| Risultati della ricerca nelle immagini - "Utopia" |
Channel-Utopia_Planitia-UP-PCF-LXTT.jpgChannel and Tributaries - Utopia Planitia (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)119 visitenessun commentoMareKromium
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Craters-Unnamed_Crater-Utopia_Planitia-PCF-LXTT-1.jpgUnnamed Crater with Gullies and Small Dunefield in Utopia Planitia (Saturated Natural Colors; credits for the additional process. and color.: Dr Paolo C . Fienga - Lunar Explorer Italia)54 visitenessun commentoMareKromium
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Craters-Unnamed_Crater_in_Utopia_Planitia-PIA13406.jpgUnnamed Crater in Utopia Planitia (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)119 visitenessun commentoMareKromium
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Craters-Unnamed_Crater_in_Utopia_Planitia.JPGFeatures of Utopia Planitia (Original NASA/MGS/MSSS b/w Frame)62 visiteCaption originale:"This MGS-MOC image shows a dark-toned, cratered Plain in South/West Utopia Planitia. Large, light-toned, windblown Ripples reside on the Floors of many of the depressions in the scene, including a long, linear, Trough".
Location near: 30,3° North Lat. and 255,3° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
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Craters-Unnamed_Crater_with_Dunefield-PCF-LXTT.jpgUnnamed Crater with small Dunefield in Utopia Planitia (Enhanced and Saturated Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)53 visitenessun commentoMareKromium
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Craters-Unnamed_Crater_with_Dunefield-UP-20090204a-PCF-LXTT.jpgUnnamed Crater with Dunefield in Utopia Planitia (Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C . Fienga - Lunar Explorer Italia)53 visiteCaption NASA:"The floor of this Unnamed Crater in Utopia Planitia has the typical pattern of Northern Craters: a pattern that suggests volatiles are part of the material filling the Crater.
In this crater, sand dunes are also located on the Crater Floor".MareKromium
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ESP_011287_2165_RED_abrowse.jpgFresh Impact Crater in Utopia Planitia (Natural Colors; credits: Lunar Explorer Italia)56 visiteThis fresh Unnamed Crater is located in the Northern Mid-Latitudes. It is designated as fresh because of its very sharp rim.
The Crater has experienced some modification since it formed, including a few tiny craters on the South Wall.
The rough texture of the floor is suggestive of ground ice, which is expected to exist in the Mid-Latitudes. Ground ice aids gravity in moving material from the Crater Walls towards the center. Material is visible slumping off the North-Western Crater Wall in this fashion. The wavy texture of the center of the Crater floor suggests that material has been transported from the walls and merged in the center.
Mars Local Time: 15:42 (middle afternoon)
Coord. (centered): 36,0° North Lat. and 80,5° East Long.
Spacecraft altitude: 292,7 Km (such as about 182,9 miles)
Original image scale range: 58,6 cm/pixel (with 1 x 1 binning) so objects ~1,76 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 2,9°
Phase Angle: 59,7°
Solar Incidence Angle: 62° (meaning that the Sun is about 28° above the Local Horizon)
Solar Longitude: 178,5° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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ESP_017900_2185_RED_abrowse.jpgUnnamed Impact Crater cut by Faults (Natural Colors; credits: Dr Paolo C. Fienga - Lunexit Team)54 visiteThis image reveals an interesting coincidence of two important Planetary Processes: Cratering by Impacts and Tectonism.
Here we have an Impact Crater (the large round feature, approx. 6,2 Km, or 3,9 miles, across) that intersects a series of Faults (the linear features). The Faults are seen to cut the circular Rim of the Impact Crater. Also, the impact did not destroy the adjacent faults. These observations tell us that the Fault was active after the impact occurred.
In addition, by measuring the distance of offset of the different pieces of the Crater Rim separated by the Fault Line (assuming that when the Crater formed, the Rim was continuous around its circumference), the amount of movement along the Fault can be estimated, laterally and vertically. Faults like these cause Troughs to form, called "Graben", of which the heavily shadowed one is a good example. The center (shadowed) section has been dropped downwards relative to the surrounding Terrain, forming the Trough.
It is also clear that parts of the Crater Rim are lower than others where the Graben intersects the Crater. The sides of the Graben (the Faults forming the Walls of the Trough) are sloped, so that the dropped-down part of the Crater Rim has also moved horizontally away from its higher part. The combined down-dropping and moving apart indicates that the land here is being stretched and pulled apart, called "extension". By measuring the amount of offset on all the Faults, we can estimate how much extension has occurred in this part of the Planet.
This location is especially helpful because, as mentioned above, we have a good knowledge of the “before-faulting” configuration of the land, in which the Crater Rim was continuous. Finally, it is interesting that there is no sign of the Fault on the Floor of the Crater – its Floor has not been faulted and no part is down-dropped and stretched apart as the Rim has been. This indicates that some infilling of the Crater (perhaps by Lava or Airborne Sediment) has likely occurred since the Fault was active, burying the trace of the Fault and representing a third stage of geologic history in this area.MareKromium
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ESP_022178_1960_RED_abrowse-Utopia_Planitia-PCF-LXTT-1.jpgPossible MSL Landing Site in Utopia Planitia (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)187 visitenessun commentoMareKromium
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PSP_001410_2210_RED_abrowse.jpgUnnamed Craters with Layered Deposits in Utopia Planitia (Natural Colors; credits: Lunexit)54 visiteThis image shows an Unnamed Impact Crater located in Utopia Planitia (Northern Hemisphere of Mars) that is filled with layered material.
The layered character of these Deposits is consistent with episodic deposition. Each distinct layer represents a period of sediment deposition. The layers are parallel to each other, indicating that deposition occurred by material settling onto the Surface, rather than being blown across the Surface in Sand Dunes.
The hummocky texture of these deposits suggests that volatiles (such as Carbon Dioxide Ice) are mixed in with the rocky sediment.MareKromium
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PSP_001910_2215_RED_abrowse-00.jpgUnnamed Crater in Utopia Planitia (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)54 visiteThis observation shows an Unnamed Impact Crater located in Utopia Planitia; this Crater is more than 10 Km (6,25 miles) in diameter and approx. 700 meters (765 yards) deep. Different features in and around this Crater may indicate the presence of fluid beneath the Surface.
Linear features radiating outward from the Crater's Rim are evident. Closer examination shows these features are formed by rocks and finer soils that are located along a straight line; technically, they are "Spokes" produced immediately after the impact by very fast outward-moving materials ejected from the contact-zone. Because these Ejecta came from deep under the Crater, their composition will tell us what type of rocks are under the Surface.
A MOC context image of this Crater shows its Ejecta Materials form an elevated "Pedestal," shaped like a pancake. The Pedestal is approx. 20 Km (about 12,5 miles) in diameter. "Pedestal craters" such as this may have formed because ice beneath the Surface melted when the impact occurred.MareKromium
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PSP_002070_2250_RED_abrowse-00.jpgPolygons in Utopia Planitia (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team) 86 visiteThis observation, in the Utopia Planitia, is marked by Depressions in the Mantle, several of which have coalesced together and now possess Scalloped edges and Layers.
Scalloped pits, such as these, are typical features of the Mid-Latitude Mantle and are most commonly found at approx. 55° both North and South Latitude; in the Utopia Planitia, Scalloped Terrain is found between 45-50° North latitude where the Mantle is highly discontinuous. The presence of Scalloped Pits has led to hypotheses of the removal of Sub-Surface material, possibly interstitial ice, by Sublimation. Scalloped Depressions in the Utopia Planitia have also been interpreted to be "Thermokarst Lakes" created by melting of Permafrost (frozen ground) and collapse of the dry Surface Layer.
Scalloped Pits typically have a steep Pole-facing Scarp and a gentler Equator-facing Slope. This is most likely due to differences in solar heating.MareKromium
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