| Piú viste - Mars Reconnaissance Orbiter (MRO) |
PSP_003426_2035_RED_abrowse-PCF-LXTT.jpgFaults and Channels in Elysium Mons (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)111 visitenessun commentoMareKromium
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Mawrth_Vallis.jpgExtremely unusually-looking Surface Feature in Mawrth Vallis (an Image-Mosaic by Dr Marco Faccin - Lunexit Team)111 visitenessun commentoMareKromium
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ESP_020204_1835_RED_abrowse-01.jpgNorthern Meridiani Planum (EDM - Enhanced Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team:) 111 visitenessun commentoMareKromium
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ESP_020797_1280_RED_abrowse-01.jpgPossible Active Gullies' Activity on a Southern Dunefield (Natural Colors; credits for the coloring: Dr Paolo C. Fienga - Lunexit Team)111 visitenessun commentoMareKromium
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PSP_002542_1080_red-1.jpgDefrosting Dunefield (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)111 visiteThis image is a close-up view of defrosting patterns on the Dunes located at the bottom of Richardson Crater. The Frost is a combination of frozen CO2 and some water ice that covers the Dunes in the Winter and Spring. As the seasonal Frost sublimes away, odd features such as Spots, Fans and Streaks form. Small Dark Streaks on the Dune "Slip-Face" Slopes may be where recent avalanches of sand, or perhaps wind, has moved the dark sand underlying the Frost, or where frost has been removed to expose the sand. Alternatively, the Dark Streaks may be patches of coarse-grained ice that are clear enough so that the dark material below the ice is visible. The Slip-Faces indicate that the general direction of sand transport is (meaning the that the Dominant Winds blow) from the right to the left across the image.
It has been hypothesized that the Dark Spots and Fans may be "Geysers" or "Cold Gas Jets" that form when sublimation processes trap gas at the bottom of the ice. The gas is released through cracks in the ice, entraining Dust from below the ice and scattering it onto the Surface to form the Dark Spots and Fans. The high resolution, stereo, and low light imaging capabilities of HiRISE has provided new insight into the processes that form these features. Repeated imaging in a variety of locations will provide a record of their development and evolution. MareKromium
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ESP_025387_1555-PCF-LXTT-001.jpgUnnamed Crater and a "patch" of bright Bedrock (EDM - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)111 visiteMars Local Time: 14:58 (early afternoon)
Coord. (centered): 24,4° South Lat. and 341,2° East Long.
Spacecraft altitude: 260,1 Km (such as about 162,5 miles)
Original image scale range: 26,9 cm/pixel (with 1 x 1 binning) so objects ~ 78 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 6,5°
Sun - Mars - MRO (or "Phase") Angle: 57,1°
Solar Incidence Angle: 61° (meaning that the Sun is about 29° above the Local Horizon)
Solar Longitude: 48,6° (Northern Spring)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer Italia MareKromium
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ESP_016916_1655_RED_abrowse-00.jpgLinear Dunes and Sand Sheets inside Herschel Crater (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)110 visitenessun commentoMareKromium
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ESP_019197_2290_RED_abrowse-01.jpgExtremely unusually-looking Unnamed Northern Crater (EDM n.1 - Absolute Natural Colors; credits for the additional process. and color.: Drr Gianluigi Barca and Paolo C. Fienga - Lunexit Team)110 visitenessun commentoMareKromium
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PSP_002070_2250_RED_abrowse-03.jpgPolygons in Utopia Planitia (EDM - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team) 110 visiteOn the Surface surrounding the "Scalloped Depressions" there are several large Boulders (see this EDM). Sources for these rocks may include Ejecta from nearby Craters, Volcanic Floods, or Boulders emplaced by Glaciers or Periglacial Processes.
Also on the surrounding Surface is a Polygonal Pattern of Fractures. This is commonly associated with Scalloped Terrain, and indicates that the Surface has undergone stress, potentially caused by Subsidence, Desiccation, or Thermal Contraction.
Variations in the sizes of the Polygons seems to be partly dependant on their location with small Polygons appearing within the Scallops and larger Polygons appearing outside the Scallops on the Surface of the Mantle. Several cracks cut through the side of the Scallops indicating that they must be at least as deep as the Scallops. The Polygons may have been present previous to the erosion of the Mantle. The formation of some Scalloped Depressions is believed to be an ongoing process today. MareKromium
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PSP_003231_2095_RED_abrowse-01.jpgRocky Mesas in Nilosyrtis Mensae (EDM - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)110 visiteMareKromium
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PSP_006133_1410_RED_abrowse-PCF-LXTT.jpgComplex "Folded Terrain" in Hellas Planitia (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)110 visitenessun commentoMareKromium
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ESP_020794_1860_RED_abrowse.jpg"!" (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)110 visitenessun commentoMareKromium
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