| Ultimi arrivi - Mars Reconnaissance Orbiter (MRO) |
ESP_020797_1280_RED_abrowse-00.jpgPossible Active Gullies' Activity on a Southern Dunefield59 visiteCaption NASA:"The Dark Sand Dunes here are eroded in many places, forming Gullies. Some of these Gullies were not present in prior images of this spot or, if they were, they have now grown in size.
Monitoring of Dune Gullies by HiRISE has shown us when the Gullies are active: in the Winter or early Spring.
This was a surprise, because the Gullies look like ones on Earth that are formed by flowing water or wet debris. It is far too cold for water to be liquid in the Martian Winter, but there is Carbon Dioxide Frost (Dry Ice) on the ground, lasting through the Spring at high latitudes. This Frost may serve to reduce grain-to-grain friction, allowing the sand to flow on the steep slopes".MareKromiumFeb 15, 2011
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Proctor_Crater_Dunes-Psp_001558_1325_red-PCF-LXTT.jpgThe Frozen "Pseudo-Dunes" of Proctor Crater (Enhanced Natural Colors; credits: Dr Paolo C. Fienga - Lunexit Team)101 visitenessun commentoMareKromiumFeb 14, 2011
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PSP_002324_1815_red-PCF-LXTT.jpgNorthern Meridiani Planum (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)92 visitenessun commentoMareKromiumFeb 13, 2011
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PSP_010882_2040_RED_abrowse-PCF-LXTT.jpgFeatures of Mawrth Vallis (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)108 visitenessun commentoMareKromiumFeb 11, 2011
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PSP_010877_1610_RED_abrowse-PCF-LXTT.jpgCentral Uplift (Absolute Natural Colors; additional process.: Dr Paolo C. Fienga - Lunexit Team)94 visitenessun commentoMareKromiumFeb 11, 2011
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PSP_010862_1880_RED_abrowse-00-PCF-LXTT.jpgRecent Impact in Amazonis Planitia (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)95 visitenessun commentoMareKromiumFeb 11, 2011
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ESP_020842_2030_RED_abrowse-00-PCF-LXTT.jpgFresh Primary Crater on a Secondary Craters' Cluster (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team:)85 visitenessun commentoMareKromiumFeb 10, 2011
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ESP_020958_1680_RED_abrowse-PCF-LXTT.jpgMassif in Coprates Chasma (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)90 visitenessun commentoMareKromiumFeb 10, 2011
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ESP_020683_2010_RED_abrowse-PCF-LXTT.jpgTharsis Plateau (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)90 visitenessun commentoMareKromiumFeb 10, 2011
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ESP_020956_1115_RED_abrowse.jpgFrosted presso-polar "Pit Gullies" (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)80 visitenessun commentoMareKromiumFeb 09, 2011
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ESP_020799_1385_RED_abrowse.jpgFeatures of Argyre Basin (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)71 visitenessun commentoMareKromiumFeb 09, 2011
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ESP_019559_1390_RED_abrowse-PCF-LXTT.jpgThe Dunes of Arkhangelsky Crater (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)79 visitenessun commentoMareKromiumFeb 09, 2011
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