| Piú votate - A Tribute To Mars Global Surveyor |
Thaumasia_Region-M1700805-PCF-LXTT.jpgA "Lake of Sand" in Thaumasia Region (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia)143 visitenessun commentoMareKromium
(2 voti)
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Craters-Unnamed_Crater_in_Hellas_Planitia-1-MGS.jpgUnnamed Crater in Hellas Planitia (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)216 visiteCaption NASA originale:"This MGS-MOC image shows a large crater that formed by meteor impact into the layered material in which the buried crater is encased. The layered rock, in this case, has a light tone similar to the sedimentary rocks being explored by the MER Opportunity, thousands of kilometers away in Sinus Meridiani".
Location near: 24,9° South; 299,3° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer MareKromium
(2 voti)
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Tharsis_Region-Pit_Chain-MGS-PIA03930-PCF-LXTT.jpgCollapse Pit-Chain in Tharsis Region (Absolute Natural Colors; credits for the additional process. and color: Dr Paolo C. Fienga - Lunexit Team)271 visitenessun commentoMareKromium
(2 voti)
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Craters-Unnamed_Crater-AB107707-00-PCF-LXTT.jpgUnnamed Crater with wide Dunefield (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)86 visitenessun commentoMareKromium
(2 voti)
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Echus_Chasma-PIA08022-2-PCF-LXTT.jpgEchus Chasma (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)74 visitenessun commentoMareKromium
(2 voti)
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HomePlate-s1200095_home_plate_resolution_065mt.jpgHome Plate, from orbit56 visitenessun commentoMareKromium
(2 voti)
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Gullies-Hellas_Planitia-MGS~2.jpgGullies in Hellas Planitia (Absolute Natural Colors; credits for the additional process. and color.: Dr G. Barca - Lunexit Team)57 visiteCaption NASA originale:"This MGS-MOC image shows neighboring networks of gullies in the NorthWestern wall of a South, middle-latitude, crater West of Hellas Planitia. The faint crisscrossing streaks, also observed on the wall of the crater, are evidence of passing Dust Devils, a common phenomena in this Region.
The gullies might have formed by erosion caused by running water, mixed with debris".
Location near: 54,0° South; 337,1° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern SummerMareKromium
(2 voti)
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Inca-City-M0306902-00.jpgA true "South Polar Oddity": Inca City (2 - False Colors)60 visite"Inca City" is the informal name given by Mariner 9 Scientists in 1972 to a set of intersecting, rectilinear ridges that are located among the layered materials of the South Polar Region of Mars. Their origin has never been understood; most investigators thought they might be sand dunes, either modern dunes or, more likely, dunes that were buried, hardened, then exhumed. Others considered them to be dikes formed by injection of molten rock (magma) or soft sediment into subsurface cracks that subsequently hardened and then were exposed at the surface by wind erosion.
(2 voti)
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Dunes-S20-00165d-_acquired_july_2006-_11-8-06-A.jpgDark Dunefield? (Original NASA/MGS/MSSS b/w Frame)68 visiteA nostro parere la "chiazza scura" che ci è stata segnalata dal Dr Barca e che caratterizza un'ampia porzione di questo frame non è un'ombra, bensì - dopo aver operato alcune comparazioni visive con altri frames similari - un "affioramento" di un qualche tipo (una "macchia" della superficie - simile ai "seeps" - che può essere indice della presenza di idrocarburi affioranti o, più spesso, dell'esposizione del suolo post evaporazione di ghiacci superfciali o sublimazione di ghiacci di CO2); da non escludersi la possibilità che si tratti di un reticolato - non risolvibile con questa bassa definizione - di Dark Dunes (insomma: un Dunefield a bassa albedo).
Le uniche ombre significative ed oggettivamente visibili dalle varie Sonde che orbitano attorno a Marte sono quelle di Deimos e Phobos, quando producono una Eclissi Solare. Tuttavia, esaminando qualche frames relativo ad Eclissi viste dall'orbita, si può notare che quando le lune di Marte proiettano ombra sulla Superficie del Pianeta, l'effetto visivo è molto diverso da quello che vediamo in questo frame.
(2 voti)
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Craters-Unnamed_Craters-Syrtis_Major.jpgUnnamed Craters in Syrtis Major Planum (Original NASA/MGS/MSSS b/w Frame)54 visiteCaption NASA originale:"This MGS-MOC image shows a portion of Syrtis Major Planum, dominated in this area by two Impact Craters of differing age. The large one is about 1,3 Km (approx. 0,8 miles) in diameter, the smaller is about 250 mt (~820 feet) across.
The smaller Unnamed Crater has a well-defined Ejecta Blanket and Rays emanate outward from its center. The larger Unnamed Crater does not exhibit these features. The larger one is older, and its Ejecta Blanket and Rays have been removed and degraded over time".
Location near: 5,4° North; 294,2° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Northern Spring
(2 voti)
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North_Polar_Features-Frosted_Dunes-Plumage-MGS.JPGNorth Polar "Frosted Dunes" (Original NASA/MGS/MSSS b/w Frame)59 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
(2 voti)
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Aeolian_Features-Dust_Devil-Argyre_Planitia.JPGDust Devil in Argyre Planitia (Original NASA/MGS/MSSS b/w Frame)61 visiteCaption NASA originale:"This MGS-MOC image shows Dust Plumes created by gusting winds on a Plain SouthWest of Argyre Planitia".
Location near: 67,0° South; 75,2° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
(2 voti)
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