| Risultati della ricerca nelle immagini - "Columbus" |
ESP_018496_1510_RED_abrowse.jpgColumbus Crater (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)83 visitenessun commentoMareKromium
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Landslides-Terra_Sirenum_Region-PIA14561-PCF-LXTT.jpgLandslides on the Southern Side of Columbus Crater - Terra Sirenum (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)121 visiteOrbit Number: 42637
Latitude: 30,426° South
Longitude: 193,484° East
Instrument: VIS
Captured: July, 25th, 2011
MareKromium
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PSP_004018_1505_RED_abrowse.jpgLayers in Columbus Crater (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)84 visiteThis HiRISE image shows bright Layers on the Floor of Columbus Crater, a large Impact Basin in the Southern Highlands of Mars.
The Crater is very old and has gone through much modification. Its Rim is relatively low and the Floor is flat, and it is likely that material has been eroded from the Rim and deposited on the Crater Floor.
The bright stripes that appear in this image at low resolution are likely Sedimentary Deposits. This bright material also includes dark patches which may be embedded within it, or the dark material could be covering the light one. The small-scale topography is rugged, likely an erosional characteristic of the dark material which covers much of the Surface.
Bright materials like those visible here are found in many places on Mars. In this case, it is likely that they are part of the Sediments that have filled the Basin, but it is not certain how they were deposited.
In many places, bright Sediments exhibit fine horizontal banding, suggesting that they were once part of more extensive, flat-lying Layers of rock. In the bright materials here, Layering is rare and the original geometry somewhat more obscure. Impact Craters in the scene have excavated the Dark Surface, but in several cases this has neither exposed layering nor bright material.MareKromium
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PSP_010281_1510_RED_abrowse-00.jpgSedimentary Layers in Columbus Crater (ctx frame - possible True Colors; credits: Lunar Explorer Italia)56 visiteThis image covers a portion of the North-Eastern Inner Wall of Columbus Crater, located in the Southern Hemisphere of Mars and is approx. 100 Km (about 60 miles) in diameter.
Layered sedimentary rocks are found on the Crater Walls and Floor, and may have been deposited by water or by wind. These rocks have subsequently been eroded to expose their successive layers in cross-section.
The near-infrared spectrometer CRISM has revealed that these layers contain various hydrated minerals.
Mars Local Time: 15:42 (middle afternoon)
Coord. (centered): 28,6° South Lat. and 194,3° East Long.
Spacecraft altitude: 256,0 Km (such as about 160,0 miles)
Original image scale range: 25,6 cm/pixel (with 1 x 1 binning) so objects ~77 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 0,5°
Phase Angle: 70,9°
Solar Incidence Angle: 70° (meaning that the Sun is about 20° above the Local Horizon)
Solar Longitude: 137,3° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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PSP_010281_1510_RED_abrowse-01.jpgSedimentary Layers in Columbus Crater (edm - possible True Colors; credits: Lunar Explorer Italia)56 visiteVisible in this edm is a north-facing slope (roughly 250 meters, or 800 feet, across) exposing finely layered sedimentary rock.
In this possibly true-color view, layers with a dark silver-gray appearance may be intrinsically darker, or may have a texture that more effectively collects dark sand particles, than adjacent layers with a brighter appearance.MareKromium
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