Collection:
NASA Planetary Photo Journal Collection Collection NASA Planetary Photo Journal Collection Collection
Title:
Ganymede's Trailing Hemisphere Title Ganymede's Trailing Hemisphere Title
Original Caption Released with Image:
In this global view of Ganymede's trailing side, the colors are enhanced to emphasize color differences. The enhancement reveals frosty polar caps in addition to the two predominant terrains on Ganymede, bright, grooved terrain and older, dark furrowed areas. Many craters with diameters up to several dozen kilometers are visible. The violet hues at the poles may be the result of small particles of frost which would scatter more light at shorter wavelengths (the violet end of the spectrum). Ganymede's magnetic field, which was detected by the magnetometer on NASA's Galileo spacecraft in 1996, may be partly responsible for the appearance of the polar terrain. Compared to Earth's polar caps, Ganymede's polar terrain is relatively vast. The frost on Ganymede reaches latitudes as low as 40 degrees on average and 25 degrees at some locations. For comparison with Earth, Miami, Florida lies at 26 degrees north latitude, and Berlin, Germany is located at 52 degrees north. North is to the top of the picture. The composite, which combines images taken with green, violet, and 1 micrometer filters, is centered at 306 degrees west longitude. The resolution is 9 kilometers (6 miles) per picture element. The images were taken on 29 March 1998 at a range of 918000 kilometers (570,000 miles) by the Solid State Imaging (SSI) system on NASA's Galileo spacecraft. The Jet Propulsion Laboratory, Pasadena, CA manages the Galileo mission for NASA's Office of Space Science, Washington, DC. This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at URLhttp://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at URLhttp://www.jpl.nasa.gov/galileo/sepo Original_Caption_Rel eased_with_Image In this global view of Ganymede's trailing side, the colors are enhanced to emphasize color differences. The enhancement reveals frosty polar caps in addition to the two predominant terrains on Ganymede, bright, grooved terrain and older, dark furrowed areas. Many craters with diameters up to several dozen kilometers are visible. The violet hues at the poles may be the result of small particles of frost which would scatter more light at shorter wavelengths (the violet end of the spectrum). Ganymede's magnetic field, which was detected by the magnetometer on NASA's Galileo spacecraft in 1996, may be partly responsible for the appearance of the polar terrain. Compared to Earth's polar caps, Ganymede's polar terrain is relatively vast. The frost on Ganymede reaches latitudes as low as 40 degrees on average and 25 degrees at some locations. For comparison with Earth, Miami, Florida lies at 26 degrees north latitude, and Berlin, Germany is located at 52 degrees north. North is to the top of the picture. The composite, which combines images taken with green, violet, and 1 micrometer filters, is centered at 306 degrees west longitude. The resolution is 9 kilometers (6 miles) per picture element. The images were taken on 29 March 1998 at a range of 918000 kilometers (570,000 miles) by the Solid State Imaging (SSI) system on NASA's Galileo spacecraft. The Jet Propulsion Laboratory, Pasadena, CA manages the Galileo mission for NASA's Office of Space Science, Washington, DC. This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at URLhttp://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at URLhttp://www.jpl.nasa.gov/galileo/sepo Original Caption Released with Image
Addition Date:
1999-01-18 Addition_Date 1999-01-18 Addition Date
Produced By:
DLR (German Aerospace Center) Produced_By DLR (German Aerospace Center) Produced By
Mission:
Galileo Mission Galileo Mission
Spacecraft:
Galileo Orbiter Spacecraft Galileo Orbiter Spacecraft
Target Name:
Ganymede Target_Name Ganymede Target Name
Is a satellite of:
Jupiter Is_a_satellite_of Jupiter Is a satellite of
Instrument:
Solid-State Imaging Instrument Solid-State Imaging Instrument
Product Size:
687 samples x 687 lines Product_Size 687 samples x 687 lines Product Size
Primary Data Set:
Galileo EDRs Primary_Data_Set Galileo EDRs Primary Data Set
Producer ID:
MRPS94229 Producer_ID MRPS94229 Producer ID
facet_what:
Jupiter facet_what Jupiter facet_what
facet_what:
Earth facet_what Earth facet_what
facet_what:
Galileo facet_what Galileo facet_what
facet_what:
Galileo Orbiter facet_what Galileo Orbiter facet_what
facet_what:
Solid-State Imaging facet_what Solid-State Imaging facet_what
facet_what:
Polar facet_what Polar facet_what
facet_what:
Ganymede facet_what Ganymede facet_what
facet_what:
Magnetometer facet_what Magnetometer facet_what
facet_what:
Ganymede (Jupiter Moon) facet_what Ganymede (Jupiter Moon) facet_what
facet_where:
Jet Propulsion Laboratory facet_where Jet Propulsion Laboratory facet_where
facet_where:
Jupiter facet_where Jupiter facet_where
facet_where:
Washington facet_where Washington facet_where
facet_where:
Ganymede facet_where Ganymede facet_where
facet_where:
Florida facet_where Florida facet_where
facet_where:
Berlin facet_where Berlin facet_where
facet_where:
Germany facet_where Germany facet_where
facet_where:
Jet Propulsion Laboratory (JPL) facet_where Jet Propulsion Laboratory (JPL) facet_where
facet_when:
1996 facet_when 1996 facet_when
facet_when:
29 March 1998 facet_when 29 March 1998 facet_when
facet_when_year:
1996 facet_when_year 1996 facet_when_year
facet_when_year:
1998 facet_when_year 1998 facet_when_year
Image #:
PIA01666 Image_# PIA01666 Image #
UID:
SPD-PHOTJ-PIA01666 UID SPD-PHOTJ-PIA01666 UID
orignial url:
http://photojournal… orignial_url http://photojournal… orignial url

Ganymede's Trailing Hemisphere

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Ganymede's Trailing Hemisphere