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Collection:
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NASA Great Images in Nasa Collection
Collection
NASA Great Images in Nasa Collection
Collection
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Title:
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Global Image of Io
Title
Global Image of Io
Title
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Full Description:
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NASA's Galileo spacecraft acquired its highest resolution images of Jupiter's moon Io on July 3, 1999 during its closest pass to Io since orbit insertion in late 1995. This color mosaic uses the near-infrared, green and violet filters (slightly more than the visible range) of the spacecraft's camera and approximates what the human eye would see. Most of Io's surface has pastel colors, punctuated by black, brown, green, orange, and red units near the active volcanic centers. A false color version of the mosaic has been created to enhance the contrast of the color variations. The improved resolution reveals small-scale color units which had not been recognized previously and which suggest that the lavas and sulfurous deposits are composed of complex mixtures. Some of the bright (whitish), high-latitude (near the top and bottom) deposits have an ethereal quality like a transparent covering of frost. Bright red areas were seen previously only as diffuse deposits. However, they are now seen to exist as both diffuse deposits and sharp linear features like fissures. Some volcanic centers have bright and colorful flows, perhaps due to flows of sulfur rather than silicate lava. In this region bright, white material can also be seen to emanate from linear rifts and cliffs. Comparison of this image to previous Galileo images reveals many changes due to the ongoing volcanic activity. North is towards the top of the picture and the sun illuminates the surface from almost directly behind the spacecraft. This illumination geometry is good for imaging color variations, but poor for imaging topographic shading. However, some topographic shading can be seen here due to the combination of relatively high resolution (1.3 kilometers or 0.8 miles per picture element) and the rugged topography over parts of Io. The image is centered at 0.3 degrees north latitude and 137.5 degrees west longitude. The resolution is 1.3 kilometers (0.8 miles) per picture element. The images were taken on July 3, 1999 at a range of about 130,000 kilometers (81,000 miles) by the Solid State Imaging (SSI) system on NASA's Galileo spacecraft during its twenty-first orbit. The Jet Propulsion Laboratory, Pasadena, California manages the Galileo mission for NASA's Office of Space Science, Washington, DC.
Full_Description
NASA's Galileo spacecraft acquired its highest resolution images of Jupiter's moon Io on July 3, 1999 during its closest pass to Io since orbit insertion in late 1995. This color mosaic uses the near-infrared, green and violet filters (slightly more than the visible range) of the spacecraft's camera and approximates what the human eye would see. Most of Io's surface has pastel colors, punctuated by black, brown, green, orange, and red units near the active volcanic centers. A false color version of the mosaic has been created to enhance the contrast of the color variations. The improved resolution reveals small-scale color units which had not been recognized previously and which suggest that the lavas and sulfurous deposits are composed of complex mixtures. Some of the bright (whitish), high-latitude (near the top and bottom) deposits have an ethereal quality like a transparent covering of frost. Bright red areas were seen previously only as diffuse deposits. However, they are now seen to exist as both diffuse deposits and sharp linear features like fissures. Some volcanic centers have bright and colorful flows, perhaps due to flows of sulfur rather than silicate lava. In this region bright, white material can also be seen to emanate from linear rifts and cliffs. Comparison of this image to previous Galileo images reveals many changes due to the ongoing volcanic activity. North is towards the top of the picture and the sun illuminates the surface from almost directly behind the spacecraft. This illumination geometry is good for imaging color variations, but poor for imaging topographic shading. However, some topographic shading can be seen here due to the combination of relatively high resolution (1.3 kilometers or 0.8 miles per picture element) and the rugged topography over parts of Io. The image is centered at 0.3 degrees north latitude and 137.5 degrees west longitude. The resolution is 1.3 kilometers (0.8 miles) per picture element. The images were taken on July 3, 1999 at a range of about 130,000 kilometers (81,000 miles) by the Solid State Imaging (SSI) system on NASA's Galileo spacecraft during its twenty-first orbit. The Jet Propulsion Laboratory, Pasadena, California manages the Galileo mission for NASA's Office of Space Science, Washington, DC.
Full Description
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Date:
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08/27/1999
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NASA Center:
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Jet Propulsion Laboratory
NASA_Center
Jet Propulsion Laboratory
NASA Center
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Subject Category:
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Voyager-Galileo
Subject_Category
Voyager-Galileo
Subject Category
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Subject Category:
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Jupiters Moons
Subject_Category
Jupiters Moons
Subject Category
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Keywords:
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Laboratory
Keywords
Laboratory
Keywords
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Keywords:
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Jet
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Keywords:
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Propulsion
Keywords
Propulsion
Keywords
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Keywords:
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JPL
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Keywords:
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Galileo
Keywords
Galileo
Keywords
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Keywords:
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Io
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Audience:
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General Public
Audience
General Public
Audience
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facet_what:
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Sun
facet_what
Sun
facet_what
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facet_what:
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Moon
facet_what
Moon
facet_what
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facet_what:
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Io
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facet_what:
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Galileo
facet_what
Galileo
facet_what
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facet_what:
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Jupiter
facet_what
Jupiter
facet_what
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facet_what:
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Voyager
facet_what
Voyager
facet_what
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facet_where:
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Washington
facet_where
Washington
facet_where
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facet_where:
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California
facet_where
California
facet_where
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facet_where:
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Jet Propulsion Laboratory
facet_where
Jet Propulsion Laboratory
facet_where
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facet_where:
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Jupiter
facet_where
Jupiter
facet_where
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facet_where:
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Jet Propulsion Laboratory (JPL)
facet_where
Jet Propulsion Laboratory (JPL)
facet_where
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facet_when:
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July 3, 1999
facet_when
July 3, 1999
facet_when
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facet_when:
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08-27-1999
facet_when
08-27-1999
facet_when
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facet_when_year:
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1999
facet_when_year
1999
facet_when_year
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Image #:
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PIA02308
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original_url:
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original_url
original_url
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UID:
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SPD-GRIN-GPN-2000-00 0419
UID
SPD-GRIN-GPN-2000-00 0419
UID
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Center:
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JPL
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Center Number:
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PIA02308
Center_Number
PIA02308
Center Number
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GRIN DataBase Number:
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GPN-2000-000419
GRIN_DataBase_Number
GPN-2000-000419
GRIN DataBase Number
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Creator-Photographer:
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NASA
Creator-Photographer
NASA
Creator-Photographer
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Original Source:
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DIGITAL
Original_Source
DIGITAL
Original Source
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