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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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Evidence for Recent Liquid Water on Mars
Title
Evidence for Recent Liquid Water on Mars
Title
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Full Description:
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Gullies eroded into the wall of a meteor impact crater in Noachis Terra. This high resolution view (top left) from the Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) shows channels and associated aprons of debris that are interpreted to have formed by groundwater seepage, surface runoff, and debris flow. The lack of small craters superimposed on the channels and apron deposits indicates that these features are geologically young. It is possible that these gullies indicate that liquid water is present within the martian subsurface today. The MOC image was acquired on September 28, 1999. The scene covers an area approximately 3 kilometers (1.9 miles) wide by 6.7 km (4.1 mi) high (note, the aspect ratio is 1.5 to 1.0). Sunlight illuminates this area from the upper left. The image is located near 54.8S, 342.5W. The context image (above) shows the location of the MOC image on the south-facing wall of an impact crater approximately 20 kilometers (12 miles) in diameter. The context picture was obtained by the Viking 1 orbiter in 1980 and is illuminated from the upper left. The large mound on the floor of the crater in the context view is a sand dune field. The Mars Orbiter Camera high resolution images are taken black-and-white (grayscale); the color seen here has been synthesized from the colors of Mars observed by the MOC wide angle cameras and by the Viking Orbiters in the late 1970s. A brief description of how the color was generated: The MOC narrow angle camera only takes grayscale (black and white) pictures. To create the color versions seen here, we have taken much lower resolution red and blue images acquired by the MOC's wide angle cameras, and by the Viking Orbiter cameras in the 1970s, synthesized a green image by averaging red and blue, and created a pallete of colors that represent the range of colors on Mars. We then use a relationship that correlates color and brightness to assign a color to each gray level. This is only a crude approximation of martian color. It is likely Mars would not look like this to a human observer at Mars.
Full_Description
Gullies eroded into the wall of a meteor impact crater in Noachis Terra. This high resolution view (top left) from the Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) shows channels and associated aprons of debris that are interpreted to have formed by groundwater seepage, surface runoff, and debris flow. The lack of small craters superimposed on the channels and apron deposits indicates that these features are geologically young. It is possible that these gullies indicate that liquid water is present within the martian subsurface today. The MOC image was acquired on September 28, 1999. The scene covers an area approximately 3 kilometers (1.9 miles) wide by 6.7 km (4.1 mi) high (note, the aspect ratio is 1.5 to 1.0). Sunlight illuminates this area from the upper left. The image is located near 54.8S, 342.5W. The context image (above) shows the location of the MOC image on the south-facing wall of an impact crater approximately 20 kilometers (12 miles) in diameter. The context picture was obtained by the Viking 1 orbiter in 1980 and is illuminated from the upper left. The large mound on the floor of the crater in the context view is a sand dune field. The Mars Orbiter Camera high resolution images are taken black-and-white (grayscale); the color seen here has been synthesized from the colors of Mars observed by the MOC wide angle cameras and by the Viking Orbiters in the late 1970s. A brief description of how the color was generated: The MOC narrow angle camera only takes grayscale (black and white) pictures. To create the color versions seen here, we have taken much lower resolution red and blue images acquired by the MOC's wide angle cameras, and by the Viking Orbiter cameras in the 1970s, synthesized a green image by averaging red and blue, and created a pallete of colors that represent the range of colors on Mars. We then use a relationship that correlates color and brightness to assign a color to each gray level. This is only a crude approximation of martian color. It is likely Mars would not look like this to a human observer at Mars.
Full Description
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Date:
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06/22/2000
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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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Planet-Mars
Subject_Category
Planet-Mars
Subject Category
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Subject Category:
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Mars Global Surveyor
Subject_Category
Mars Global Surveyor
Subject Category
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Keywords:
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Camera
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Keywords:
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Surveyor
Keywords
Surveyor
Keywords
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Keywords:
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Orbiter
Keywords
Orbiter
Keywords
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Keywords:
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Viking
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Keywords:
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Mars
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Keywords:
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Global
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Keywords:
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Water
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Keywords:
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MGS
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Keywords:
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MOC
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Keywords:
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Gullies
Keywords
Gullies
Keywords
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Keywords:
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Noachis
Keywords
Noachis
Keywords
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Keywords:
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Terra
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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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Crater
facet_what
Crater
facet_what
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facet_what:
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Surveyor
facet_what
Surveyor
facet_what
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facet_what:
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Mars
facet_what
Mars
facet_what
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facet_what:
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Viking
facet_what
Viking
facet_what
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facet_what:
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Viking 1 Orbiter
facet_what
Viking 1 Orbiter
facet_what
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facet_what:
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Terra
facet_what
Terra
facet_what
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facet_what:
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Mars Global Surveyor Orbiter (MGS)
facet_what
Mars Global Surveyor Orbiter (MGS)
facet_what
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facet_what:
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Mars Orbiter Camera (MOC)
facet_what
Mars Orbiter Camera (MOC)
facet_what
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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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Mars
facet_where
Mars
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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1980
facet_when
1980
facet_when
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facet_when:
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September 28, 1999
facet_when
September 28, 1999
facet_when
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facet_when:
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06-22-2000
facet_when
06-22-2000
facet_when
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facet_when_year:
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1980
facet_when_year
1980
facet_when_year
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facet_when_year:
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1999
facet_when_year
1999
facet_when_year
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facet_when_year:
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2000
facet_when_year
2000
facet_when_year
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Image #:
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PIA01035
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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 1434
UID
SPD-GRIN-GPN-2000-00 1434
UID
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Center:
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JPL
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Center Number:
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PIA01035
Center_Number
PIA01035
Center Number
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GRIN DataBase Number:
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GPN-2000-001434
GRIN_DataBase_Number
GPN-2000-001434
GRIN DataBase Number
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Creator-Photographer:
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NASA, JPL, Malin Space Science Systems ODEvidence for Recent Liquid
Creator-Photographer
NASA, JPL, Malin Space Science Systems ODEvidence for Recent Liquid
Creator-Photographer
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Original Source:
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DIGITAL
Original_Source
DIGITAL
Original Source
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