| Piú viste - Mars Reconnaissance Orbiter (MRO) |
PSP_003538_1885_RED_browse.jpgAres Vallis' Cataract (Natural Colors; credits: Lunar Explorer Italia)58 visiteThis image shows a dry cataract within Ares Vallis. A cataract is a large waterfall where there is a high, steep drop. The presence of this large cataract in Ares Vallis confirms that this channel was carved by water, probably in one or many large catastrophic flooding events.
This feature has many of the same characteristics as the cataracts on Earth associated with the flood that carved the Channelled Scablands in Washington State, including horseshoe-shaped headcuts and longitudinal grooves. These grooves in the lower portion of the image lead up to the cataract, with the water flowing from the south to the north in this image. It then flowed down the cataract into the smaller incised channel.
The horseshoe-shaped headcut here is only part of a larger cataract system, and probably formed during the last stage of flooding. The inner channels are now filled with dunes formed by wind blowing along the channel floor.MareKromium
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ESP_012068_9000_COLOR5.JPGDeimos (Natural - but enhanced - Colors; credits: NASA/JPL/Univ. of Arizona)58 visiteThis second image of Deimos was acquired 5 h. and 35' after the first one; so the Sun was to the upper left in the first (ESP_01265_9000) image and to the right in this second one (ESP_01268_9000). Although the viewing geometry is similar in the two images, surface features appear very different due to the changes in illumination.
Nota Lunexit: il concetto sancito dagli Amici di Pasadena nell'ultima riga (...Although the viewing geometry is similar in the two images, surface features appear very different due to the changes in illumination...) è ASSOLUTAMENTE FONDAMENTALE per la corretta visione, comprensione ed analisi di quanto mostrato da immagini orbitali o, comunque, ottenute da notevoli distanze rispetto al luogo/rilievo osservato. MareKromium
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PSP_010402_1485_RED_abrowse.jpgSample of Intermediate-Toned Area (Natural Colors; credits: Lunar Explorer Italia)58 visiteMars Local Time: 15:42 (middle afternoon)
Coord. (centered): 31,1° South Lat. and 130,7° East Long.
Spacecraft altitude: 255,9 Km (such as about 159,9 miles)
Original image scale range: 51,2 cm/pixel (with 1 x 1 binning) so objects ~1,54 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 7,6°
Phase Angle: 76,9°
Solar Incidence Angle: 71° (meaning that the Sun is about 19° above the Local Horizon)
Solar Longitude: 142,0° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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PSP_010400_2265_RED_abrowse.jpgExtremely Fresh and Small Crater Cluster (Natural Colors; credits: Lunar Explorer Italia)58 visiteMars Local Time: 15:32 (middle afternoon)
Coord. (centered): 46,3° North Lat. and 176,9° East Long.
Spacecraft altitude: 307,4 Km (such as about 199,1 miles)
Original image scale range: 30,8 cm/pixel (with 1 x 1 binning) so objects ~ 92 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 10,2°
Phase Angle: 44,0°
Solar Incidence Angle: 54° (meaning that the Sun is about 36° above the Local Horizon)
Solar Longitude: 141,9° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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Esp_012065_9000_color.jpgDeimos (possible True Colors; credits: Lunar Explorer Italia)58 visitenessun commentoMareKromium
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ESP_011386_2065_RED_abrowse.jpgCollapse Pit in Tractus Fossae (Enhanced and Darkened Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia)58 visiteMars Local Time: 15:46 (middle afternoon)
Coord. (centered): 26,1° North Lat. and 259,4° East Long.
Spacecraft altitude: 281,9 Km (such as about 176,2 miles)
Original image scale range: 28,2 cm/pixel (with 1 x 1 binning) so objects ~ 85 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 6,7°
Phase Angle: 54,4°
Solar Incidence Angle: 61° (meaning that the Sun is about 29° above the Local Horizon)
Solar Longitude: 182,8° (Northern Autumn)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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PSP_010413_1920_RED_abrowse.jpgMigrating Dunefield (Natural Colors; credits: Lunar Explorer Italia)58 visiteMars Local Time: 15:37 (middle afternoon)
Coord. (centered): 11,8° North Lat. and 185,9° East Long.
Spacecraft altitude: 280,9 Km (such as about 175,5 miles)
Original image scale range: 28,1 cm/pixel (with 1 x 1 binning) so objects ~ 84 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 3,4°
Phase Angle: 49,6°
Solar Incidence Angle: 53° (meaning that the Sun is about 37° above the Local Horizon)
Solar Longitude: 142,4° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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PSP_010416_1710_RED_abrowse.jpgTerra Tyrrhena (Natural Colors; credits: Lunar Explorer Italia)58 visiteMars Local Time: 15:43 (middle afternoon)
Coord. (centered): 9,1° South Lat. and 106,9° East Long.
Spacecraft altitude: 263,2 Km (such as about 164,5 miles)
Original image scale range: 52,7 cm/pixel (with 1 x 1 binning) so objects ~ 1,58 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 8,1°
Phase Angle: 53,5°
Solar Incidence Angle: 60° (meaning that the Sun is about 30° above the Local Horizon)
Solar Longitude: 142,5° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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PSP_010402_2050_RED_abrowse.jpgUnnamed Fresh Crater in Utopia Planitia (Natural Colors; credits: Lunar Explorer Italia)58 visiteMars Local Time: 15:35 (middle afternoon)
Coord. (centered): 24,6° North Lat. and 124,5° East Long.
Spacecraft altitude: 287,2 Km (such as about 179,5 miles)
Original image scale range: 28,7 cm/pixel (with 1 x 1 binning) so objects ~ 86 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 3,1°
Phase Angle: 48,0°
Solar Incidence Angle: 51° (meaning that the Sun is about 39° above the Local Horizon)
Solar Longitude: 142,0° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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ESP_011526_0980_RED_abrowse.jpgMonitor Seasonal Changes at a South Polar Cracked and Gullied Site (Natural Colors; credits: Lunar Explorer Italia)58 visiteMars Local Time: 17:10 (middle afternoon)
Coord. (centered): 81,7° South Lat. and 66,3° East Long.
Spacecraft altitude: 246,5 Km (such as about 154,1 miles)
Original image scale range: 49,3 cm/pixel (with 1 x 1 binning) so objects ~ 1,48 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 2,6°
Phase Angle: 82,3°
Solar Incidence Angle: 84° (meaning that the Sun is about 6° above the Local Horizon)
Solar Longitude: 189,1° (Northern Autumn)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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ESP_011496_1100_RED_abrowse.jpgJeans Crater's Dunefield Seasonal Monitoring (Natural Colors; credits: Lunar Explorer Italia)58 visiteMars Local Time: 16:25 (middle afternoon)
Coord. (centered): 69,6° South Lat. and 153,3° East Long.
Spacecraft altitude: 251,1 Km (such as about 156,9 miles)
Original image scale range: 50,2 cm/pixel (with 1 x 1 binning) so objects ~ 1,51 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 9,5°
Phase Angle: 71,0°
Solar Incidence Angle: 79° (meaning that the Sun is about 11° above the Local Horizon)
Solar Longitude: 187,7° (Northern Autumn)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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Mud_Volcano-MRO.jpgMud Volcanoes on Mars? (Natural Colors; credits: Lunar Explorer Italia)58 visiteDa "NASA - Picture of the Day" del giorno 30 Marzo 2009:"Is this a Mud Volcano on Mars? If so, could it be dredging up Martian Microbes? This strange possibility has been suggested recently and seems to fit several recent observations of Mars.
First of all, hills like this seem to better resemble Mud Volcanoes on Earth than Lava Volcanoes and Impact Craters on Mars.
Next, the pictured dome has an unusually textured surface consistent with fractured ice. Infrared images from space indicate that hills like this cool more quickly than surrounding rock, consistent with a dried mud composition.
The hills also reflect colors consistent with a composition that formed in the presence of water.
Finally, unusual plumes of gas containing Methane have been found on Mars with unknown origin. These gas plumes could conceivably have been liberated by Mud Volcanoes, were the initially warm mud to contain Methane-producing microbes drifting in a previously unobservable underground lake.
A candidate mud volcano over 100 meters across is pictured above in the Northern Plains (Vastitas Borealis Region) of Mars".MareKromium
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