Collection:
NASA Planetary Photo Journal Collection Collection NASA Planetary Photo Journal Collection Collection
Title:
Large Impact Structures on Europa Title Large Impact Structures on Europa Title
Original Caption Released with Image:
The picture compares four large impact structures on Jupiter's icy moon, Europa. Clockwise, from top left, are Pwyll, Cilix, Tyre, and Mannann'an. Impact structures with diameters of more than 20 kilometers are rather rare on Europa. Tyre is most unusual. While the effective crater, which is somewhat larger than the prominent large bull's eye feature, is about 40 kilometers (25 miles) across, the entire structure is much larger. The concentric rings display relatively little relief. Some of the smaller craters near Tyre were formed by material ejected by and then redeposited from the impact which formed Tyre. One hypothesis for such characteristics is that the impactor which formed Tyre penetrated through an icy crust into a less brittle layer. While Pwyll, Cilix, and Mannann'an also display shallow crater depths for their size, they more closely resemble similar sized craters on two neighboring moons of Jupiter, Ganymede and Callisto. Perhaps the impactor did not punch through the upper crust during these events. This might have been the case if the impacting body was smaller or weaker than in the case of Tyre or if the crust was thinner at the location of Tyre during the impact event. North is to the top of the picture. The sun illuminates the surfaces from the right, except for Tyre, where the sun illuminates the surface from the left. The horizontal and vertical grey lines in the Tyre mosaic indicate gaps in the data received for this image. The Pwyll image was taken on December 16, 1997, Cilix on May 31, 1998,Tyre on March 29, 1998, and Mannann'an on March 29, 1998. All images were taken 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 The picture compares four large impact structures on Jupiter's icy moon, Europa. Clockwise, from top left, are Pwyll, Cilix, Tyre, and Mannann'an. Impact structures with diameters of more than 20 kilometers are rather rare on Europa. Tyre is most unusual. While the effective crater, which is somewhat larger than the prominent large bull's eye feature, is about 40 kilometers (25 miles) across, the entire structure is much larger. The concentric rings display relatively little relief. Some of the smaller craters near Tyre were formed by material ejected by and then redeposited from the impact which formed Tyre. One hypothesis for such characteristics is that the impactor which formed Tyre penetrated through an icy crust into a less brittle layer. While Pwyll, Cilix, and Mannann'an also display shallow crater depths for their size, they more closely resemble similar sized craters on two neighboring moons of Jupiter, Ganymede and Callisto. Perhaps the impactor did not punch through the upper crust during these events. This might have been the case if the impacting body was smaller or weaker than in the case of Tyre or if the crust was thinner at the location of Tyre during the impact event. North is to the top of the picture. The sun illuminates the surfaces from the right, except for Tyre, where the sun illuminates the surface from the left. The horizontal and vertical grey lines in the Tyre mosaic indicate gaps in the data received for this image. The Pwyll image was taken on December 16, 1997, Cilix on May 31, 1998,Tyre on March 29, 1998, and Mannann'an on March 29, 1998. All images were taken 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:
Europa Target_Name Europa 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:
988 samples x 900 lines Product_Size 988 samples x 900 lines Product Size
Primary Data Set:
Galileo EDRs Primary_Data_Set Galileo EDRs Primary Data Set
Producer ID:
MRPS94208 Producer_ID MRPS94208 Producer ID
facet_what:
Sun facet_what Sun facet_what
facet_what:
Crater facet_what Crater facet_what
facet_what:
Moon facet_what Moon facet_what
facet_what:
Jupiter facet_what Jupiter 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:
Europa facet_what Europa facet_what
facet_what:
Callisto facet_what Callisto facet_what
facet_what:
Ganymede facet_what Ganymede facet_what
facet_what:
Impactor facet_what Impactor facet_what
facet_where:
Jet Propulsion Laboratory facet_where Jet Propulsion Laboratory facet_where
facet_where:
Jupiter facet_where Jupiter facet_where
facet_where:
Europa facet_where Europa facet_where
facet_where:
Callisto facet_where Callisto facet_where
facet_where:
Washington facet_where Washington facet_where
facet_where:
Ganymede facet_where Ganymede facet_where
facet_where:
Jet Propulsion Laboratory (JPL) facet_where Jet Propulsion Laboratory (JPL) facet_where
facet_when:
December 16, 1997 facet_when December 16, 1997 facet_when
facet_when:
March 29, 1998 facet_when March 29, 1998 facet_when
facet_when:
May 31, 1998 facet_when May 31, 1998 facet_when
facet_when_year:
1997 facet_when_year 1997 facet_when_year
facet_when_year:
1998 facet_when_year 1998 facet_when_year
Image #:
PIA01661 Image_# PIA01661 Image #
UID:
SPD-PHOTJ-PIA01661 UID SPD-PHOTJ-PIA01661 UID
orignial url:
http://photojournal… orignial_url http://photojournal… orignial url

Large Impact Structures on Europa

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Large Impact Structures on Europa