| Piú votate - A Tribute To Mars Global Surveyor |
Clouds-South_Polar_Regions-Chasma_Australe-2003_10_29_M0904025-PCF-LXTT-1.jpgFogs and Clouds over Chasma Australe (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)262 visitenessun commentoMareKromium
(3 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)81 visitenessun commentoMareKromium
(3 voti)
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HomePlate-s1200095_home_plate_resolution_065mt.jpgHome Plate, from orbit64 visitenessun commentoMareKromium
(3 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)65 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
(3 voti)
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Claritas_Fossae-Smoke-MU.gifDark Smoke moving over Claritas Fossae (GIF-Movie; credits: Mars Unearthed)75 visitenessun commentoMareKromium
(3 voti)
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South_Polar_Features-Swiss_Cheese.gifGlobal Warming on Mars (GIF-Movie; credits: Mars Unearthed)65 visitenessun commentoMareKromium
(3 voti)
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Inca-City-M0306902-00.jpgA true "South Polar Oddity": Inca City (2 - False Colors)69 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.
(3 voti)
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Dunes-S20-00165d-_acquired_july_2006-_11-8-06-A.jpgDark Dunefield? (Original NASA/MGS/MSSS b/w Frame)77 visiteA nostro parere la "chiazza scura" che ci stata segnalata dal Dr Barca e che caratterizza un'ampia porzione di questo frame non un'ombra, bens - dopo aver operato alcune comparazioni visive con altri frames similari - un "affioramento" di un qualche tipo (una "macchia" della superficie - simile ai "seeps" - che pu essere indice della presenza di idrocarburi affioranti o, pi spesso, dell'esposizione del suolo post evaporazione di ghiacci superfciali o sublimazione di ghiacci di CO2); da non escludersi la possibilit 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 pu notare che quando le lune di Marte proiettano ombra sulla Superficie del Pianeta, l'effetto visivo molto diverso da quello che vediamo in questo frame.
(3 voti)
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Craters-Unnamed_Craters-Syrtis_Major.jpgUnnamed Craters in Syrtis Major Planum (Original NASA/MGS/MSSS b/w Frame)63 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
(3 voti)
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Chaotic_Terrain-Aram_Chaos-R2200155-11.jpgThe "Many Faces" of Aram Chaos (12 - EDM n. 11 - Original NASA/MGS/MSSS b/w Frame)90 visitenessun commento
(3 voti)
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Dunes-Brashear_Crater-PIA03656-00.jpgDark Dunes on Brashear Crater's Floor (Original NASA/MGS/MSSS b/w Frame)65 visiteOriginal caption:"This MGS-MOC image shows a field of Dark Sand Dunes on the North/Western side of the Floor of Brashear Crater. The Dunes formed largely from Winds that blew from the South-East (lower right)".
Location near: 253,7 South Lat. and 119,4 West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
(3 voti)
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Channels-Inverted_Channels_in_Arabia_Terra-PIA03643-02.jpgInverted channels of Arabia Terra (2 - Original NASA/MGS/MSSS b/w Frame)69 visiteOriginal caption:"This MGS-MOC image shows a somewhat sinuous, nearly flat-topped Ridge, located in Eastern Arabia Terra. The ridgetop was once the Floor of a Valley, perhaps carved by running water. The Valley Floor, or material that covered the Floor, was more resistant to erosion than the surrounding rock into which the Valley was cut. Thus, over time, the Valley disappeared and its Floor was left standing high as a Ridge. Inverted Valleys are common on Mars, but they also occur on Earth".
Location near: 10,8 North Lat. and 313,2 West Long.
Image width: width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
(3 voti)
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