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PIA11809.jpgColumnar Jointing (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia)57 visiteThis image from the High Resolution Imaging Science Experiment (HiRISE) on NASA's Mars Reconnaissance Orbiter shows an exposure of layered rock that exhibits a type of fracturing - called Columnar Jointing - that results when cooling lava contracts.
The observation is cited in a report, "Discovery of Columnar Jointing on Mars", publisged in the February 2009 issue of the journal Geology. The Authors propose that flooding by water was likely what caused a quick cooling of lava to result in this jointing.
The image, taken Oct. 31, 2007, shows a portion of an Unnamed Crater about 16 Km (such as approx. 10 miles) in diameter and centered at 21,52° North Latitude and 184,35° East Long.
Shown here is a section about 1 Km (0,6 mile) wide from the image catalogued by the HiRISE team as PSP_005917_2020. The column-forming fractures resemble textures common on Earth in locations such as the Colombia River Basalt Group and in the Colorado Plateau.MareKromium
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Titan-Map-Wind_Patterns-PIA11801.jpgMapping Titan's Global Wind Patterns57 visiteScientists have used data from the Cassini Radar Mapper to map the Global Wind Pattern on Saturn's moon Titan using data collected over a four-year period, as depicted in this image.
The arrows indicate the direction in which sand is inferred to be transported along dunes observed in Titan radar data.
Underlying the arrows is a base map (PIA08399) from Cassini's Imaging Science Subsystem.
Many of the equatorial dark areas without arrows might have dunes but have not yet been imaged with radar. The dune orientations represent only the net effect of winds. It could be that sand transport only occurs on rare occasions, and winds from different directions can combine to yield the observed dune orientations.MareKromium
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APOLLO_17_-_AS_17-140-21502.jpgAS 17-140-21502 - Lens Flares (special processing and coloring by Lunar Explorer Italia)57 visiteStation 6 Panorama; Solar Incidence Angle: 54° (meaning that the Sun is 36° above the Local Horizon)MareKromium
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ESP_011765_1780_RED_abrowse-01.jpgRipples in Meridiani Planum (edm - Natural Colors; credits: Lunar Explorer Italia)57 visitenessun commentoMareKromium
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ESP_011765_1780_RED_abrowse-00.jpgRipples in Meridiani Planum (ctx frame - Natural Colors; credits: Lunar Explorer Italia)57 visiteMars Local Time: 15:46 (middle afternoon)
Coord. (centered): 2,1° South Lat. and 354,5° East Long.
Spacecraft altitude: 276,0 Km (such as about 172,5 miles)
Original image scale range: 27,6 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: 12,5°
Phase Angle: 69,0°
Solar Incidence Angle: 57° (meaning that the Sun is about 33° above the Local Horizon)
Solar Longitude: 200,0° (Northern Autumn)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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SOL1139-2P227476783ESFASZWP2575R1M1-2.jpgExtremely Unusual Surface Feature (edm - credits: Dr G. Barca)57 visite...incommentabile...MareKromium
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Candor_Chasma-20090305a.jpgCandor Chasma (Natural Colors; credits: Lunar Explorer Italia)57 visiteCaption NASA:"This VIS image shows a small portion of the floor of Candor Chasma, just East of the North-South trending Baetis Mensa".
Coord.: 5,6° South Lat. and 287,8° East Long.MareKromium
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SOL1839-2N289628603EFFB0BUP0775L0M1.jpgHorizon... - Sol 1839 (Natural Colors - High Atmospheric Opacity; credits: Lunar Explorer Italia)57 visitenessun commentoMareKromium
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SOL662-GB-LXT.jpgLonely Boulder - Sol 662 (Natural Colors; credits: Dr G. Barca & Lunar Explorer Italia)57 visitenessun commentoMareKromium
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302-2N165885216EFFA9B0P1701R0M1-3D.jpgRocks... (High-Def-3D; credits: Dr M. Faccin)57 visitenessun commentoMareKromium
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PSP_010400_2265_RED_abrowse.jpgExtremely Fresh and Small Crater Cluster (Natural Colors; credits: Lunar Explorer Italia)57 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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SOL565-GB-LXT-2.jpgThe "Red" American Flag - Sol 565 (possible True Colors; credits: Dr G. Barca)57 visitenessun commentoMareKromium
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