| Piú votate - A Tribute To Mars Global Surveyor |
Troughs-Labeatis_Fossae-MGS.jpgDeep Trough in Labeatis Fossae (Original NASA-MGS-MSSS b/w Frame) 66 visiteCaption NASA originale:"This MGS-MOC image shows a portion of a trough cutting across a dust-covered plain in the Labeatis Fossae Region of Mars. Boulders derived from the layered exposures near the top of the trough walls are resting on the floor, and in some locations, the sloping sidewalls of the dusty trough".
Location near: 22,1 North; 94,5 West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
(5 voti)
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Craters-Galle_Crater-3D.jpgLayers of Galle Crater (3D - credits: NASA/JPL/MSSS)67 visiteCaption NASA:"This is a 3-D stereo anaglyph showing layers in Galle Crater. This anaglyph uses two MGS-MOC images acquired at slightly different viewing angles: MOC images E22-01557 and M14-02055. Owing to the specifics of the viewing geometry, the image is tilted on its side, relative to the mosaic shown in the 15 June 2006 release. In other words, in this image, North is toward the right and West is up. This anaglyph, when viewed in conjunction with the 15 June 2006 mosaic of these layers, provides a more complete sense of the cross-cutting relations between layers in the mound located in southern Galle (Happy Face) Crater. The layers are part of a mound of sedimentary rock in southern Galle a remnant of a once more-extensive deposit of sedimentary material in this south mid-latitude impact basin.
Location near: 52,3 South Lat. and 30,1 West Long.
Image width: ~7,3 Km (~4,5 mi)
Illumination from: upper right
Anaglyph from MOC images: E22-01557 and M14-02055
(5 voti)
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North_Polar_Features-Dunes-MGS-03.JPGNorth Polar Dunes (Original NASA/MGS/MSSS b/w Frame)75 visiteCaption NASA originale:"This MGS-MOC image shows dunes covered with a seasonally-deposited layer of solid Carbon Dioxide (CO2) in the North Polar Region of Mars. The dark spots indicate areas where the CO2 frost has begun to change, either by being sublimed away, or by becoming rougher or coarser-grained, such that it appears darker than surrounding frost. Over the course of the Spring season, the frost will be completely removed and the dark sands that make up the dune field will be visible by Summer".
Location near: 77,7 North; 41,7 West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
(5 voti)
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Volcanic_Features-Collapse_Pit_Chain-MGS.JPGCollapse Pit-Chain in Tharsis Region (Original NASA/MGS/MSSS b/w Frame)83 visiteCaption NASA originale:"This MGS-MOC image shows a chain of collapse pits on a dust-mantled, lava-covered plain North-East of Ascraeus Mons (one of the giant volcanoes located in the Tharsis Region of Mars).
Pit chains are associated with collapse which may be driven by several processes including, but not limited to, crustal extension owing to tectonic processes and the collapse of the roof of a lava tube".
Location near: 14,8 North Lat. and 99,1 West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
(5 voti)
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Clouds-Hellas_Planitia-MGS.JPGHeavy Dusty Clouds obscuring Hellas Planitia (Original NASA/MGS/MSSS b/w Frame)67 visiteCaption NASA originale:"This MGS-MOC image shows billowing clouds of dust rising from a storm South-East of Hellas Planitia.
The dust storm in this case obscured the Mars Orbiter Camera's view of the Martian Surface".
Location near: 62,2 South; 259,0 West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
(5 voti)
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South_Polar_Features-Residual_Cap.JPGSouth Polar "Shoreline" (Original NASA/MGS/MSSS b/w Frame)74 visiteCaption NASA originale:"This MGS-MOC image shows the very edge of the South Polar Residual Cap of Mars. The bright areas, which appear somewhat like pieces of sliced "Swiss cheese", are composed mainly of frozen Carbon Dioxide. The Scarps around the edges of the Carbon Dioxide mesas have been retreating at a rate of roughly 3 mt (~3 yards) per Martian Year; in this case, exposing a darker surface that lies below".
Location near: 85,4 South; 88,6 West
Image width: ~3 km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
(5 voti)
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Channels-Evros_Vallis-MGS.JPGEvros Vallis (Original NASA/MGS/MSSS b/w Frame)70 visiteCaption NASA originale:"This MGS-MOC image shows a small portion of Evros Vallis, an ancient Channel located South of the large Impact Basin, Schiaparelli. In this image, the Walls and Floor of the Valley, as well as the adjacent upland, are all mantled by Dust. In addition to the Dust Mantle, large, windblown Ripples occur in low-lying areas, particularly on the Valley Floor. The Ripples, also, have been covered by Dust".
Location near: 12,7 South Lat. and 346,7 West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
(5 voti)
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South_Polar_Features-Swiss_Cheese_Terrain-04.jpgThe "drawings" of the South Polar Residual Cap (2)71 visitenessun commento
(5 voti)
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South_Polar_Features-Swiss_Cheese_Terrain-03.jpgThe "drawings" of the South Polar Residual Cap (1)68 visiteCaption NASA originale:"This MGS-MOC image shows a Summertime view of the South Polar Residual Cap of Mars. In this image, mesas composed largely of solid Carbon Dioxide are separated from one another by irregularly-shaped depressions. The variation in brightness across this scene is a function of several factors including, but not limited to, varying proportions of dust and solid Carbon Dioxide, undulating topography, and differences in the roughness of the slopes versus the flat surfaces".
Location near: 86,7 South; 343,3 West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
(5 voti)
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North_Polar_Features-Frosted_Dunes-Plumage-MGS.JPGNorth Polar "Frosted Dunes" (Original NASA/MGS/MSSS b/w Frame)67 visiteCaption NASA originale:"This MGS-MOC image shows Dunes in the North Polar Region of Mars.
The Dunes in this scene are covered by a layer of Carbon Dioxide Frost that accumulated during the Winter in 2005.
Dark spots indicate areas where Frost has begun to sublime away. In Summer, the Dunefield will be dark, as all of the Frost will be gone and the Iron- and Magnesium-bearing Silicate Sands will be exposed".
Location near: 81,9° North Lat. and 226,1° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
(5 voti)
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South_Polar_Features-Swiss_Cheese_Terrain-01.jpgSummertime at the South Pole (1)68 visiteCaption originale NASA:"This MGS-MOC image shows an undulating scene in the South Polar Region of Mars. Small, elevated mesas of smooth, relatively homogeneous-appearing material are separated by low-lying regions that are speckled and darkened in some local areas. Over the Martian Summer months, sublimation of solid carbon dioxide the bright material in the scene contributes to the darkening of the sides of the mesas as well as the low-lying regions between them".
Location near: 86,8 South; 341,3West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
(5 voti)
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Dunes-Noachis_Terra-00.jpgDark Dunes in Noachis Terra (Original NASA/JPL/MSSS b/w Frame)70 visiteCaption originale:"This MGS-MOC image shows Dark Sand Dunes and relatively small, light-toned, windblown Ripples on the Floor of an Unnamed Crater located in central Noachis Terra".
Location near: 50,0 South Lat. and 353,7 West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
(5 voti)
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