| Piú votate - A Tribute To Mars Global Surveyor |
North_Polar_Features-Dunes-MGS-04.jpgNorth Polar Dunes (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)56 visitenessun commentoMareKromium
(7 voti)
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North_Polar_Features-Dunes-MGS-08.jpgNorth Polar Dunes (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)56 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 SpringMareKromium
(7 voti)
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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)55 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
(7 voti)
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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)62 visitenessun commentoMareKromium
(7 voti)
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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?!?...
(7 voti)
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North_Polar_Features-Dunes-MGS-07.jpgNorth Polar Dunes (Original NASA/MGS/MSSS b/w Frame)54 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
(7 voti)
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Volcanoes-The_FootPrint_Volcano-C-MGS.jpgThe "Footprint Volcano" (EDM taken from the Original NASA/MGS/MSSS b/w Frame) 71 visitenessun commento
(7 voti)
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Aeolian_Features-Dust_Devil-MGS-00.jpgRunning Winds... (Original NASA/MGS/MSSS b/w Frame)54 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
(7 voti)
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Aeolian_Features-Windstreak-MGS.JPGWindstreak in Cyane Fossae54 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
(7 voti)
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Channels-Auqakuh_Vallis-MGS.JPGAuqakuh Vallis: "Old Riverbed" or "Windblown Ripples"? (Original NASA/MGS/MSSS b/w Frame)57 visiteCaption NASA originale:"This MGS-MOC image shows windblown ripples on the floor of Auqakuh Vallis.
The light-toned area, running diagonally across the scene from South-West to North-East, may be dust that has accumulated in the bottom of the valley and on top of the ripples".
Location near: 31,3° North; 299,3° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
(7 voti)
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Volcanic_Features-Channels-Tharsis_Region-00.JPGChannels on Lava Flows in Tharsis (Original NASA/MGS/MSSS b/w Frame)54 visiteCaption NASA originale:"This MGS-MOC image shows ancient, Dust-covered Lava Flows and remains of leveed Lava Channels located on a Plain North/West of Jovis Tholus.
Jovis is a relatively small volcano in the Tharsis Region of Mars".
Location near: 22,4° North Lat. and 122,0° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
(7 voti)
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Troughs-Olympica_Fossae-MGS-02.jpgThe Troughs of Olympica Fossae (2 - Original NASA/MGS/MSSS b/w Frame)54 visiteCaption originale:"This MGS-MOC image shows a complex pattern of intersecting and overlapping Troughs in the Olympica Fossae Region of Northern Tharsis. Some combination of Floods, Lava Flows and faulting/tectonic activity contributed to this scene, followed by mantling by dust. Dark Streaks on Slopes in the Troughs were formed by Dust Avalanches".
Location near: 24,8° North Lat. and 114,8° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
(7 voti)
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