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Titan_and_Janus-MF-LXTT.jpgDo dimensions count? (an Image-Mosaic in Natural Colors by Dr Marco Faccin - Lunexit Team)55 visitenessun commentoMareKromium
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OPP-SOL1352-MF-LXTT2.jpgLooking Around - Sol 1352 (An Image-Mosaic in Natural Colors by Dr Marco Faccin - Lunexit Team)55 visitenessun commentoMareKromium
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Enceladus-EB-LXTT.jpgFountains of Light (High-Def-3D; credits: Elisabetta Bonora - Lunexit Team)55 visitenessun commentoMareKromium
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ESP_016276_2575_RED_abrowse.jpgTranslucent Ice-Patches in the Northern Plains (possible Natural Colors; credits: Dr Paolo C. Fienga - Lunexit Team)55 visitenessun commentoMareKromium
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OPP-SOL2179-PIA12980.jpgThe Rim of Bopulu Crater - Sol 2179 (Approximate True Colors; credits: NASA/JPL-Caltech/Cornell Univ. - Addit. color process.: Dr Paolo C. Fienga - Lunexit Team)55 visiteCaption NASA:"NASA's Mars Exploration Rover used its PanCam to record this view of the Rim of a crater about 65 Km (approx. 40 miles) in the distance, on the South-Western horizon. This Crater, Bopolu, is about 19 Km (approx. 12 miles) in diameter.
The image was taken during the 2179th Martian Day, or Sol, of Opportunity's Mission on Mars (March 11, 2010), two days after the Rover drove Southward away from Concepcion Crater, site of several weeks of investigation.
Opportunity's long-term destination is Endeavour Crater, to the South-East and closer than Bopolu. The intended route heads South before turning East, in order to bypass potentially hazardous Sand Ripples, larger than the ones visible in the foreground of this image.
This Approx. True-Color view combines three exposures taken through filters admitting wavelengths of 750 nanometers, 530 nanometers and 480 nanometers".MareKromium
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OPP-SOL2147-PIA12972.jpgCoating on a Rock standing beside Concepción Crater - Sol 2150 (Natural Colors; credits: Dr Paolo C. Fienga - Lunexit Team) 55 visiteCaption NASA:"This image from the PanCam on NASA's Mars Exploration Rover Opportunity shows a rock called "Chocolate Hills", which the Rover found and examined at the edge of a young crater called "Concepción".
The rover used the tools on its Robotic Arm (RA) to examine the texture and composition of target areas on the rock with and without the dark coating. The rock is about the size of a loaf of bread. Initial analysis was inconclusive about whether the coating on the rock is material that melted during the impact event that dug the Crater.
This view is presented in Natural Color, which makes some differences between materials easier to see. It combines three separate images taken through filters admitting wavelengths of 750 nanometers, 530 nanometers and 430 nanometers. Opportunity took the image during the 2147nd Martian Day, or Sol, of the Rover's Mission on Mars (such as Feb. 6, 2010)".MareKromium
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Titan_and_Rhea-PIA12599.jpgTitanian Encounters...55 visiteCaption NASA:"The moon Rhea moves behind Saturn's largest moon, Titan, in this Mutual Event imaged by the Cassini Spacecraft.
Mutual Event sequences, in which one moon passes close to or in front of another, help scientists refine their understanding of the orbits of Saturn's moons. Part of Rhea's Southern Hemisphere is also visible here through the haze of Titan's Atmosphere.
Titan has been brightened by a factor of 1.5 relative to Rhea. This view looks toward the anti-Saturn side of Titan and the Trailing Hemisphere of Rhea.
The image was taken in Visible green Light with the Cassini spacecraft narrow-angle camera on Nov. 27, 2009. The view was obtained at a distance of approx. 1,2 MKM (about 746.000 miles) from Titan and from about 2,3 MKM (approx. 1,4 MMs) from Rhea.
Image scale in the original image was roughly 14 Km (approx. 9 miles) per pixel on Titan and about 27 Km (approx. 17 miles) per pixel on Rhea. The image has been magnified by a factor of two and contrast-enhanced to aid visibility".MareKromium
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Prometheus.jpgPrometheus55 visitenessun commentoMareKromium
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Mimas-PIA12867.jpgUneven Warmth on Mimas55 visiteThe image shows NASA's Cassini Spacecraft imaging science subsystem Visible-Light mosaic of Mimas from previous flybys on the left. The right-hand image shows the new CIRS temperature data mapped on top of the Visible-Light image.
It has to be underlined the unexpected and bizarre pattern of daytime temperatures found on Saturn's small inner moon Mimas (about 396 Km, or approx. 246 miles, in diameter). The data were obtained by the composite infrared spectrometer (CIRS) on the Cassini Spacecraft during the Spacecraft's closest-ever look at Mimas on Feb. 13, 2010.
The warm part has typical temperatures near 92 Kelvin (minus 294 Fahrenheit), while typical temperatures on the cold part are about 77 Kelvin (minus 320 Fahrenheit). The cold part is probably colder because surface materials there have a greater thermal conductivity, so the Sun's energy soaks into the Sub-surface instead of warming the Surface itself. But why conductivity should vary so dramatically across the Surface of Mimas is a mystery.
The map used to create this image is a mosaic of images taken by Cassini's imaging science subsystem cameras on previous flybys of Mimas. The cold side includes the giant Herschel Crater, which is a few degrees warmer than its surroundings. It's not yet known whether Herschel is responsible in some way for the larger region of cold temperatures that surrounds it.
Cassini took 85 minutes to make the temperature map, as the Spacecraft receded from Mimas. During that time, the distance to Mimas increased from 38.000 to 67.000 Km (such as about 24.000 to 42.000 miles) and the longitude of the center of Mimas' disk increased from 128° West to 161° West, due to the moon's rotation.
Because of this changing geometry, the alignment of the temperatures relative to specific features or coordinates on Mimas is shown only approximately. The temperatures were calculated from the brightness of the moon's infrared heat radiation, measured by CIRS at a wavelength of 12 to 16 microns".MareKromium
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Titan-PIA12843.jpgWhat's inside Titan?55 visiteCaption NASA:"This artist's illustration shows the likely interior structure of Saturn's moon Titan, as deduced from gravity field data collected by the Cassini Spacecraft. The investigation by Cassini's radio science team suggests that Titan's interior is a cool mix of ice studded with rock, though the outermost 500 Km (approx. 300 miles) appear to be ice essentially devoid of any rock.
Many planets and moons, including the Earth, evolve into a body with a clearly distinct rocky core. This radio science investigation suggests Titan's interior, cool and sluggish, failed to allow the interior to separate into completely differentiated layers of ice and rock.
In addition to the Hazy Surface of Titan (yellow), the layers in the cutaway show an ice layer starting near the Surface (light gray), an internal ocean hypothesized from other Cassini data (blue), another layer of ice (light gray) and the mix of rock and ice in the interior (dark gray). In the background are the Cassini Spacecraft and Saturn, not to scale".MareKromium
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Mimas-PIA12572.jpgHerschel Basin (False Colors; credits: NASA/JPL/SSI)55 visitenessun commentoMareKromium
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Mimas-PIA12571.jpgA "hint" of color for Mimas (possible Natural Colors; credits: Dr Paolo C. Fienga - Lunexit Team)55 visitenessun commentoMareKromium
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