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Tethys-N00086709.jpgThe cratered Lands of Tethys (4)56 visitenessun commentoMareKromium
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Helene-N00086688.jpgJust like Phobos: Helene (2)56 visitenessun commentoMareKromium
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Helene-N00086687.jpgJust like Phobos: Helene (1)56 visitenessun commentoMareKromium
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Helene-N00086698.jpgJust like Phobos: Helene (4)56 visitenessun commentoMareKromium
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Helene-N00086694.jpgJust like Phobos: Helene (3)56 visitenessun commentoMareKromium
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Dione-N00086773.jpgCrossing the Rings (2)56 visiteCaption NASA:"N00086773.jpg was taken on July 22, 2007 and received on Earth July 23, 2007. The camera was pointing toward DIONE that, at the time, was approx. 710.911 Km away.
The image was taken using the CL1 and GRN filters and it has not been validated or calibrated".MareKromium
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The_Rings-PIA08990.jpgStartrails through the D-Ring56 visiteCaption NASA:"Faint features in Saturn's innermost ring, the D-Ring, are brought into view in this strongly contrast-enhanced Cassini image. A few background stars are visible through the sheer ring as squiggly star trails.
The inner region of the C-Ring is seen at upper left. The faint diagonal wedge shape on the left side of the image was caused by stray light in the camera optics. The view looks toward the sunlit side of the Rings from about 18° below the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 12, 2007 at a distance of approx. 238.000 Km (about 148.000 miles) from Saturn.
Image scale is roughly 1 Km (0,6 miles) per pixel".MareKromium
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OPP-SOL1235-PIA09935-DustStorm.gifPlanetary Dust Storm (GIF Movie)56 visiteNASA's Opportunity rover is literally seeing some of its darkest days. Both Mars Exploration Rovers have been riding out a regional dust storm for several weeks. Conditions became particularly dreary in the Meridiani Planum region where Opportunity sits, perched on the edge of "Victoria Crater."
This image is a time-lapse composite where each horizon-survey image has been compressed horizontally (but not vertically) to emphasize the sky. The relative brightness and darkness of the sky from sol to sol (over a 30-sol period beginning June 14, 2007) is depicted accurately in these images, which view roughly the same part of the plains southwest of the rover. The images are approximately true color composites, generated from calibrated radiance data files using the panoramic camera's 601-nanometer, 535-nanometer and 482-nanometer filters.
The rovers' atmospheric science team is concerned that smaller, regional dust storms could expand into a larger, globe-encircling storm. That could extend the time the sun stays obscured, challenging the capability of Opportunity's solar panels to produce enough electricity for the rover to function.
Fortunately, as of July 19, 2007, the Opportunity site is clearing slightly. When the storm ends, atmospheric scientists hope to review data from the rovers that will help them determine what sort of dust was being lifted and distributed.
The numbers across the top of the image report a measurement of atmospheric opacity, called by the Greek letter tau. The lower the number, the clearer the sky. Both Opportunity and Spirit have been recording higher tau measurements in July 2007 than they had seen any time previously in their three and a half years on Mars. The five sol numbers across the bottom correspond (left to right) to June 14, June 30, July 5, July 13 and July 15, 2007.
MareKromium
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Enceladus-N00086994.jpgSpace Encounter: Enceladus and Tethys (3)56 visitenessun commentoMareKromium
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Saturn-PIA08992.jpgSurging Across the Rings56 visiteCaption NASA:"A surge in brightness appears on the Rings directly opposite the Sun from the Cassini Spacecraft. This "opposition surge" travels across the Rings as the Spacecraft watches. This view looks toward the sunlit side of the Rings from about 9° below the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft wide-angle camera on June 12, 2007 using a spectral filter sensitive to wavelengths of infrared light centered at 853 nanometers.
The view was acquired at a distance of approx. 524.374 Km (such as about 325.830 miles) from Saturn.
Image scale is 31 Km (about 19 miles) per pixel".MareKromium
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as17-152-23330.jpgAS 17-152-23330 - Lunar Maria: Crisium and Tranquillitatis (elab. in true colors by Lunexit)56 visitenessun commentoMareKromium
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C-Phoenix-PolarDunes.jpgPossible Northern Scenarios (1) - Dark Dunes and Ice56 visitenessun commentoMareKromium
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