| Piú viste - A Tribute To Mars Global Surveyor |
Craters-Unnamed_Crater_with_Windstreak.JPGCrater and Windstreak in Syrtis Major Planum (Original NASA/MGS/MSSS b/w Frame)58 visiteCaption originale:"This MGS-MOC image shows an Unnamed Crater that is approx. 2 Km in diameter in South Central Syrtis Major Planum. The image also captures a portion of the light-toned Windstreak formed in the Lee (---> lato sottovento) of the Unnamed Cater. The Windstreak is likely composed of a thin coating of Dust".
Location near: 1,9° North Lat. and 294,0° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Northern Summer
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Chaotic_Terrain-Aram_Chaos-R2200155-03.jpgThe "Many Faces" of Aram Chaos (4 - EDM n. 3 - Original NASA/MGS/MSSS b/w Frame)58 visiteIl Dr Skipper, da Ricercatore equilibrato quale è, non sembra optare in maniera netta e decisa (come invece fa il Prof. Hoagland e la sua Scuola) verso l'ipotesi "artificiale e tecnologica" di alcuni degli stranissimi rilievi di Aram Chaos, ma la possibilità - più o meno remota - che qualcuno o qualcosa stia cercando di preservare qualche frammento del "Marte che fu" non è da buttar via aprioristicamente.
Ciò su cui Skipper sembra essere davvero certo, invece, è lo status attuale di Aram Chaos: un tempo un grande lago, oggi un'area soggetta a desertificazione e progressivo inaridimento.
"The older more ancient ecology was no doubt one of a lake in this crater depression. The more recent ecology then is one of a gradually drying old lake bed with diminishing shallow water flowing down many elevated slopes and grades in this generally rough uneven terrain accumulating in the bottom lowest depression catch basin areas. I suspect that some kind of life as represented by the ridge form evidence has followed the receding shallow water flows spreading down the slopes and grades in this shrinking water environment. The orientation of the ridge form evidence many parallel ridges identifies the direction of the shallow water flow down between the ridges as what ever life this represents attempts to follow and husband this gradually diminishing natural resource"
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Craters-Unnamed_Crater_in_Terra_Sabaea-02.jpgUnnamed Crater in Terra Sabaea (Original NASA/MGS/MSSS b/w Frame)58 visiteCaption originale:"This MGS-MOC image shows a 1,5 mt (~5 feet) per pixel view of an Impact Crater that is approximately 3 Km (about 9840 ft) in diameter. It is located in South-Western Terra Sabaea".
Location near: 21,9° South Lat. and 338,6° West Long.
Image width: ~3 km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
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Noachis_Terra-00.JPGFeatures of Noachis Terra (Original NASA/MGS/MSSS b/w Frame)58 visiteCaption NASA Originale:"This MGS-MOC image shows the edge of a trough, which is part of a large pit crater complex in Noachis Terra. This type of trough forms through the collapse of surface materials into the subsurface and often begins as a series of individual pit craters. Over time, continued collapse increases the diameter of individual pits until finally, adjacent pits merge to form a trough such as the one captured in this image. The deep shadowed area is caused in part by an overhang; layered rock beneath this overhang is less resistant to erosion, and thus has retreated tens of meters backward, beneath the overhang. A person could walk up inside this "cave" formed by the overhanging layered material".
Location near: 47,0° South; 355,7° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
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Volcanic_Regions-Rocky_Outcrops-MGS-00.JPGStreamlined Rocky Outcrops near Olympus Mons (Original NASA/MGS/MSSS b/w Frame)58 visiteCaption NASA originale:"This MGS-MOC image shows wind-eroded Outcrops overlying Lava Flow Surfaces located to the West of Olympus Mons. Outcrops with this appearance are also called Yardangs. Yardangs typically form in Sedimentary Rock or Volcanic Ash that contains some amount of Sand. The weathering of the Rock due to the Aeolian action cause the release of sand-sized particles from the Outcrops and, in time, such a form of erosion slowly shape the rock into the classic, inverted boat hull-like shapes of Yardangs".
Location near: 13,2° North Lat. and 160,1° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
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South_Polar_Features-Swiss_Cheese_Terrain-04.jpgThe "drawings" of the South Polar Residual Cap (2)58 visitenessun commento
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Channels-Evros_Vallis-MGS.JPGEvros Vallis (Original NASA/MGS/MSSS b/w Frame)58 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
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Channels-Auqakuh_Vallis-MGS.JPGAuqakuh Vallis: "Old Riverbed" or "Windblown Ripples"? (Original NASA/MGS/MSSS b/w Frame)58 visiteCaption NASA originale:"This MGS-MOC image shows windblown ripples on the floor of Auqakuh Vallis.
The light-toned area, running diagonally across the scene from South-West to North-East, may be dust that has accumulated in the bottom of the valley and on top of the ripples".
Location near: 31,3° North; 299,3° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
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Volcanoes-Unnamed_Volcano_in_Syria_Planum-MGS.jpgBuried Volcano in Syria Planum (Original NASA/MGS/MSSS b/w Frame)58 visiteCaption NASA originale:"This MGS-MOC image shows a small Volcano in the Syria Planum Region of Mars. Today, the Lava Flows that compose this small Volcano are nearly hidden by a mantle of rough-textured, perhaps somewhat cemented, Dust. The light-toned Streaks that cross the scene were formed by passing Dust Devils, a common occurrence in Syria".
Location near: 13,0° South Lat. and 102,6° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
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North_Polar_Features-North_Polar_Scarp-MGS-00.jpgNorth Polar Panorama (Original NASA/MGS/MSSS b/w Frame)58 visiteCaption NASA originale:"This MGS-MOC image shows a steep slope in the North Polar Region of Mars. The stripes indicate an exposure of layered material; the variations in brightness among the stripes are the result of varying amounts and textures on seasonal Carbon Dioxide (CO2) frost. At the time the image was acquired - such as in June 2006 -, the Carbon Dioxide frost was beginning to sublime way, leaving a variety of different patterns in frost distribution".
Location near: 85,2° North Lat. and 122,7° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
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Craters-Unnamed_Crater_with_Pedestal-MGS.jpgUNnamed "Pedestal Crater"58 visiteCaption NASA originale:"This MGS-MOC image shows a "pancake" or "pedestal" crater on the Martian Northern Plains. The rocky ejecta from the crater protected the underlying material from being stripped away by wind, leaving the ejecta standing higher than the surrounding terrain. The rocks in the ejecta are not too clearly seen today, especially at the 6 mt (~20 feet) per pixel scale of this image, in part because they have been covered up by later, mantling material".
Location near: 60,0° North; 265,6° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
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Aeolian_Features-Yardangs-Terra_Sabaea-MGS-01.jpgYardangs in Terra Sabaea (2 - Original NASA/MGS/MSSS b/w Frame)58 visiteLocation near: 1,4° North Lat. and 333,9° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Northern Spring
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