Mars Reconnaissance Orbiter (MRO)
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ESP_019669_2450_RED_abrowse.jpgMega-Polygons in Vastitas Borealis (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)76 visitenessun commentoMareKromium
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ESP_019711_2455_RED_abrowse.jpgUnnamed Crater in Vastitas Borealis (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)92 visiteThis image covers part of a large Impact Crater located in the Northern Plains of Mars (Vastitas Borealis Region). The Crater is old and has been heavily modified by ground ice processes. The most prominent of these processes is the network of Polygonal Fractures visible throughout the image.
These landforms are created when temperature changes over the course of a year cause ice in the ground to first expand, then contract and, in the end, break. The ground moves fractionally every time this occurs.
At the center of the frame it can be seen that this - repetitive - process has caused the shifting of rocks and boulders through the Surface of the Crater, thus causing them to line up along the Fractures and then form some interesting geometric patterns.MareKromium
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ESP_019727_1930_RED_abrowse-00-PCF-LXTT.jpgUnnamed "Concentric" Craters (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)177 visitenessun commentoMareKromium
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ESP_019727_1930_RED_abrowse-01-PCF-LXTT.jpgSigns of possible "Mass Wasting" (EDM - Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)183 visitenessun commentoMareKromium
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ESP_019732_1750-PCF-LXTT-00.jpgFeatures of Candor Chasma (CTX Frame "A" - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)192 visiteMars Local Time: 15:33 (middle afternoon)
Coord. (centered): 5,2° South Lat. and 286,1° East Long.
Spacecraft altitude: 275,3 Km (such as about 172,1 miles)
Original image scale range: 27,5 cm/pixel (with 1 x 1 binning) so objects ~ 83 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 15,8°
Phase Angle: 69,6°
Solar Incidence Angle: 55° (meaning that the Sun is about 35° above the Local Horizon)
Solar Longitude: 162,6° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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ESP_019732_1750-PCF-LXTT-01.jpgFeatures of Candor Chasma (CTX Frame "B" - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)189 visiteMars Local Time: 15:33 (middle afternoon)
Coord. (centered): 5,2° South Lat. and 286,1° East Long.
Spacecraft altitude: 275,3 Km (such as about 172,1 miles)
Original image scale range: 27,5 cm/pixel (with 1 x 1 binning) so objects ~ 83 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 15,8°
Phase Angle: 69,6°
Solar Incidence Angle: 55° (meaning that the Sun is about 35° above the Local Horizon)
Solar Longitude: 162,6° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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ESP_019747_1975_RED_abrowse.jpgGraben cutting Lava-Flow (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)70 visitenessun commentoMareKromium
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ESP_019987_1095_RED_abrowse.jpgHigh Southern Latitude "Dunes' Gullies" (Absolute Natural Colors; credits for the additional process. and color.: Elisabetta Bonora and Paolo C. Fienga - Lunexit Team)113 visitenessun commentoMareKromium
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ESP_019991_2440_RED_abrowse.jpgPossible Ice-Exposure in Vastitas Borealis (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team) 77 visitenessun commentoMareKromium
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ESP_019992_1340_RED_abrowse.jpgSouthern Dunefield (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)69 visitenessun commentoMareKromium
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ESP_020058_1300_RED_abrowse-01-PCF-LXTT.jpgDune-Gullies in Matara Crater (EDM - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)81 visiteCaption NASA:"This image shows changing Dunes and incised Gullies (so-called "Dune-Gullies") in the Southern Matara Crater.
Repeat imaging of the Dunes in this Crater shows that material towards the top of the Gullies has moved downslope and the Channel Beds may have widened over time.
Since this activity occurs during Martian Southern Hemisphere Winter, it is believed to be related to Carbon Dioxide (CO2) Frost that forms as the area grows colder. Scientists continue to monitor this specific Region for changes in the Gullies and the Dunes themselves. This frame is approx. 1 (one) Km (0,6 miles) across".MareKromium
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ESP_020058_1300_RED_abrowse-02.jpgDune-Gullies in Matara Crater (EDM - Approx. True Colors; credits for the additional process. and color.: NASA/JPL/University of Arizona)54 visiteCaption NASA:"This image shows changing Dunes and incised Gullies (so-called "Dune-Gullies") in the Southern Matara Crater.
Repeat imaging of the Dunes in this Crater shows that material towards the top of the Gullies has moved downslope and the Channel Beds may have widened over time.
Since this activity occurs during Martian Southern Hemisphere Winter, it is believed to be related to Carbon Dioxide (CO2) Frost that forms as the area grows colder. Scientists continue to monitor this specific Region for changes in the Gullies and the Dunes themselves. This frame is approx. 1 (one) Km (0,6 miles) across".MareKromium
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