| Piú votate - Mars Reconnaissance Orbiter (MRO) |
Gullies-Hellas_Planitia-PIA13802.jpgGullies in Hellas Planitia (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit) 219 visiteImages like this from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter show portions of the Martian surface in unprecedented detail. This one shows many channels from 1 meter to 10 meters (approximately 3 feet to 33 feet) wide on a scarp in the Hellas impact basin. On Earth we would call these Gullies. Some larger channels on Mars that are sometimes called Gullies are big enough to be called ravines on Earth.
This view is an excerpt from a HiRISE observation taken on Jan. 14, 2011, nearly five years after the March 10, 2006, arrival of the Mars Reconnaissance Orbiter at Mars. North is up. The image was taken at 15:44 Local Mars Time. The observation is centered at 48,4° South Latitude, 73,5° East Longitude.MareKromium
(5 voti)
|
|
ESP_020801_1825_RED_abrowse.jpgPeri-Equatorial Volcanic Vent (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)403 visitenessun commentoMareKromium
(5 voti)
|
|
ESP_020797_1280_RED_abrowse-00.jpgPossible Active Gullies' Activity on a Southern Dunefield57 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".MareKromium
(5 voti)
|
|
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)89 visitenessun commentoMareKromium
(5 voti)
|
|
PSP_006978_1190_RED_abrowse.jpgSouthern DD Tracks (Absolute Natural Colors; credits: Dr Paolo C. Fienga - Lunexit Team)68 visitenessun commentoMareKromium
(5 voti)
|
|
PSP_006982_1745_RED_abrowse-PCF-LXTT.jpgPortion of the "Interior" of Tithonium Chasma (Absolute Natural Colors; credits for the additional process. and color.: Drr Gianluigi Barca and Paolo C. Fienga - Lunexit Team)64 visitenessun commentoMareKromium
(5 voti)
|
|
Collapse_features-Pits-East_Tharsis-PCF-LXTT.jpgCollapse Pits, East of Tharsis Region (Absolute Natural Colors; additional process.: Dr Paolo C. Fienga - Lunexit Team)84 visitenessun commentoMareKromium
(5 voti)
|
|
Craters-Rabe_Crater-PIA13728-PCF-LXTT-1.jpgInside Rabe Crater - Summertime (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)92 visitenessun commentoMareKromium
(5 voti)
|
|
Craters-Rabe_Crater-PIA13728-PCF-LXTT-2.jpgInside Rabe Crater - Springtime (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)86 visitenessun commentoMareKromium
(5 voti)
|
|
Craters-Rabe_Crater-PIA13728-PCF-LXTT-3.jpgInside Rabe Crater - Wintertime (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)86 visitenessun commentoMareKromium
(5 voti)
|
|
ESP_020395_1260_RED_abrowse.jpgFeatures of Liu Hsin Crater (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)127 visitenessun commentoMareKromium
(5 voti)
|
|
Dunes_and_DD_Tracks-PIA13538-EB-LXTT-001.jpgSouthern Dunes and DD Tracks (Possible True Colors; credits for the additional process. and color.: Elisabetta Bonora - Lunexit Team)84 visitenessun commentoMareKromium
(5 voti)
|
|
| 2235 immagini su 187 pagina(e) |
 |
|
|
|
|
25 | |
|
|
|
|
