| Piú viste - Mars Reconnaissance Orbiter (MRO) |
PSP_008130_1745_RED_abrowse-01.jpgSmall but deep Collapse Pit, North of Arsia Mons (extra-detail mgnf n. 1; credits: Dr G. Barca)73 visitenessun commentoMareKromium
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PSP_008075_1590_RED_abrowse.jpgLight-toned Rocks (MULTISPECTRUM; credits: Lunexit)73 visiteThis observation shows a portion of an approximately 30 kilometer diameter impact crater located to the south of Valles Marineris.
The image reveals that the central uplift inside the crater is a mixture of dark-toned and light-toned materials. It’s likely that some of the rocks in the center of the crater represent units at depth that we wouldn’t otherwise see along the plains that surround the crater. The light-toned units in particular are not visible in the plains surrounding this crater so they could be material that is buried beneath the plains and only visible inside craters or other vertical exposures, such as those created by faults.
Some of the light-toned material appears angular and blocky, consistent with material that has been disrupted and uplifted by an explosion associated with the crater’s formation. The reason why some material appears light-toned is unknown but could be due to a different composition than the darker-toned unit.
Many light-toned units seen elsewhere on Mars, including within Valles Marineris, are made of sulfates so there may be sulfate-rich rocks buried beneath the plains at this location and the formation of the crater exposed them. In any case, the distinct materials visible within impact craters suggest that the crust on Mars may contain many units of variable composition.MareKromium
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PIA10145-CrypticTerrain~0.jpgCryptic Terrain (MULTISPECTRUM; credits: Lunexit)73 visiteThere is an enigmatic Region near the South Pole of Mars known as the "cryptic" terrain. It stays cold in the Spring, even as its albedo darkens and the Sun rises in the sky.
This Region is covered by a layer of translucent seasonal CO2 ice that warms and evaporates from below. As CO2 gas escapes from below the slab of seasonal ice it scours dust from the surface. The gas vents to the surface, where the dust is carried downwind by the prevailing wind.
The channels carved by the escaping gas are often radially organized and are known informally as "spiders". MareKromium
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PSP_009233_2535_RED_abrowse-00.jpgEvolution of North Polar Dunes (ctx frame - natural colors; credits: Lunexit)73 visiteThis small unnamed crater is adjacent to the North Polar Erg and contains a fascinating Dunefield. Scientists are interested in the source of the dunes in the crater and the evolution of the Dunefield’s circular shape.
Wind transports material and shapes the dunes; the dominant wind comes from a Westerly-SouthWesterly direction and forms barchans (crescent-shaped) and barchanoid dunes. Secondary winds also play a role in shaping the dunes.
This can be seen in the Southern part of the Dunefield where the barchans transition into transverse dunes. On the northern edge of the dune field are opposite facing barchans formed by winds from the North-East.MareKromium
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PSP_008214_2285_red.jpgPeriglacial Landscape in Northern Utopia Planitia (Saturated Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)73 visitenessun commentoMareKromium
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PSP_009309_2725_RED.jpgHigh-Latitude Exposure of North Polar Layered Deposits (possible True Colors; credits: Lunar Explorer Italia)73 visiteMars Local Time: 19:52 (evening)
Coord. (centered): 87,5° North Lat. and 327,2° East Long.
Spacecraft altitude: 317,6 Km (such as about 198,5 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: 5,2°
Phase Angle: 60,3°
Solar Incidence Angle: 64° (meaning that the Sun is about 26° above the Local Horizon)
Solar Longitude: 101,9° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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ESP_011290_1800_RED_abrowse.jpgFresh Crater Chain in Meridiani Planum (Natural Colors; credits: Lunar Explorer Italia)73 visiteMars Local Time: 15:47 (middle afternoon)
Coord. (centered): 0,0° Lat. and 2,6° East Long.
Spacecraft altitude: 271,1 Km (such as about 169,4 miles)
Original image scale range: 27,1 cm/pixel (with 1 x 1 binning) so objects ~ 81 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 7,3°
Phase Angle: 64,0°
Solar Incidence Angle: 57° (meaning that the Sun is about 33° above the Local Horizon)
Solar Longitude: 178,6° (Northern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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PSP_010439_1400_RED_abrowse.jpgUnnamed Southern Crater (Natural Colors; credits: Lunar Explorer Italia)73 visitenessun commentoMareKromium
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ESP_014380_1775_RED_abrowse-02.jpgExtremely Unusually-looking Skylight (SuperEDM n.2 - credits: Dr G. Barca)73 visitenessun commentoMareKromium
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PSP_001390_1735_RED_abrowse.jpgCandor Chasma (Natural Colors; credits: Lunexit)73 visitenessun commentoMareKromium
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ESP_16978_1730-MF-LXTT2.jpgFalling Down... (High-Def-3D; credits: Dr Marco Faccin - Lunexit Team)73 visiteAcquisition date: 11 March 2010
Local Mars Time (m.l.t.): 15:07 (early afternoon)
Latitude (centered): 6,8° South
Longitude: 236,6° East
Range to target site: 255,4 km (159,6 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 and North is up
Map projection: EQUIRECTANGULAR
Emission Angle: 1,5°
Phase Angle: 53,2 °
Solar Incidence Angle (S.I.A.): 54° - meaning that the Sun is about 36° above the Local Horizon
Solar Longitude: 62,5° (Northern Spring)MareKromium
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PSP_002179_1855_RED_browse.jpgProposed MSL Landing Site in Meridiani Planum (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)73 visitenessun commentoMareKromium
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