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Mars Reconnaissance Orbiter (MRO)
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Psp_009797_1525_red.jpgThe Central Peak of Isil Crater (possible True Colors; credits: Lunar Explorer Italia)63 visiteMars Local Time: 15:37 (middle afternoon)
Coord. (centered): 27,0° South Lat. and 87,9° East Long.
Spacecraft altitude: 254,5 Km (such as about 159,1 miles)
Original image scale range: 50,9 cm/pixel (with 1 x 1 binning) so objects ~1,53 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 1,6°
Phase Angle: 70,8°
Solar Incidence Angle: 72° (meaning that the Sun is about 18° above the Local Horizon)
Solar Longitude: 119,2° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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Psp_009799_2205_red.jpgFeatures of Deuteronilus Mensae (natural colors; credits: Lunexit)70 visiteThis image shows Lineated Valley Fill and Lobate Debris Aprons in the Deuteronilus Mensae Region. Deuteronilus Mensae is located on the northern edge of Arabia Terra and borders the high-standing, heavily-cratered Southern Hemisphere and the low, uncratered plains that cover most of the Northern Hemisphere of Mars.
The Region is characterized by Hills and Mesas surrounded by debris Slopes and broad Valleys.
Many of the valley floors in the Deuteronilus Mensae Region exhibit complex alignments of small Ridges and Pits often called “Lineated Valley Fill”.
The cause of the small-scale texture is not well understood, but may result from patterns in ice-rich soils or ice loss due to sublimation (ice changing into water vapor).
The linear alignment may be caused by downhill movement of ice-rich soil or by glacial flow.
For example, flowing ice on Earth typically develops wrinkles or ridges and pits due to stresses in the ice as it moves.
The result is flow patterns, called “stream lines” that follow the valleys and curve around obstacles. In this image, stream lines are diverted or curve around the Mesas.
The mesas in this image are also surrounded by aprons of debris that appear to have flowed away from the Mesa. Recent results from the SHAllow RADar (SHARAD) instrument, another instrument onboard the Mars Reconnaissance Orbiter, indicate that lobate debris aprons in Deuteronilus Mensae, similar to those visible here, are composed of material dominated by ice [Plaut et al., 2008] and are interpreted to be potential debris-covered glaciers or rock glaciers.
The Debris Aprons in this image appear to lie on top of the Lineated Valley Fill and are therefore probably younger deposits.MareKromium
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Psp_009802_1700_red.jpgGanges Cavus' Walls and Interior (possible True Colors; credits: Lunar Explorer Italia)65 visiteMars Local Time: 15:30 (middle afternoon)
Coord. (centered): 9,9° South Lat. and 308,4° East Long.
Spacecraft altitude: 264,1 Km (such as about 165,1 miles)
Original image scale range: 26,4 cm/pixel (with 1 x 1 binning) so objects ~52,8 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 8,3°
Phase Angle: 67,2°
Solar Incidence Angle: 61° (meaning that the Sun is about 29° above the Local Horizon)
Solar Longitude: 119,4° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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Psp_009820_1510_red.jpgOutcrops in Eridania Basin (possible True Colors; credits: Lunar Explorer Italia)85 visiteMars Local Time: 15:37 (middle afternoon)
Coord. (centered): 28,7° South Lat. and 180,0° East Long.
Spacecraft altitude: 254,2 Km (such as about 158,9 miles)
Original image scale range: 50,9 cm/pixel (with 1 x 1 binning) so objects ~1,53 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 0,3°
Phase Angle: 72,7°
Solar Incidence Angle: 73° (meaning that the Sun is about 17° above the Local Horizon)
Solar Longitude: 120,1° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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Psp_009855_2625_red.jpgUnusually-looking "Mound" in the NPLD (natural colors; credits: Lunexit)65 visiteThe North Polar Layered Deposits (NPLD) are composed of a stack of ice-rich layers that is up to several kilometers thick. Each layer is thought to contain information about the climate that existed when it was deposited, so the stack of layers within the NPLD may represent a record of how climate has varied on Mars in the recent past.
We can see these internal layers exposed in the many troughs and scarps that have been cut by erosion into the stack. One of these troughs, visible in this image, contains a 500 meter (1640 feet) thick section of this layering.
However, the layers are not the only interesting thing being shown here. There is a conical mound part-way down the slope that is approximately 40 m (130 ft) high. One possible explanation for this anomaly is that it may be the remnant of a buried impact crater that is now being exhumed. As the NPLD accumulated, impacts occurred throughout its surface which were then buried by additional ice. These buried craters are generally inaccessible to us, but in a few rare locations, erosion that forms a trough (like this one) can uncover these buried structures. For reasons that are poorly understood right now, the ice beneath the site of the crater is more resistant to this erosion, so when material is removed in forming the trough the ice beneath the old impact site remains, creating this isolated hill.
An inspection of the full-resolution data shows that polygonal blocks, up to 10 mt (33 feet) across, make up this mound. Although covered with reddish dust, the blocks resemble ice-rich blocks seen in other exposures of the NPLD.MareKromium
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Psp_009861_2590_red.jpgNorth Polar Terrain (possibe True Colors; credits: Lunar Explorer Italia)100 visiteMars Local Time: 14:49 (early afternoon)
Coord. (centered): 78,8° North Lat. and 120,4° East Long.
Spacecraft altitude: 321,3 Km (such as about 200,8 miles)
Original image scale range: 64,3 cm/pixel (with 1 x 1 binning) so objects ~1,93 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 6,4°
Phase Angle: 55,4°
Solar Incidence Angle: 61° (meaning that the Sun is about 29° above the Local Horizon)
Solar Longitude: 121,6° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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Psp_009862_2645_red.jpgRound and Black Crater on the North Polar Cap (possible True Colors)94 visiteMars Local Time: 13:50 (early afternoon)
Coord. (centered): 84,4° North Lat. and 77,9° East Long.
Spacecraft altitude: 317,9 Km (such as about 198,7 miles)
Original image scale range: 31,8 cm/pixel (with 1 x 1 binning) so objects ~95 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 3,2°
Phase Angle: 61,2°
Solar Incidence Angle: 64° (meaning that the Sun is about 26° above the Local Horizon)
Solar Longitude: 121,6° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer Italia
Nota Lunexit: la somiglianza fra questo modesto cratere d'impatto (NASA dixit) ed i "Pit Craters" (o crateri a pozzo, correlati a fenomeni di subsidenza e NON a fenomeni meteorici) è, a dir poco, straordinaria! L'incredibile rotondità del rilievo, inoltre, ci lascia supporre che, se si trattasse effettivamente di un "impact crater", allora il bolide che lo ha creato dovrebbe essere precipitato - letteralmente - "a piombo" sulla superficie di Marte (ossìa con un angolo di impatto pari a circa 90°: un evento più unico che raro!...).
Molto bello e marcato il Windstreak che si diparte dal cratere e che ci lascia supporre l'esistenza di un piccolo margine (rim), non visibile nè percepibile a questa risoluzione.MareKromium
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Psp_010141_1540_red.jpgPitted Plain, North of Hellas Region (possible True Colors; credits: Lunar Explorer Italia)77 visiteMars Local Time: 15:38 (middle afternoon)
Coord. (centered): 25,5° South Lat. and 55,6° East Long.
Spacecraft altitude: 258,8 Km (such as about 161,7 miles)
Original image scale range: 51,8 cm/pixel (with 1 x 1 binning) so objects ~1,55 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 6,7°
Phase Angle: 74,2°
Solar Incidence Angle: 69° (meaning that the Sun is about 21° above the Local Horizon)
Solar Longitude: 132,0° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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Psp_010209_1855_red.jpgWhere the Waters flew... (possible True Colors; credits: Lunar Explorer Italia)77 visiteMars Local Time: 15:34 (middle afternoon)
Coord. (centered): 5,6° North Lat. and 355,5° East Long.
Spacecraft altitude: 274,8 Km (such as about 171,8 miles)
Original image scale range: 27,5 cm/pixel (with 1 x 1 binning) so objects ~55 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 2,6°
Phase Angle: 56,1°
Solar Incidence Angle: 54° (meaning that the Sun is about 36° above the Local Horizon)
Solar Longitude: 134,5° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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Psp_010259_1525_red.jpgBedrock inside Terby Crater (possible True Colors; credits: Lunar Explorer Italia)54 visiteMars Local Time: 15:40 (middle afternoon)
Coord. (centered): 27,3° South Lat. and 74,3° East Long.
Spacecraft altitude: 260,9 Km (such as about 163,1 miles)
Original image scale range: 52,2 cm/pixel (with 1 x 1 binning) so objects ~1,57 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 6,4°
Phase Angle: 74,2°
Solar Incidence Angle: 69° (meaning that the Sun is about 21° above the Local Horizon)
Solar Longitude: 136,4° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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Psp_010344_2655_red.jpgScarp-Fed Dark Dunes (possible True Colors; credits: Lunar Explorer Italia)54 visiteMars Local Time: 09:59 (middle morning hours)
Coord. (centered): 85,7° South Lat. and 179,4° East Long.
Spacecraft altitude: 330,6 Km (such as about 206,6 miles)
Original image scale range: 66,1 cm/pixel (with 1 x 1 binning) so objects ~1,98 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 17,4°
Phase Angle: 84,6°
Solar Incidence Angle: 70° (meaning that the Sun is about 20° above the Local Horizon)
Solar Longitude: 139,7° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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Psp_010345_2150_red.jpgPits in Cyane Fossae (Saturated Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia)54 visiteMars Local Time: 15:30 (middle afternoon)
Coord. (centered): 34,4° North Lat. and 239,0° East Long.
Spacecraft altitude: 285,7 Km (such as about 178,6 miles)
Original image scale range: 57,2 cm/pixel (with 1 x 1 binning) so objects ~1,72 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 0,3°
Phase Angle: 50,5°
Solar Incidence Angle: 50° (meaning that the Sun is about 40° above the Local Horizon)
Solar Longitude: 139,8° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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