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as17-152-23328.jpgAS 17-152-23328 - Lunar Maria: Crisium and Tranquillitatis (elab. in true colors by Lunexit)58 visitenessun commentoMareKromium
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A-Phoenix-000.jpgThe (fully assembled) Phoenix Mars Lander58 visitenessun commentoMareKromium
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A-Phoenix-006.jpgLooking at the Twilights...58 visitenessun commentoMareKromium
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North_Polar_Regions-Chasma_Boreale-MGS-01.jpgBrown Dunes in Chasma Boreale (Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)58 visitenessun commentoMareKromium
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North_Polar_Features-Dunes-MGS-01.jpgNorth Polar Dunes (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)58 visiteCaption NASA originale:"This MGS-MOC image shows dunes in the North Polar Region of Mars. In this Springtime view, the dunes are largely covered by frozen Carbon Dioxide (CO2) that was deposited during the Winter months in the Northern Hemisphere. Dark spots indicate areas where the frost has begun to either sublime away, acquire a roughened texture, or both".
Location near: 77,3° North; 95,4° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern SpringMareKromium
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The_Rings-PIA08999.jpgSidelong View58 visiteCaption NASA:"Saturn's enchanting rings display crisply defined edges and strong contrast on their unilluminated side. Atlas (32 Km, or about 20 miles across) sits on the far side of the Rings above center, between the "A" and "F" Rings. This view was acquired from about 1° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 21, 2007 at a distance of approx. 2,4 MKM (about 1,5 MMs) from Atlas. Image scale is roughly 14 Km (about 9 miles) per pixel".MareKromium
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OPP-SOL1254-1P239512176EFF85W0P2351L7M1.jpgRover Tracks and bright "berries" all over... - Sol 1254 (False Colors; credits: Lunexit)58 visiteUna splendida immagine dei Berries che circondano Opportunity ci arriva (diremmo finalmente!) da Meridiani Planum, Sol 1254. Forse la tempesta di sabbia che aveva messo in pericolo la sopravvivenza dei MER si sta esaurendo e, forse, è ancora presto per dichiarare il cessato allarme.
Comunque sia, questa immagine (assieme a molte altre appena pervenute e da poco processate e colorizzate) ci dimostra che Opportunity è ancora in eccellente salute e riesce a fare il proprio lavoro egregiamente.
Noi - in tutta sincerità - non ne abbiamo mai dubitato.MareKromium
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OPP-SOL1255-1N239597006EDN85W0P1550L0M1.jpgThere's still a "dark reddish sky" over Opportunity... - Sol 125558 visiteElaborazione in colori naturali del Cielo di Marte così come potrebbe e dovrebbe apparire ai nostri occhi durante questi giorni di "oscurità" (rectius: di elevatissima Opacità Atmosferica).
MareKromium
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PSP_004708_1000_RED_browse-01.jpgFault in the South Polar Layered Deposits (EDM - Extremely Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)58 visiteThe figure shown here is a cutout of the previous frame (1,8 Km across, or about 1,1 mile) showing a very interesting and smewhat rare feature: a fault. The fault is the thin, diagonal line that cuts through most of the image, from near the lower left corner to near the upper right corner. On each side of the fault, the layers that cross the fault are slightly off-set from one other; in other words, the layers don't line-up with each other anymore. The relationship between the angles at which the layers and fault are exposed and the movement along the fault is complex, but, in general, the layers on the left side of the fault are slightly lower than those on the right.MareKromium
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PSP_004708_1000_RED_browse-00.jpgFault in the South Polar Layered Deposits (CTX Frame - Extremely Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)58 visiteThis image spans a section of the south polar layered deposits (SPLD). The SPLD are composed of layers of water ice mixed with impurities (mostly dust). The most similar terrestrial analog to the SPLD are ice sheets, like those covering most of Greenland and Antarctica.
Faults are created when rock (or, in this case, water ice) breaks due to some outside force and rocks (or ice) along either side of that break move in opposite directions. One of the most famous faults on Earth is the San Andreas Fault in California. There is a crack between the floor of the Pacific Ocean, plus a little bit of the California and Mexico coastline, and the rest of North America; the Pacific Ocean floor is moving northward along that crack, but North America is moving southward. Because the two sides are grinding against each other, they sometime stick together and then move again in jerky fashion, much like the way if you try to rub pieces of rough sand paper together. When movement along the fault occurs after a period of sticking together, this creates an earthquake.
For the case of this fault on Mars, it is unlikely that a "Marsquake" occurred when movement happened along this fault, because it is so small (over 1000 times shorter than the San Andreas Fault). This is interesting because faults are rare in the Martian polar layered deposits. The fault may have been created during widespread flow of the SPLD. Some of the stiffer ice could not flow and broke instead. Ice can only flow fast enough to create faults when it is relatively warm. Similarly, if you cool molasses enough, it becomes hard and doesn't flow. But the temperatures on Mars today are probably not warm enough to allow the creation of faults. This is why faults are so rare in the Martian ice. When were temperatures warm enough? This is still a mystery.
MareKromium
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OPP-SOL795-1P198781216ESF6900P2673R2M1.jpgSunset on Mars, with "lights" in the Sky (1) - Sol 795 (possible natural colors - elab. Lunexit)58 visiteUn'ipotesi: e se le due "luci nel tramonto" fossero Deimos e Phobos (visibili grazie ad una esposizione leggermente più lunga la quale fu anche causa, come ovvio, dell'image artifact che domina la porzione superiore del Sole calante)?MareKromium
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PSP_003252_1425_RED_browse-02.jpgBright Gully Deposit in Terra Sirenum (the "gully" - close-up; false colors)58 visiteThe bright gully deposit has a very fluid-like appearance, and has not been covered by other gullies or debris flows, indicating a young age. The brightness is a mystery; it could be due to minerals formed from water or ice.
Alternatively, the flow that made the gully may have removed a thin coating of relatively darker dust and soil, revealing a brighter substrate.
In any case, this feature is probably indicative of recent flow of water or water-rich material on Mars.MareKromium
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