| Piú viste - A Tribute To Mars Global Surveyor |
Craters-Unnamed_Crater_in_Chrise_Planitia-MGS.JPGCrater with bright Windstreak in Chrise Planitia (Original NASA/MGS/MSSS b/w Frame)55 visiteCaption NASA originale:"This MGS-MOC image shows a (bright) wind streak created in the lee — such as the "downwind" side (ossìa il "lato sottovento") — of a crater in far eastern Chryse Planitia.
The winds responsible for the formation of the streak blew from the North-East to the South-West".
Location near: 21,5° North; 27,4° West
Image width: ~3 km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
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Aeolian_Features-Windstreak-MGS.JPGWindstreak in Cyane Fossae55 visiteCaption NASA originale:"This MGS-MOC image shows a light-toned wind streak created in the lee — such as the downwind side — of an impact crater in the Cyane Fossae Region of Mars. Winds blowing from the bottom (South) toward the top (North) swept this scene clean of fine, bright dust except for the dust that had accumulated in a few protected areas such as that in the lee of this crater".
Location near: 42,0° North; 125,8° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
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Troughs-Olympica_Fossae-MGS-03.JPGTroughs System in Olympica Fossae (Original NASA/MGS/MSSS b/w Frame)55 visiteCaption NASA originale:"This MGS-MOC image shows a wide, flat-floored Trough flanked by several smaller, branching Troughs in the Olympica Fossae Region of Mars. Dark and intermediate-toned Slope Streaks —both created by dry Avalanches of Dust — occur on the Trough Walls".
Location near: 25,1° North; 113,8° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
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Sysiphi_Planum-MGS-PCF-LXTT-02.JPGSysiphi Planum (Original NASA-MSSS RAW b/w Frame)55 visiteCaption NASA originale:"This MGS-MOC image shows a spine of material exposed in the Sisyphi Planum Region of Mars.
Gullies can be seen on the deeply-shadowed ridge slope.
Mass movement (landsliding - maybe?) has contributed to the erosion of this ridge and the creation of the apron of talus that surrounds it".
Location near: 70,7° South; 357,0° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
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Controversial_Features-The_Bridges_of_Meroe_Patera-MGS-2.jpgThe "White Bridges" of Meroe Patera (Original NASA/MGS/MSSS b/w Frame - EDM)55 visiteLi abbiamo chiamati "ponti", ma ovviamente si tratta di qualcosa di molto diverso da una serie di "ponti ad arco". Per il Dr Feltri si potrebbe trattare di enormi bio-strutture; per il Dr Skipper si tratta di ciclopici manufatti in parte sepolti.
La nostra posizione al riguardo di questi "Bianchi Ponti" i quali si vedono anche in altre Regioni Marziane è interlocutoria: sappiamo che si tratta di caratterizzazioni superficiali talmente peculiari da potersi definire, in tutta tranquillità, cime Anomalìe di Superficie (Anomalìe che la NASA e l'ESA, ovviamente, non vedono e non commentano...); sappiamo che non sono dune e che la loro morfologia NON sposa la morfologia dell'ambiente a cui esse accedono (e dunque sono rilievi - tecnicamente - "alieni") e che, con ogni probabilità, si tratta di rilievi (effettivamente) di dimensioni enormi i quali non hanno riscontri similari nè sulla Terra, nè su nessun altro Corpo del Sistema Solare.
Questi, a nostro parere, sono i fatti.
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Aeolian_Features-Dust_Devil-MGS-00.jpgRunning Winds... (Original NASA/MGS/MSSS b/w Frame)55 visiteCaption NASA originale:"This MGS-MOC image shows a bright plain West of Schiaparelli Crater, which is host to several features, some of them long-lived and others that are transient. The circular features scattered somewhat randomly throughout the scene are impact craters, all of which are in a variety of states of degradation.
Toward the right (Dx - South-West) corner of the image, there is a small hill surrounded by ripples of windblown sediment, and near the center (a little to the left) of the image, there is an active DD casting a shadow to the east as it makes its way across the plain".
Location near: 5,9° South; 348,2° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
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Volcanic_Features-Pits-A.jpgUnusually-looking Collapse Pits (Original NASA/MGS/MSSS b/w CTX Frame)55 visiteLocation near: 22,1° North Lat. and 53,2° East Long.
Image width: ~3 Km (~1,9 mi)
Season: Northern Spring
Resolution: 18 mt/pixel
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Northern_Regions-Mesas-MGS.jpgMesas in Vastitas Borealis (Original NASA/MGS/MSSS b/w frame)55 visiteCaption NASA originale:"This MGS-MOC image shows two mesas on the Northern Plains of Mars. "Mesa" is the Spanish word for "table" and that is a very good description of the two elliptical features captured in this MOC image. In both cases, the Mesa tops and the material beneath them, down to the level of the surrounding, rugged Plain, are remnants of a once more extensive layer (or layers) of material that has been largely eroded away. The circular feature near the center of the larger Mesa is the site of a filled and buried Impact Crater".
Location near: 53,5° North Lat. and 153,5° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
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North_Polar_Features-Dunes-MGS-07.jpgNorth Polar Dunes (Original NASA/MGS/MSSS b/w Frame)55 visiteCaption NASA originale:"This MGS-MOC image shows dunes in the Martian North Polar Region. The dunes are composed of dark, coarse (--> ruvido, di tessitura grossolana) sand. The white areas around the dunes are the last remaining areas of seasonal CO2 frost cover.
The solid CO2 accumulates during the Autumn and Winter and sublimes (goes from solid to gas) away in the Spring.
This image was taken near the end of the Northern Spring".
Location near: 78,0° North; 244,5° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
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Dunes-Ogygis_Region-MGS.jpgThe Dunes of Ogygis (Original NASA/MGS/MSSS b/w Frame)55 visiteCaption NASA originale:"This MGS-MOC image shows dark Sand Dunes, with a thin coating of Autumn Frost, in the Ogygis Regio, West of the Argyre Basin. The steepest Slopes on the Dunes (such as their "Slip Faces"), point toward the North-North/East (lower left), indicating that the Dominant Winds in the Region blow from the South-South/West (upper right)".
Location near: 50,4° South Lat. and 66,6° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
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Landslides-Tithonium_Chasma-MGS-01.jpgLandslide in Tithonium Chasma (2 - Original NASA/MGS/MSSS b/w Frame)55 visitenessun commento
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North_Polar_Features-Unconformities-01.jpgNorth Polar "Unconformities" (Original NASA/MGS/MSSS b/w Frame)55 visiteCaption NASA originale:"This MGS-MOC image shows Layers exposed in the North Polar Region of Mars. The North Polar Cap is underlain by a thick sequence of Layered Material. The Layers are most commonly exposed on the slopes of troughs that are believed to have formed by Wind Erosion. The Layers give a banded appearance. In this example, some of the Layers are cut off (truncated) by other Layers. This truncation is a classic, textbook example of an Erosional Unconformity, a term commonly used by geologists. The Unconformity occurs when deposition of new layered material stops for a while and erosion occurs. Then, new layers form on top of the eroded surface and the older layers, at some point in time when the erosion stops and deposition of layered material resumes".
Location near: 78,6° North Lat. and 342,0° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper right
Season: Northern Spring
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