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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 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 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 1996-11-16 Io Voyager
VG ISS - Narrow Angle
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The detailed structure near the volcano Loki is like nothing seen elsewhere on Io. When NASA's Voyager 1 took this picture, the main eruptive activity came from the lower left of the dark linear feature (perhaps a rift) in the center.
PIA00375:
Io - Volcano Loki and Loki Patera
Full Resolution:     TIFF (517.3 kB)     JPEG (51.9 kB)
Add Image to Favorite List 1996-11-16 Io Voyager
VG ISS - Narrow Angle
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This photo of a volcanic eruption on Jupiter's satellite Io (dark fountain-like feature near the limb) was taken March 4, 1979, about 12 hours before NASA's Voyager 1's closest approach to Jupiter.
PIA00373:
Io - Volcanic Eruption
Full Resolution:     TIFF (66.68 kB)     JPEG (11.83 kB)
Add Image to Favorite List 1996-11-16 Io Voyager
VG ISS - Narrow Angle
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This photo of an active volcanic eruption on Jupiter's satellite Io was taken 1 hour, 52 minutes after the accompanying picture, late in the evening of March 4, 1979, by NASA's Voyager 1.
PIA00374:
Io - One of at Least Four Simultaneous Erupting Volcanic Eruptions
Full Resolution:     TIFF (25.26 kB)     JPEG (4.047 kB)
Add Image to Favorite List 1997-01-09 Io Voyager
VG ISS - Narrow Angle
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This photo of Jupiter's satellite Io was taken by NASA's Voyager 1 about 4:30 p.m. (PST) March 2, 1979. The spacecraft was about 5 million miles (8.3 million kilometers away).
PIA00378:
Io At 5 Million Miles
Full Resolution:     TIFF (304.1 kB)     JPEG (34.45 kB)
Add Image to Favorite List 1997-01-09 Io Voyager
VG ISS - Narrow Angle
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This dramatic view of Jupiter's satellite Io shows two simultaneously occurring volcanic eruptions, as seenby NASA's Voyager 1 on March 8, 1979, looking back 2.6 million miles (4.5 

million kilometers) at Io, three days after its historic encounter.
PIA00379:
Volcanic Eruptions on Io
Full Resolution:     TIFF (7.186 kB)     JPEG (2.809 kB)
Add Image to Favorite List 1997-09-07 Io Galileo
Solid-State Imaging
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Three views of the full disk of Jupiter's volcanic moon, Io, each shown in natural and enhanced color. These three views, taken NASA's Galileo in late June 1996, show about 75 percent of Io's surface.
PIA00715:
Full Disk Views of Io (Natural and Enhanced Color)
Full Resolution:     TIFF (7.555 MB)     JPEG (204.3 kB)
Add Image to Favorite List 1997-09-07 Io Galileo
Solid-State Imaging
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Four views of the hemisphere of Io which faces Jupiter 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.
PIA00712:
Resurfacing of the Jupiter-facing hemisphere of Io
Full Resolution:     TIFF (4.461 MB)     JPEG (189.4 kB)
Add Image to Favorite List 1997-09-07 Io Galileo
Solid-State Imaging
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Four views of the volcano Ra Patera 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.
PIA00709:
Massive Resurfacing of the Ionian Volcano Ra Patera
Full Resolution:     TIFF (5.755 MB)     JPEG (211.6 kB)
Add Image to Favorite List 1997-09-07 Io Galileo
Solid-State Imaging
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Four views of the volcano Loki Patera 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.
PIA00710:
Changes near the Volcano Loki Patera on Io
Full Resolution:     TIFF (5.808 MB)     JPEG (185.5 kB)
Add Image to Favorite List 1997-09-07 Io Galileo
Solid-State Imaging
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Four views of Euboea Fluctus 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.
PIA00711:
Unusual Volcanic Pyroclastic Deposits on Io
Full Resolution:     TIFF (4.224 MB)     JPEG (179.7 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 1997-09-07 Io Galileo
Solid-State Imaging
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Two views of three areas 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.
PIA00714:
Three Surface Changes on Io
Full Resolution:     TIFF (144.5 kB)     JPEG (8.796 kB)
Add Image to Favorite List 1997-09-07 Io Galileo
Solid-State Imaging
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Five color views of Jupiter's moon Io, as seen by NASA's Galileo spacecraft camera, were taken between the 25th and the 29th of June, 1996
PIA00491:
Five Color Views of Io
Full Resolution:     TIFF (4.97 MB)     JPEG (155.9 kB)
Add Image to Favorite List 1997-09-07 Io Galileo
Solid-State Imaging
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Volcanic hot spots and auroral emissions glow on the darkside of Jupiter's moon Io in the image at left. The image was taken by the camera onboard NASA's Galileo spacecraft on 29 June, 1996 UT while Io was in Jupiter's shadow.
PIA00274:
Io Glowing in the Dark
Full Resolution:     TIFF (1.414 MB)     JPEG (208.6 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 1997-09-07 Io Galileo
Solid-State Imaging
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These frames detail the changes around Pele on Jupiter's moon Io, as seen by NASA's Voyager 1 (left), Voyager 2 (middle), and Galileo (right). The Voyager frames were taken in 1979, the Galileo view was obtained in June, 1996.
PIA00717:
Pele Comparisons Since 1979
Full Resolution:     TIFF (624.4 kB)     JPEG (21.91 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 1997-09-08 Io Galileo
Solid-State Imaging
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Three full-disk color views of Jupiter's volcanic moon Io as seen by NASA's Galileo spacecraft are shown in enhanced color to highlight details of the surface.
PIA00292:
Three Views of Io
Full Resolution:     TIFF (3.931 MB)     JPEG (118.1 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)
Add Image to Favorite List 1997-11-04 Io Galileo
Solid-State Imaging
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This archival frame from an animation obtained Sept. 1996, is part of a sequence of full disk Io images taken prior to NASA's Galileo orbiter's second encounter with Ganymede.
PIA01073:
Io Plume Monitoring (frames 1-36) Animation Icon
Full Resolution:
Add Image to Favorite List 1997-11-17 Io Galileo
Solid-State Imaging
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This color image, acquired during NASA's Galileo ninth orbit (C9) 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 named Pillan Patera.
PIA01081:
Color Mosaic and Active Volcanic Plumes on Io
Full Resolution:     TIFF (4.933 MB)     JPEG (226.2 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 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 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 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 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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Detail of changes around two hotspots on Jupiter's moon Io as seen by NASA's Voyager 1 in April 1979 (left) and NASA's Galileo spacecraft on September 7th, 1996 (middle and right).
PIA01065:
Lack of Visible Change Around Active Hotspots on Io
Full Resolution:     TIFF (80.26 kB)     JPEG (5.685 kB)
Add Image to Favorite List 1997-11-18 Io Galileo
Solid-State Imaging
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Detail of changes around Marduk on Jupiter's moon Io as seen by NASA's Voyager 1 in 1979 (upper left) and NASA's Galileo spacecraft between June 1996 (lower left) and September 1996 (upper and lower right).
PIA01066:
Changes around Marduk Between Voyager, and Galileo's First Two Orbits
Full Resolution:     TIFF (342.4 kB)     JPEG (18.46 kB)
Add Image to Favorite List 1997-11-18 Io Galileo
Solid-State Imaging
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Detail of changes on Jupiter's moon Io in the region around Maui and Amirani as seen by NASA's Voyager 1 spacecraft in April 1979 (left frame) and NASA's Galileo spacecraft in September 1996 (right frame).
PIA01067:
Changes on Io around Maui and Amirani between Voyager 1 and Galileo's Second Orbit
Full Resolution:     TIFF (107.1 kB)     JPEG (6.949 kB)
Add Image to Favorite List 1997-11-18 Io Galileo
Solid-State Imaging
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Detail of changes east of Pele on Jupiter's moon Io as seen by NASA's Galileo spacecraft between June (left) and September (right) 1996.
PIA01068:
Changes east of Pele between Galileo's First Two Orbits
Full Resolution:     TIFF (64.12 kB)     JPEG (4.428 kB)
Add Image to Favorite List 1997-11-18 Io Galileo
Solid-State Imaging
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Six views of the volcanic plume named Prometheus, as seen against Io's disk and near the bright limb (edge) of the satellite by NASA's Galileo spacecraft during its second (G2) orbit of Jupiter.
PIA01069:
Active Volcanic Eruptions on Io
Full Resolution:     TIFF (164.3 kB)     JPEG (20.91 kB)
Add Image to Favorite List 1997-11-18 Io Galileo
Solid-State Imaging
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Detail of changes around a probable vent about 650 kilometers north of Prometheus on Jupiter's moon Io as seen in images obtained by the NASA's Voyager 1 spacecraft in April 1979 (left) and NASA's Galileo spacecraft on Sept. 7th, 1996 (right).
PIA01070:
Changes on Io between Voyager 1 and Galileo's Second Orbit Around an Unnamed Vent North of Prometheus
Full Resolution:     TIFF (38.1 kB)     JPEG (3.157 kB)
Add Image to Favorite List 1997-11-18 Io Galileo
Solid-State Imaging
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Detail of changes on Jupiter's moon Io in the region around Volund as seen by NASA's Voyager 1 spacecraft in April 1979 (left frame) and NASA's Galileo spacecraft in September 1996 (right frame).
PIA01071:
Changes on Io around Volund between Voyager 1 and Galileo's Second Orbit
Full Resolution:     TIFF (75.86 kB)     JPEG (4.377 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 1997-12-18 Io Galileo
Solid-State Imaging
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Shown here is a highest-resolution image of Io (Latitude: -60 to +20 degrees, Longitude: 150 to 230 degrees) acquired by NASA's Galileo spacecraft, revealing a great variety of landforms.
PIA00536:
Geologic Landforms on Io
Full Resolution:     TIFF (685.5 kB)     JPEG (126.1 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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Shown here is a portion of a high-resolution image of Io (Latitude: +10 to +60 degrees, Longitude: 180 to 225 degrees) acquired by NASA's Galileo spacecraft, revealing immense lava flows and other volcanic landforms.
PIA00537:
Volcanically Active Regions on Io
Full Resolution:     TIFF (259 kB)     JPEG (45.96 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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Geologic Landforms on Io (Area 1)
PIA01103:
Geologic Landforms on Io (Area 1)
Full Resolution:     TIFF (506.9 kB)     JPEG (75.32 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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Shown here is one of the topographic mapping images of Jupiter's moon Io (Latitude: +5 to +48 degrees, Longitude: 120 to 185 degrees) acquired by NASA's Galileo spacecraft, revealing a great variety of landforms.
PIA01104:
Geologic Landforms on Io (Area 2)
Full Resolution:     TIFF (391.5 kB)     JPEG (52.41 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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Shown here is one of the topographic mapping images of Jupiter's moon Io (Latitude: +2 to +65 degrees, Longitude: 150 to 223 degrees) acquired by NASA's Galileo spacecraft, revealing a great variety of landforms.
PIA01105:
Geologic Landforms on Io (Area 3)
Full Resolution:     TIFF (517.6 kB)     JPEG (76.22 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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Shown here is one of the topographic mapping images of Jupiter's moon Io (Latitude: -60 to 20 degrees, Longitude: 180 to 270 degrees) acquired by NASA's Galileo spacecraft, revealing a great variety of landforms.
PIA01106:
Geologic Landforms on Io (Area 4)
Full Resolution:     TIFF (660.8 kB)     JPEG (105.9 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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Shown here is one of the topographic mapping images of Jupiter's moon Io (Latitude: -40 to +90 degrees, Longitude: 210-320 degrees) acquired by NASA's Galileo spacecraft, revealing a great variety of landforms.
PIA01107:
Geologic Landforms on Io (Area 5)
Full Resolution:     TIFF (519.6 kB)     JPEG (78.22 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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Mosaic of images of Io acquired through the clear filter of the Solid State Imaging (CCD) system aboard NASA's Galileo spacecraft during orbit C3, show more than half of Io's surface.
PIA01108:
Mosaic of Io
Full Resolution:     TIFF (6.368 MB)     JPEG (1.045 MB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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Io, the most volcanic body in the solar system is seen in the highest resolution obtained to date [Sept.7 & Nov. 6, 1996] by NASA's Galileo spacecraft.
PIA00583:
High Resolution Global View of Io
Full Resolution:     TIFF (9.084 MB)     JPEG (400.9 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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This image of Jupiter's moon Io and its surrounding sky is shown in false color. This image was taken on Nov. 9, 1996 through the green-yellow filter of the solid state imaging (CCD) system aboard NASA's Galileo spacecraft.
PIA00593:
Io's Sodium Cloud (Green-yellow Filter)
Full Resolution:     TIFF (77.65 kB)     JPEG (15.64 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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This image from NASA's Galileo spacecraft is of Prometheus' sunlit plume and Io's illuminated crescent.
PIA01110:
Io's Sodium Cloud (Clear and Green-Yellow Filters)
Full Resolution:     TIFF (94.75 kB)     JPEG (22.06 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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This picture contains two images of Jupiter's moon Io and its surrounding sky. This image was taken by NASA's Galileo spacecraft in 1996.
PIA00594:
Io's Sodium Cloud (Clear Filter and Green-Yellow Filter with Intensity Contours)
Full Resolution:     TIFF (36.95 kB)     JPEG (68.03 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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This image from NASA's Galileo spacecraft is of Jupiter's moon Io and its surrounding sky is shown in false color.
PIA01111:
Io's Sodium Cloud On-Chip Format (Clear and Green-Yellow Filters Superimposed)
Full Resolution:     TIFF (187.9 kB)     JPEG (11.39 kB)
Add Image to Favorite List 1997-12-18 Io Galileo
Solid-State Imaging
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This image of Jupiter's moon Io and its surrounding sky is shown in false color. It was taken at 5 hours 30 minutes Universal Time on Nov. 9, 1996 by the solid state imaging (CCD) system aboard NASA's Galileo spacecraft,
PIA01109:
Io's Sodium Cloud (Clear Filter)
Full Resolution:     TIFF (119.1 kB)     JPEG (11.01 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 1997-12-18 Io Galileo
Solid-State Imaging
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Cutaway view of the possible internal structure of Io. The surface of the satellite is a mosaic of images obtained in 1979 by NASA's Voyager spacecraft.
PIA01129:
Interior of Io
Full Resolution:     TIFF (8.285 MB)     JPEG (579.6 kB)
Add Image to Favorite List 1998-02-04 Io Galileo
Solid-State Imaging
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Each time NASA's Galileo spacecraft orbits the planet Jupiter, it encounters one of the four Galilean satellites. From left to right in this mosaic, the moons shown are Io, Europa, Ganymede, and Callisto.
PIA00743:
Landscape Comparisons - Galilean Satellites
Full Resolution:     TIFF (6.437 MB)     JPEG (605.1 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
Solid-State Imaging
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This image of Io was acquired by NASA's Galileo spacecraft during its ninth orbit (C9) of Jupiter as part of a sequence of images designed to cover Io at low illumination angles to map the landforms.
PIA01217:
Topography of Io
Full Resolution:     TIFF (150 kB)     JPEG (30.38 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Solid-State Imaging
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 These two views of Io were acquired by NASA's Galileo spacecraft during its seventh orbit (G7) of Jupiter. The images were designed to view large features on Io at low sun angles when the lighting conditions emphasize the topography.
PIA01218:
Mountains and Plateaus on Io
Full Resolution:     TIFF (592.9 kB)     JPEG (106.4 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Solid-State Imaging
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Thiscolor composite of Io was acquired by Galileo during its ninth orbit (C9) of Jupiter and are part of a sequence of images designed to map the topography or relief on Io and to monitor changes in the surface color due to volcanic activity.
PIA00740:
Topography of Io (color)
Full Resolution:     TIFF (550 kB)     JPEG (26.36 kB)
Add Image to Favorite List 1998-03-26 Io Galileo
Solid-State Imaging
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This color composite of Io, acquired by NASA's Galileo spacecraft during its ninth orbit (C9) of Jupiter, shows the hemisphere of Io which is centered at longitude 52 degrees. The dark feature to the lower right of the center of the disk is Kanehekili.
PIA01220:
Io's Kanehekili Hemisphere
Full Resolution:     TIFF (327 kB)     JPEG (14.68 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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Hotspots are seen in the vicinity of Prometheus, Volund and Marduk, all sites of volcanic plume activity during NASA's Galileo encounter in 1996.
PIA00520:
NIMS: hotspots on Io during G2
Full Resolution:     TIFF (541 kB)     JPEG (103.4 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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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 1998-03-26 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 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
Near Infrared Mapping Spectrometer
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NASA's Galileo spacecraft observed Io on nearly every orbit as part of a program monitoring the level of volcanic activity on this moon. Io is the most volcanically active body in the Solar System.
PIA00899:
New Hot Spot on Io Discovered by NIMS During Orbit C9
Full Resolution:     TIFF (783.9 kB)     JPEG (130.5 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)
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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
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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
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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
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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)
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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
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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
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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
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Add Image to Favorite List 1998-06-04 Io Voyager
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NASA's Voyager 1 computer color mosaics, shown in approximately natural color and in Lambertian equal-area projections, show the Eastern (left) and Western (right) hemispheres of Io.
PIA00318:
Io Shown in Lambertian Equal Area Projection and in Approximately Natural Color
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Add Image to Favorite List 1998-06-04 Io Voyager
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Io's volcanic plains are shown in NASA's Voyager 1 image mosaic which covers the area roughly from latitude 60 deg N. to latitude 60 deg S. and longitude 100-345. Numerous volcanic calderas, lava flows, and volcanic eruption plumes are visible here.
PIA00319:
Global Mercator Mosaic
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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
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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
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Add Image to Favorite List 1998-06-04 Io Voyager
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The eruption of Pele on Jupiter's moon Io. The volcanic plume rises 300 kilometers above the surface in an umbrella-like shape. This image is from NASA's Voyager 1.
PIA00323:
Eruption of Pele
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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
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Add Image to Favorite List 1998-06-04 Io Voyager
Imaging Science Subsystem
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This archival image mosaic from NASA's Voyager 1 shows Io's south polar region. The South Pole is near the terminator (line between daylight and night) at right center. Haemus Mons, a 10-km high (32,000 foot) mountain is at bottom.
PIA00327:
Io, the South Polar Region
Full Resolution:     TIFF (8.014 MB)     JPEG (297.8 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 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 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
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Add Image to Favorite List 1998-07-02 Io Galileo
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During its 14th orbit of Jupiter in March 29, 1998, NASA's Galileo spacecraft captured an image of Jupiter's moon, Io, that has the same lighting geometry that will exist during Io's close Io flyby on October 11, 1999 (the 24th orbit).
PIA01605:
Io imaging during Galileo's 24th orbit
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Add Image to Favorite List 1998-09-15 Io Galileo
Solid-State Imaging
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Composite view of Amalthea and Io at the same scale. The visible part of Amalthea is about 150 kilometers across. The Amalthea and Io composites were obtained by the solid state imaging (SSI) camera on NASA's Galileo spacecraft on different orbits.
PIA01626:
Comparison of Amalthea to Io
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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
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Add Image to Favorite List 1998-10-13 Io Galileo
Solid-State Imaging
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This view of Jupiter's moon Io in eclipse was acquired by NASA's Galileo spacecraft while the moon was in Jupiter's shadow. Gases above the satellite's surface produced a ghostly glow that could be seen at visible wavelengths (red, green, and violet).
PIA01637:
Io's Aurorae
Full Resolution:     TIFF (638 kB)     JPEG (46.23 kB)
Add Image to Favorite List 1998-11-02 Io Voyager
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The South Polar region of Jupiter's moon Io, seen by NASA's Voyager 1 as it passed beneath in the early 1980s.
PIA01485:
South Polar Region of Io
Full Resolution:     TIFF (8.229 MB)     JPEG (257.5 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
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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 1999-01-18 Io Galileo
Solid-State Imaging
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This global mosaic shows the highest resolution Galileo images available of Jupiter's moon, Io. Images were obtained by the Solid State Imaging (SSI) system on NASA's Galileo spacecraft.
PIA01663:
Highest Resolution Mosaic of Io
Full Resolution:     TIFF (247.9 kB)     JPEG (126.2 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 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
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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 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 1999-05-21 Io Hubble Space Telescope
WFPC2
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Hubble Clicks Images of Io Sweeping Across Jupiter
PIA01540:
Hubble Clicks Images of Io Sweeping Across Jupiter
Full Resolution:     TIFF (6.217 MB)     JPEG (285.7 kB)
Add Image to Favorite List 1999-06-16 Io Voyager
VG ISS - Narrow Angle
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VOLCANIC EXPLOSION ON IO: NASA's Voyager 1 acquired this image of Io on March 4 at 5:30 p.m. (PST) about 11 hours before closest approach to the Jupiter moon.
PIA01971:
Volcanic Explosion on Io
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Add Image to Favorite List 1999-07-16 Io Voyager
VG ISS - Narrow Angle
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The trailing face of Jupiter's inner satellite Io is shown in this photo taken by NASA's Voyager 1 on March 3, 1979, from a distance of 1.7 million miles.
PIA01986:
Io - Jupiter's inner satellite
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Add Image to Favorite List 1999-07-23 Io Voyager
VG ISS - Narrow Angle
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This NASA Voyager 2 picture of Io was taken in ultraviolet light on the evening of July 4, 1979, at a range of 4.7 million kilometers (2.9 million miles).
PIA01989:
Io
Full Resolution:     TIFF (17.54 kB)     JPEG (9.241 kB)
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