A Tribute To Mars Global Surveyor
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Craters-Unnamed_Crater_with_Gullies-MGS-0.jpgUnnamed Crater with Gullies (Original NASA/MGS/MSSS b/w Frame)59 visiteCaption NASA originale:"This MGS-MOC image shows gullies and cracked and stressed gully apron deposits in a South mid-Latitude crater. Gullies can also be seen in the deep shadow on the North wall of the crater. These gullies might have formed by the erosive action of liquid water, sometime in the not-too-distant martian past".
Location near: 36,7° South; 206,2° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
Nota: attenzione a quello che la NASA ha scritto in sede di commento: adesso il passato al quale fare riferimento per pensare ad acqua che scorre "allo stato liquido" su Marte non è più remoto (un miliardo di anni o giù di lì); adesso questo passato è "...not too distant..." e cioè "passato prossimo". RicordateVi, in futuro, di quello che stiamo scrivendo da mesi: un frame dopo l'altro ed una parola dopo l'altra, la NASA si sta (lentamente ma) costantemente ridefinendo in chiave possibilista molte delle proprie posizioni (da anni più che consolidate) su molti aspetti/enigmi del Pianeta Rosso.
A quando l'ammissione di una "forma vitale" attuale, magari sotterranea?!?...
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Craters-Unnamed_Crater_with_Gullies-MGS-1-PCF-LXTT.jpgUnnamed Crater with Gullies (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia)56 visiteCaption NASA originale:"This MGS-MOC image shows Gullies and cracked and stressed Gully-Apron Deposits in a South Mid-Latitude Unnamed Crater. Gullies can also be seen in the deep shadow on the North Wall of the Crater. These Gullies might have formed by the erosive action of liquid water, sometime in the not-too-distant Martian Past".
Location near: 36,7° South; 206,2° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
Nota: attenzione a quello che la NASA ha scritto in sede di commento: adesso il passato al quale fare riferimento per pensare ad acqua che scorre "allo stato liquido" su Marte non è più remoto (un miliardo di anni o giù di lì); adesso questo passato è "...not too distant..." e cioè "passato prossimo". RicordateVi, in futuro, di quello che stiamo scrivendo da mesi: un frame dopo l'altro ed una parola dopo l'altra, la NASA si sta (lentamente ma) costantemente ridefinendo in chiave possibilista molte delle proprie posizioni (da anni più che consolidate) su molti aspetti/enigmi del Pianeta Rosso.
A quando l'ammissione di una "forma vitale" attuale, magari sotterranea?!?... MareKromium
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Craters-Unnamed_Crater_with_Intra-crater_Dunes-M0700566-00.jpgIntra-Crater Dunes (CTX Frame - Extremely Enhanced and Saturated Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)57 visitenessun commento
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Craters-Unnamed_Crater_with_Intra-crater_Dunes-M0700566-01.jpgIntra-Crater Dunes (EDM)60 visitenessun commento
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Craters-Unnamed_Crater_with_Pedestal-MGS.jpgUNnamed "Pedestal Crater"56 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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Craters-Unnamed_Crater_with_Pedestal-MGS.jpgAnother "Pedestal Crater" (Enhanced Natural Colors; credits for the additioanl process. and color.: Dr Paolo C. Fienga - Lunexit Team)61 visitenessun commentoMareKromium
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Craters-Unnamed_Crater_with_Pedestal-PIA08029.jpgUnnamed Pedestal Crater in Promethei Terra (Original NASA/MGS/MSSS b/w Frame)54 visiteCaption NASA originale:"This MGS-MOC image shows a Pedestal Crater in the Promethei Terra Region. The Ejecta from an impact crater is usually rocky. The rocks in the Ejecta help shield the Terrain beneath the Ejecta from being eroded away by Wind. Thus, over time, some Craters appear to be raised on Pedestals defined by their Ejecta Blankets, because Wind has stripped away tons and tons of surrounding material".
Location near: 65,4° South Lat. and 264,7° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
Nota: un altro (relativamente) famoso cratere con (o su) piedistallo si trova su Venere ed è conosciuto con il nome di Cratere Adivar.
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Craters-Unnamed_Crater_with_Tiled_Floor-MGS-PCF-LXTT.jpgUnnamed Crater in Vastitas Borealis (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit) 218 visiteCaption NASA originale:"This MGS-MOC image shows Polygonal Cracks formed in the material that nearly fills an Impact Crater on the Martian Northern Plains. The light-toned patches in the Cracks are the remains of Ice, left over from the preceding Winter.
On Earth, Polygons such as these are most common in the Polar Regions and form in the presence of ground ice. Whether the same is true for Mars remains to be determined, but, certainly, this is a good possibility".
Location near: 65,7° North; 277,5° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring MareKromium
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Craters-Unnamed_Crater_with_Windstreak-PIA07508-00.jpgUnnamed Crater with Windstreak (Original NASA/MGS/MSSS b/w Frame)67 visiteCaption NASA originale:"This MGS-MOC image shows a 1,2 Km North Mid-Latitude Unnamed Crater with a bright Windstreak".
Location near: 30,8° North Lat. and 131,8° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Summer
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Craters-Unnamed_Crater_with_Windstreak-PIA07508-01.jpgUnnamed Crater wth Windstreak (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)231 visiteCaption NASA originale:"This MGS-MOC image shows a 1,2 Km North Mid-Latitude Unnamed Crater with a bright Windstreak".
Location near: 30,8° North Lat. and 131,8° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Summer
MareKromium
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Craters-Unnamed_Crater_with_Windstreak.JPGCrater and Windstreak in Syrtis Major Planum (Original NASA/MGS/MSSS b/w Frame)57 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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Craters-Unnamed_Crater_with_Windstreak_in_Sirtis_Major_Planum-PCF-LXTT.jpgCrater and Windstreak in Syrtis Major Planum (Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga)77 visitenessun commentoMareKromium
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