIFF (1.38 MB)     JPEG (49.09 kB)
Add Image to Favorite List 1999-12-17 Io Galileo
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Like a terrestrial weather map, this map made by the photopolarimeter-radiometer onboard NASA's Galileo spacecraft shows how temperatures vary across the surface of Jupiter's moon Io. In this case temperatures are due to volcanic activity, not weather.
PIA02524:
Galileo PPR Temperature Maps of Loki in October 1999
Full Resolution:     TIFF (140.3 kB)     JPEG (61.33 kB)
Add Image to Favorite List 1999-12-17 Io Galileo
Solid-State Imaging
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This mosaic of images collected by NASA's Galileo spacecraft on Thanksgiving Day, November 25, 1999 shows a fountain of lava spewing above the surface of Jupiter's moon Io.
PIA02525:
Interpreted Lava Fountains on Io
Full Resolution:     TIFF (1.3 MB)     JPEG (124.8 kB)
Add Image to Favorite List 2002-05-28 Io Galileo
Near Infrared Mapping Spectrometer
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Nine previously unknown volcanoes have been discovered from this infrared image of Jupiter's moon Io, acquired by NASA's Galileo spacecraft on Oct. 16, 2001.
PIA03534:
Io in Infrared with Giant Plume's New Hot Spot
Full Resolution:     TIFF (623.6 kB)     JPEG (59.13 kB)
Add Image to Favorite List 2002-05-28 Io Galileo
Near Infrared Mapping Spectrometer
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Hot eruption sites scattered across Jupiter's moon Io stand out dramatically in an infrared image taken Oct. 13, 2001, by NASA's Galileo spacecraft as it sped past this most volcanically active of all known worlds.
PIA03535:
Io in Infrared, Night and Day
Full Resolution:     TIFF (312.2 kB)     JPEG (36.39 kB)
Add Image to Favorite List 2001-11-27 Io Galileo
Solid-State Imaging
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Io's Pele Glowing in the Dark
PIA02596:
Io's Pele Glowing in the Dark
Full Resolution:     TIFF (471.9 kB)     JPEG (98.62 kB)
Add Image to Favorite List 2001-12-10 Io Galileo
Solid-State Imaging
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Wonderful colors in a volcanic crater named Tupan Patera on Jupiter's moon Io, as seen in this image from NASA's Galileo spacecraft, show varied results of lava interacting with sulfur-rich materials.
PIA02599:
Colorful Tupan Patera, Io
Full Resolution:     TIFF (1.55 MB)     JPEG (68.25 kB)
Add Image to Favorite List 1999-12-17 Io Galileo
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This false-color infrared image of the Sunlit disk of Jupiter's moon Io was taken at the NASA Infrared Telescope Facility at Mauna Kea, Hawaii, a few hours after a November 25, 1999 close Io flyby by NASA's Galileo spacecraft.
PIA02522:
Earth-Based Observations of a Fire Fountain on Io
Full Resolution:     TIFF (58.53 kB)     JPEG (12.82 kB)
Add Image to Favorite List 1998-07-02 Io Galileo
Solid-State Imaging
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This is the highest resolution color picture taken so far of Jupiter's volcanic moon Io by NASA's Galileo spacecraft. The fiery satellite is seen against a backdrop of Jupiter's cloud tops, which appear blue in this false-color composite.
PIA01604:
Close-up color view of Io
Full Resolution:     TIFF (1.769 MB)     JPEG (78.57 kB)
Add Image to Favorite List 2000-05-18 Io Galileo
Photopolarimeter-Radiometer
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This image depicts the discovery of sulfur gas in the plume of the Pele volcano on Jupiter's moon Io, as seen by the Hubble Space Telescope in October 1999, during a flyby of Io by NASA's Galileo spacecraft.
PIA02546:
Sulfur Gas in Pele's Plume
Full Resolution:     TIFF (544.7 kB)     JPEG (42.15 kB)
Add Image to Favorite List 1999-11-19 Io Galileo
Near Infrared Mapping Spectrometer
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This image is the highest-resolution thermal, or heat image, ever made of Amirani, a large volcano on Jupiter's moon Io. It was taken on Oct. 10, 1999, by NASA's Galileo spacecraft. Amirani is on the side of Io that permanently faces away from Jupiter.
PIA02516:
Galileo NIMS Observes Amirani
Full Resolution:     TIFF (274.2 kB)     JPEG (34.6 kB)
Add Image to Favorite List 1996-06-03 Io Voyager
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NASA's Voyager 1 image of Io showing active plume of Loki on limb. Heart-shaped feature southeast of Loki consists of fallout deposits from active plume Pele.
PIA00010:
Io with Loki Plume on Bright Limb
Full Resolution:     TIFF (1.65 MB)     JPEG (50.29 kB)
Add Image to Favorite List 2007-10-09 Io New Horizons
LEISA
LORRI
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New Horizons took this montage of images of Jupiter's volcanic moon Io, glowing in the dark of Jupiter's shadow, as the Pluto-bound spacecraft sped through the Jupiter system on Feb. 27, 2007.
PIA10100:
Io Eclipse Montage
Full Resolution:     TIFF (1.671 MB)     JPEG (106.4 kB)
Add Image to Favorite List 2000-10-26 Io Galileo
Solid-State Imaging
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Most of the 12 images in this mosaic were taken on February 22, 2000, by NASA's Galileo spacecraft. It has been merged with lower-resolution color data acquired by Galileo during the summer of 1999.
PIA02566:
Io's Chain of Craters
Full Resolution:     TIFF (1.389 MB)     JPEG (93.06 kB)
Add Image to Favorite List 1999-11-04 Io Galileo
Near Infrared Mapping Spectrometer
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The active volcano Prometheus on Jupiter's moon Io was imaged by NASA's Galileo spacecraft during the close flyby of Io on Oct.10, 1999. The spectrometer can detect active volcanoes on Io by measuring their heat in the near-infrared wavelengths.
PIA02509:
Galileo's Near-Infrared Mapping Spectrometer Detects Active Lava Flows at Prometheus Volcano, Io
Full Resolution:     TIFF (67.96 kB)     JPEG (35 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Near Infrared Mapping Spectrometer
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NASA's Galileo spacecraft's Near Infrared Mapping Spectrometer (NIMS) shows the distribution of volcanic hotspots on the surface of Io during the G! encounter on June 29, 1996.
PIA00835:
NIMS Observation of Hotspots on Io
Full Resolution:     TIFF (178 kB)     JPEG (74.71 kB)
Add Image to Favorite List 1997-09-08 Io Galileo
Solid-State Imaging
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The mottled face of Jupiter's volcanically active moon Io as viewed by NASA's Galileo spacecraft.
PIA00282:
Io - Full Disk Centered on Media Regio
Full Resolution:     TIFF (275.2 kB)     JPEG (15.88 kB)
Add Image to Favorite List 1998-06-04 Io Voyager
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Io's volcanic plains are shown in this image from NASA's Voyager 1 taken in 1998. Also visible are numerous volcanic calderas and two large mountains (Euboea Montes, just above 

center, and Haemus Montes, at lower left).
PIA00328:
Io, Showing Volcanic Plains and Mountains
Full Resolution:     TIFF (1.445 MB)     JPEG (51.48 kB)
Add Image to Favorite List 1997-09-07 Io Galileo
Solid-State Imaging
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Jupiter's moon Io with Pele prominently in view. The inset images are from NASA's Voyager 1. The Galileo image was
obtained by the imaging system on board the spacecraft in June, 1996.
PIA00718:
Io's Pele Hemisphere
Full Resolution:     TIFF (1.461 MB)     JPEG (45.62 kB)
Add Image to Favorite List 2000-04-19 Io Galileo
Solid-State Imaging
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Lava flows similar to those found in Hawaii are seen in the black and white image at top, taken by NASA's Galileo spacecraft. It is one of the highest resolution images ever obtained of Jupiter's volcanic moon Io.
PIA02533:
Highest Resolution of Lava Flows on Io
Full Resolution:     TIFF (1.276 MB)     JPEG (90.21 kB)
Add Image to Favorite List 2000-04-19 Io Galileo
Solid-State Imaging
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Volcanic calderas, lava flows and cliffs are seen in this false color image of a region near the south pole of Jupiter's volcanic moon Io, created by combining a black and white image taken by NASA's Galileo spacecraft with lower resolution color images.
PIA02534:
Terrain near Io's South Pole, in Color
Full Resolution:     TIFF (1.812 MB)     JPEG (84.44 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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The varied effects of Ionian volcanism can be seen in this false color infrared composite image of Io's trailing hemisphere. Color data from Galileo's first orbit have been combined with a higher resolution clear filter picture taken on the third orbit.
PIA01112:
Pele Plume Deposit on Io
Full Resolution:     TIFF (1.345 MB)     JPEG (66 kB)
Add Image to Favorite List 2000-05-18 Io Galileo
Solid-State Imaging
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Culann Patera, one of the most colorful volcanic centers on Io, is the centerpiece of this mosaic of the best high-resolution, color view of Io yet returned by NASA's Galileo spacecraft.
PIA02535:
Culann Patera, Io, in False Color
Full Resolution:     TIFF (2.192 MB)     JPEG (105.6 kB)
Add Image to Favorite List 1999-11-19 Io Galileo
Solid-State Imaging
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Unusual mountains on Jupiter's moon Io are shown in these images that were captured by NASA's Galileo spacecraft during its close Io flyby. The top four pictures show four different mountains at resolutions of about 500 meters per picture element.
PIA02513:
Collapsing Mountains on Io
Full Resolution:     TIFF (1.291 MB)     JPEG (251.9 kB)
Add Image to Favorite List 2000-05-31 Io Galileo
Near Infrared Mapping Spectrometer
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Pele, one of Io's best-known volcanoes, was observed by NASA's Galileo spacecraft, during the flyby of Jupiter's moon Io on February 22, 2000.
PIA02560:
Temperature Map of Pele, Io
Full Resolution:     TIFF (1.376 MB)     JPEG (57.62 kB)
Add Image to Favorite List 1997-11-18 Io Galileo
Solid-State Imaging
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Io, the most volcanic body in the solar system, is seen in front of Jupiter's cloudy atmosphere in this image taken Sept. 7, 1996, by NASA's Galileo spacecraft, now orbiting the giant planet.
PIA00494:
Io in front of Jupiter
Full Resolution:     TIFF (2.13 MB)     JPEG (88.84 kB)
Add Image to Favorite List 1999-11-19 Io Galileo
Solid-State Imaging
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Brightly glowing lava from the volcano Pele is seen in this image taken by NASA's Galileo spacecraft as it receded from its close flyby of Jupiter's moon Io in October, 1999.
PIA02510:
Pele's Glow
Full Resolution:     TIFF (1.391 MB)     JPEG (42.92 kB)
Add Image to Favorite List 2000-05-31 Io Galileo
Solid-State Imaging
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An active volcanic eruption on Jupiter's moon Io was captured in this image taken on February 22, 2000 by NASA's Galileo spacecraft. Tvashtar Catena, a chain of giant volcanic calderas, where an energetic eruption caught in action in November 1999.
PIA02550:
Ongoing Volcanic Eruption at Tvashtar Catena, Io
Full Resolution:     TIFF (2.248 MB)     JPEG (81.64 kB)
Add Image to Favorite List 1999-01-18 Io Galileo
Solid-State Imaging
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This global view of Jupiter's moon, Io, was obtained during the tenth orbit of Jupiter by NASA's Galileo spacecraft. Io, which is slightly larger than Earth's moon, is the most volcanically active body in the solar system.
PIA01667:
Io's Pele Hemisphere After Pillan Changes
Full Resolution:     TIFF (1.347 MB)     JPEG (56.68 kB)
Add Image to Favorite List 2000-03-06 Io Galileo
Solid-State Imaging
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The Zal Patera region of Jupiter's volcanic moon Io is shown in this combination of high-resolution black and white images taken by NASA's Galileo spacecraft on November 25, 1999 and lower resolution color images taken by Galileo on July 3, 1999.
PIA02527:
Zal Patera, Io, in color
Full Resolution:     TIFF (2.005 MB)     JPEG (75.34 kB)
Add Image to Favorite List 1998-03-06 Io Galileo
Solid-State Imaging
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These full disk views of Jupiter's volcanic moon, Io, use images which were acquired by NASA's Galileo spacecraft on Dec. 18, 1996, when Io, the spacecraft, and the sun were nearly all aligned (near zero degrees phase angle).
PIA00584:
Global View of Io in various colors
Full Resolution:     TIFF (1.641 MB)     JPEG (102.7 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Near Infrared Mapping Spectrometer
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On Feb. 21, 1997, the Galileo spacecraft observed Io in daylight from a range of approximately 703,000 km (440,000 miles). Loki Patera, historically the most active and persistent hot spot on Io, is located on the hemisphere of Io always facing Jupiter.
PIA00856:
NIMS Observes Increased Activity at Loki Patera, Io
Full Resolution:     TIFF (912.3 kB)     JPEG (40.86 kB)
Add Image to Favorite List 1999-11-19 Io Galileo
Solid-State Imaging
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The volcano Pele glows in the night in this close-up image of Jupiter's moon Io, obtained by NASA's Galileo spacecraft in the closest-ever Io flyby on October 10, 1999. Only surfaces hotter than 600 degrees Celsius are visible in this image.
PIA02511:
Pele's Hot Caldera Margin
Full Resolution:     TIFF (290.8 kB)     JPEG (44.06 kB)
Add Image to Favorite List 2001-10-04 Io Galileo
Near Infrared Mapping Spectrometer
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Volcanic hot spots, including a bright one never seen before, pepper an infrared color-coded image (left) of Jupiter's moon Io, taken by NASA's Galileo spacecraft on Aug. 6, 2001.
PIA02591:
Hot Spots on Io
Full Resolution:     TIFF (806.2 kB)     JPEG (73.93 kB)
Add Image to Favorite List 2001-06-22 Io Galileo
Photopolarimeter-Radiometer
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Powerful volcanoes and the previous day's sunshine warm the nighttime surface of Jupiter's moon Io, as seen in this image from NASA's Galileo spacecraft. The left-hand frame shows the best view that Galileo has yet provided of Io's nighttime temperatures.
PIA02589:
Io's Nighttime Heat
Full Resolution:     TIFF (1.384 MB)     JPEG (51.07 kB)
Add Image to Favorite List 2000-10-26 Io Galileo
Solid-State Imaging
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This composite of images, all acquired by NASA's Galileo spacecraft, contains three views at three different image resolutions of the volcano Prometheus on Jupiter's moon Io. The upper mosaic consists of eight high-resolution frames.
PIA02564:
Io's Prometheus Volcano at Various Resolutions
Full Resolution:     TIFF (739.5 kB)     JPEG (93.19 kB)
Add Image to Favorite List 2007-10-09 Io New Horizons
LEISA
LORRI
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A global map of Jupiter's moon Io derived from eight images taken by the Long Range Reconnaissance Imager (LORRI) on the New Horizons spacecraft, as it passed Jupiter on its way to Pluto in late February 2007.
PIA10099:
Changes on Io
Full Resolution:     TIFF (2.028 MB)     JPEG (81.55 kB)
Add Image to Favorite List 2000-10-26 Io Galileo
Solid-State Imaging
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Prometheus is the 'Old Faithful' of the many volcanoes on Jupiter's moon Io. A broad, umbrella-shaped plume of gas and dust has been spotted above Prometheus by NASA's Voyager and Galileo spacecraft every time the viewing conditions have been favorable.
PIA02565:
Sources of Volcanic Plumes Near Prometheus
Full Resolution:     TIFF (1.988 MB)     JPEG (98.6 kB)
Add Image to Favorite List 2000-05-18 Io Galileo
Solid-State Imaging
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NASA's Galileo spacecraft caught this volcanic eruption in action on Jupiter's moon Io on November 25, 1999. This mosaic shows Tvashtar Catena, a chain of calderas, in enhanced color.
PIA02545:
Eruption at Tvashtar Catena, Io, in Color
Full Resolution:     TIFF (1.946 MB)     JPEG (86.57 kB)
Add Image to Favorite List 1999-12-17 Io Galileo
Solid-State Imaging
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This image of Jupiter's moon Io, taken by NASA's Galileo spacecraft on November 25, 1999, shows a bright lava flow with a distinct dark channel in the middle.
PIA02518:
Bright Channelized Lava Flows on Io
Full Resolution:     TIFF (1.55 MB)     JPEG (115.7 kB)
Add Image to Favorite List 1999-03-13 Io Voyager
VG ISS - Narrow Angle
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This picture of Io, the innermost Galilean satellite, was taken by NASA's Voyager 1 on the morning of March 5, 1979 at a range of 377,000 kilometers (226,200 miles). The smallest features visible are about 10 kilometers (6 miles) across.
PIA01514:
Io Surface Deposits and Volcanic Craters
Full Resolution:     TIFF (2.1 MB)     JPEG (70.93 kB)
Add Image to Favorite List 2000-05-31 Io Galileo
Solid-State Imaging
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This stereo image illustrates the topography of the Tvashtar Catena region on Jupiter's moon Io. It was created by combining two different views of Tvashtar taken by NASA's Galileo spacecraft on November 25, 1999 and February 22, 2000.
PIA02552:
Stereo Image of Tvashtar Catena, Io
Full Resolution:     TIFF (1.615 MB)     JPEG (96.08 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Solid-State Imaging
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This color image, acquired during NASA's Galileo's ninth orbit around Jupiter, shows two volcanic plumes on Io. One plume was captured on the bright limb or edge of the moon, erupting over a caldera (volcanic depression) named Pillan Patera.
PIA00703:
Active Volcanic Plumes on Io
Full Resolution:     TIFF (817.7 kB)     JPEG (42.25 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Solid-State Imaging
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These images of Jupiter's volcanic moon, Io, show the results of a dramatic event that occurred on the fiery satellite during a five-month period (April 4-Sept 19, 1997.
PIA00744:
Arizona-sized Io Eruption
Full Resolution:     TIFF (2.063 MB)     JPEG (65.17 kB)
Add Image to Favorite List 2014-08-04 Io Gemini North Telescope
W. M. Keck Observatory
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These images show Jupiter's moon Io obtained at different infrared wavelengths with the W. M. Keck Observatory's 10-meter Keck II telescope on Aug. 15, 2013 (a-c), and the Gemini North telescope on Aug. 29, 2013 (d).
PIA18656:
Eruptions on Io
Full Resolution:     TIFF (2.431 MB)     JPEG (61.14 kB)
Add Image to Favorite List 2000-05-18 Io Galileo
Near Infrared Mapping Spectrometer
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This image compares temperatures at the volcano Loki, the most powerful volcano on Io, seen by the photopolarimeter-radiometer instrument onboard NASA's Galileo spacecraft during its October 1999 flyby of Jupiter's moon Io, and its February 2000 flyby.
PIA02549:
Temperature Comparison at Loki
Full Resolution:     TIFF (291.5 kB)     JPEG (133.3 kB)
Add Image to Favorite List 2001-02-26 Io Galileo
Solid-State Imaging
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This pair of images taken by NASA's Galileo spacecraft captures a dynamic eruption at Tvashtar Catena, a chain of volcanic bowls on Jupiter's moon Io. They show a change in the location of hot lava over a period of a few months in 1999 and early 2000.
PIA02584:
Eruption at Tvashtar Catena on Io
Full Resolution:     TIFF (1.901 MB)     JPEG (114.5 kB)
Add Image to Favorite List 2013-04-04 Io 963x913x3
This map shows predicted heat flow at the surface of Jupiter's moon Io from two tidal-heating models. Red indicates areas where more heat is expected; blue where less heat is expected.
PIA16941:
Io Predicted Heat Flow Map
Full Resolution:     TIFF (2.639 MB)     JPEG (126.6 kB)
Add Image to Favorite List 1997-11-18 Io Galileo
Solid-State Imaging
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Volcanoes on Jupiter's moon Io are compared in these images from NASA's Galileo spacecraft (right) taken in early September of this year, and from the Voyager spacecraft (left) taken in 1979.
PIA00495:
Changing volcanoes on Io
Full Resolution:     TIFF (2.377 MB)     JPEG (60.55 kB)
Add Image to Favorite List 2000-03-06 Io Galileo
Solid-State Imaging
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This picture of Jupiter's volcanic moon Io combines high-resolution black and white images taken by NASA's Galileo spacecraft on October 10, 1999, with lower resolution color images taken by Galileo on July 3, 1999.
PIA02526:
Ionian Mountains and Calderas, in Color
Full Resolution:     TIFF (3.203 MB)     JPEG (170.4 kB)
Add Image to Favorite List 2000-05-18 Io Galileo
Near Infrared Mapping Spectrometer
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Volcanic 'hot spots' are seen in this color temperature map of the Prometheus volcano on Jupiter's moon Io created with data obtained by NASA's Galileo and Voyager spacecraft.
PIA02542:
Prometheus/NIMS
Full Resolution:     TIFF (1.242 MB)     JPEG (29.71 kB)
Add Image to Favorite List 1999-11-19 Io Galileo
Near Infrared Mapping Spectrometer
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This image shows the region around the Prometheus volcano on Jupiter's moon Io. It was observed by NASA's Galileo spacecraft in 1996 as it was flying away from a close approach to Io.
PIA02515:
Io's Prometheus Regions as Viewed by Galileo NIMS
Full Resolution:     TIFF (870 kB)     JPEG (76.75 kB)
Add Image to Favorite List 2001-03-29 Io Cassini-Huygens
Galileo
Solid-State Imaging
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Two tall volcanic plumes and the rings of red material they have deposited onto surrounding surface areas appear in images taken of Jupiter's moon Io by NASA's Galileo and Cassini spacecraft in late December 2000 and early January 2001.
PIA02588:
Galileo and Cassini Image Two Giant Plumes on Io
Full Resolution:     TIFF (1.374 MB)     JPEG (96.56 kB)
Add Image to Favorite List 1996-01-29 Io Voyager
VG ISS - Narrow Angle
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This full-disk image of Jupiter's satellite Io was made from several frames taken by NASA's Voyager 1 on Mar. 4, 1979, as the spacecraft neared the satellite.
PIA00023:
Io - Full Disk
Full Resolution:     TIFF (1.21 MB)     JPEG (40.95 kB)
Add Image to Favorite List 1997-12-10 Io Galileo
Solid-State Imaging
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Shown here are color-coded images of Io in eclipse (top). The images were acquired by NASA's Galileo spacecraft during its tenth orbit around Jupiter.
PIA01094:
Io Degassing from sub- and anti-Jupiter Regions
Full Resolution:     TIFF (914.2 kB)     JPEG (101.9 kB)
Add Image to Favorite List 2000-05-18 Io Galileo
Photopolarimeter-Radiometer
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Ideas about the role of sulfur in volcanoes on Jupiter's moon Io are illustrated. Sulfur gas consisting of pairs of sulfur atoms (S2), detected above Io's volcano Pele by the Hubble Space Telescope, is ejected from the hot vents of Io's volcanoes.
PIA02547:
The Role of Sulfur in Io's Volcanoes
Full Resolution:     TIFF (1.611 MB)     JPEG (75.39 kB)
Add Image to Favorite List 1998-12-07 Io Galileo
Solid-State Imaging
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These four views of Jupiter's moon Io clearly show airborne plumes of gas and dust from two of Io's active volcanoes, Zamama and Prometheus. The bottom row consists of enlargements of the plume areas. Images captured by NASA's Galileo spacecraft.
PIA01652:
Sequence Showing Active Volcanic Plumes on Io
Full Resolution:     TIFF (2.093 MB)     JPEG (73 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Near Infrared Mapping Spectrometer
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Sulfur dioxide, normally a gas at room temperatures, is known to exist on Io's surface as a frost, condensing there from the hot gases emanating from the Io volcanoes. This image was taken in 1996 by NASA's Galileo spacecraft.
PIA00841:
Distribution of Sulfur Dioxide Frost on Io
Full Resolution:     TIFF (173.2 kB)     JPEG (60.06 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Near Infrared Mapping Spectrometer
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NASA's Galileo spacecraft obtained this image of half of Io's disk in darkness on Sept. 19, 1997.
PIA01226:
Two New Hot Spots on Io
Full Resolution:     TIFF (307.3 kB)     JPEG (67.14 kB)
Add Image to Favorite List 1998-05-08 Io Galileo
Solid-State Imaging
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This composite includes the four largest moons of Jupiter which are known as the Galilean satellites. Shown from left to right are Io, closest to Jupiter, followed by Europa, Ganymede, and Callisto.
PIA01299:
The Galilean Satellites
Full Resolution:     TIFF (2.132 MB)     JPEG (156.4 kB)
Add Image to Favorite List 1998-05-08 Io Galileo
Solid-State Imaging
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In this family portrait the four largest moons of Jupiter are shown to scale in increasing distance from Jupiter are (left to right) Io, Europa, Ganymede, and Callisto. This image was taken by NASA's Galileo in November, 1997.
PIA01400:
The Galilean Satellites
Full Resolution:     TIFF (2.237 MB)     JPEG (134.9 kB)
Add Image to Favorite List 2000-05-18 Io Galileo
Near Infrared Mapping Spectrometer
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This image of Loki Patera on Jupiter's volcanic moon Io shows data taken by the near-infrared mapping spectrometer onboard NASA's Galileo spacecraft during its Io flyby on Oct. 10, 1999.
PIA02541:
Loki Patera/NIMS
Full Resolution:     TIFF (639.3 kB)     JPEG (78.9 kB)
Add Image to Favorite List 1997-11-18 Io Galileo
Solid-State Imaging
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Global view of Jupiter's volcanic moon Io, obtained on Sept. 7,1996 by NASA's Galileo spacecraft.
PIA01064:
Global View of Io (Natural and False/Enhanced Color)
Full Resolution:     TIFF (4.072 MB)     JPEG (213.7 kB)
Add Image to Favorite List 1997-11-18 Io Galileo
Solid-State Imaging
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Shown here is a comparison of NASA's Galileo color image (right, taken Sept. 7, 1996) of Jupiter's moon Io, with NASA's Voyager mosaic (left, taken in 1979) reprojected to the same geometry as the Galileo image.
PIA01063:
Voyager-to-Galileo Changes, Io's Anti-Jove Hemisphere
Full Resolution:     TIFF (2.955 MB)     JPEG (122.2 kB)
Add Image to Favorite List 1999-11-19 Io Galileo
Solid-State Imaging
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This collage of images shows the dizzying rate of geologic activity at one of the many erupting volcanoes on Jupiter's moon Io, as viewed by NASA's Galileo spacecraft during the closest-ever Io flyby on October 10, 1999.
PIA02512:
Ongoing Geologic Activity at Prometheus Volcano, Io
Full Resolution:     TIFF (1.409 MB)     JPEG (94.2 kB)
Add Image to Favorite List 1996-01-29 Io Voyager
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These photos of the four Galilean satellites of Jupiter were taken by NASA's Voyager 1 during its approach to the planet in early March 1979. Io, Europa, Ganymede, and Callisto are shown in their correct relative sizes.
PIA00012:
Galilean Satellites
Full Resolution:     TIFF (2.14 MB)     JPEG (74.25 kB)
Add Image to Favorite List 1998-06-04 Io Voyager
Imaging Science Subsystem
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Io's volcanic plains are shown in this archival image from NASA's Voyager 1, which spans an area about 1030 km (640 miles) from left to right. Numerous volcanic calderas and lava flows are visible.
PIA00324:
Volcanic Plains of Io Near Galai Patera
Full Resolution:     TIFF (2.732 MB)     JPEG (150.1 kB)
Add Image to Favorite List 1999-11-19 Io Galileo
Near Infrared Mapping Spectrometer
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This image shows Loki, the most powerful volcano in the solar system, which has been constantly active on Jupiter's moon Io. NASA's Galileo spacecraft took these images during its approach to Io on October 10, 1999.
PIA02514:
Loki as viewed by Galileo NIMS
Full Resolution:     TIFF (638.9 kB)     JPEG (92.45 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Solid-State Imaging
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The three images of Io in eclipse (top) show volcanic hot spots and airglow associated with volcanic plumes and Io's atmosphere. They were acquired by NASA's Galileo spacecraft during three separate orbits of Jupiter when the Io was in Jupiter's shadow.
PIA00739:
Eclipse Images of Io (3 views)
Full Resolution:     TIFF (1.486 MB)     JPEG (218.7 kB)
Add Image to Favorite List 1998-06-04 Io Voyager
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Io's volcanic plains are shown in this image mosaic from NASA's Voyager 1. Also visible are numerous volcanic calderas and lava flows. Ra Patera with its multihued lava flows is below and right of the mosaic's center.
PIA00321:
Io, the Ra Patera, Mazda Catena, and Gibil Patera Area
Full Resolution:     TIFF (2.485 MB)     JPEG (92.7 kB)
Add Image to Favorite List 1998-06-08 Io Voyager
VG ISS - Narrow Angle
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This is a multispectral image cube of Io from NASA's Voyager 2 images, simple cylindrical projection.
PIA00401:
Io: Cylindrical Projection
Full Resolution:     TIFF (4.465 MB)     JPEG (229.2 kB)
Add Image to Favorite List 1997-11-18 Io Galileo
Solid-State Imaging
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This false color infrared composite of Jupiter's moon Io was produced from images acquired in July and September, 1996, during the first two orbits through the Jovian system by NASA's Galileo spacecraft.
PIA00585:
Color Global Mosaic of Io
Full Resolution:     TIFF (5.461 MB)     JPEG (179.4 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Near Infrared Mapping Spectrometer
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NASA's Galileo spacecraft imaged Io at high spectral resolution during the G2 encounter on Sept. 6, 1996.
PIA00836:
Hotspots on Io During the Ganymede 2 Encounter
Full Resolution:     TIFF (460.5 kB)     JPEG (86.37 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Near Infrared Mapping Spectrometer
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This is an image of Io, taken by NASA's Galileo spacecraft during the G2 encounter in September 1996. This is a dayside image of Io (on the right) against the clouds of Jupiter (the blue background).
PIA00845:
NIMS: hotspots on Io during G2 (continued)
Full Resolution:     TIFF (632.6 kB)     JPEG (108.9 kB)
Add Image to Favorite List 1998-06-04 Io Voyager
Imaging Science Subsystem
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A huge area of Io's volcanic plains is shown in this archival image mosaic from NASA's Voyager 1. Numerous volcanic calderas and lava flows are visible here. Loki Patera, an active lava lake, is the large shield-shaped black feature.
PIA00320:
Loki Patera
Full Resolution:     TIFF (3.631 MB)     JPEG (156.6 kB)
Add Image to Favorite List 1997-09-07 Io Galileo
Solid-State Imaging
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Four views of an unnamed volcanic center (latitude 11, longitude 337) on Jupiter's moon Io showing changes seen on
June 27th, 1996 by NASA's Galileo spacecraft as compared to views seen by the Voyager spacecraft during the 1979 
flybys.
PIA00713:
Surface Changes on Io
Full Resolution:     TIFF (3.614 MB)     JPEG (133.9 kB)
Add Image to Favorite List 2001-12-10 Io Galileo
Photopolarimeter-Radiometer
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Nighttime temperatures in the southern hemisphere of Jupiter's moon Io, mapped here with data from NASA's Galileo spacecraft, give hints about the textures of surface materials, as well as the locations of volcanic hot spots.
PIA03603:
Nighttime Temperatures on Southern Io
Full Resolution:     TIFF (2.642 MB)     JPEG (344.3 kB)
Add Image to Favorite List 1999-05-08 Io Voyager
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NASA'S Voyager 2 shows that Io's volcanos continually resurface it, so that any impact craters have disappeared.
PIA01530:
Volcanic Activity on Io
Full Resolution:     TIFF (3.3 MB)     JPEG (174.6 kB)
Add Image to Favorite List 1997-09-10 Io Galileo
Solid-State Imaging
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This image, taken by NASA's Galileo spacecraft, shows a blue-colored volcanic plume consistent with the presence of sulfur dioxide gas and 'snow' condensing from the gas as the plume expands and cools.
PIA00293:
Eruption on Io
Full Resolution:     TIFF (1.322 MB)     JPEG (59.83 kB)
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