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OPP-SOL012.jpgUndisturbed Soil - Sol 12 (natural colors; credits: Dr G. Barca)55 visitenessun commentoMareKromium
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SOL807-2N198008906EFFAR00P1987R0M1.jpgPossible indirect evidence of Mars' "reddish" Sky - Sol 807 (MULTISPECTRUM; credits: Lunexit)55 visitenessun commentoMareKromium
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ZZ-Mercury-Craters-Unnamed_Rayed_Crater-209510.jpgRayed Crater on Mercury55 visiteJust above and to the left of center of this image is a small crater with a pronounced set of bright rays extending across Mercury's surface away from the crater. Bright rays are commonly made in a crater-forming explosion when an asteroid strikes the surface of an airless body like the Moon or Mercury. But rays fade with time as tiny meteoroids and particles from the Solar Wind strike the surface and darken the rays. The prominence of these rays implies that the small crater at the center of the ray pattern formed comparatively recently.
This image is 1 in a planned set of 99. Nine different views of Mercury were snapped in this set to create a mosaic pattern with images in 3 rows and 3 columns. The WAC is equipped with 11 narrow-band color filters, and each of the 9 different views was acquired through all 11 filters. This image was taken in filter 7, which is sensitive to light near the red end of the visible spectrum (750 nm), and shows features as small as about 6 Km (about 4 miles) in size.
The MESSENGER team is studying this previously unseen side of Mercury in detail to map and identify new geologic features and to construct the Planet’s geological history.
Mission Elapsed Time (MET) of image: 108827618MareKromium
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SOL1434-2N253666065EFFAX05F0006L0M1.jpgMartian Sky... (1) - Sol 1434 (MULTISPECTRUM; credits: Lunexit)55 visitenessun commentoMareKromium
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as15-86-11619.jpgAS 15-86-11619 - Hadley Rille Panorama (1)55 visiteCaption NASA:"Hadley Rille from the first Station 6 Sampling Site".MareKromium
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OPP-SOL330-1~0.jpgTrash! - Sol 330 (True Colors + MULTISPECTRUM; credits: Dr G. Barca & Lunexit)55 visitenessun commentoMareKromium
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SOL180.jpgRover Tracks and "emerging" Sulphates (?) - Sol 180 (credits: Dr M. Faccin)55 visitenessun commentoMareKromium
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Saturn_Titan-PIA09856.jpgFather and Son (natural colors; credits: NASA)55 visiteCaption NASA:"The Cassini Spacecraft captured this color portrait of Saturn and Titan only a few minutes before the haze-enshrouded moon slipped behind the planet's enormous bulk. The view looks toward the sunlit side of the Rings from about 5° below the Ring-Plane.
The Northern Hemisphere of Titan presently appears darker than the Southern, a feature presumed to be a seasonal effect.
Images taken using red, green and blue spectral filters were combined to create this natural color view. The images were acquired with the Cassini spacecraft wide-angle camera on Jan. 29, 2008 at a distance of approx. 2,3 MKM (such as about 1,4 MMs) from Titan and approx. 1 MKM (about 630.000 miles) from Saturn.
Image scale is roughly 135 Km (about 84 miles) per pixel on Titan and approx. 61 Km (about 38 miles) per pixel on Saturn".MareKromium
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AS15-88-12002HR-6.jpgAS 15-88-12002 - The "Bridge" (extra-detail mgnf n. 5; credits: Dr G. Barca)55 visitenessun commentoMareKromium
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AS15-88-12002HR-3.jpgAS 15-88-12002 - The "Bridge" (extra-detail mgnf n. 2; credits: Dr G. Barca)55 visitenessun commentoMareKromium
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Enceladus-IMG002995-br500.jpgArabian Nights...On Enceladus!55 visiteCaption NASA:"This 3-image mosaic is the highest resolution view yet obtained of Enceladus' North Polar Region. The view looks southward over cratered plains from high above the North Pole of Enceladus.
Cassini's March 2008 flyby of Enceladus was designed to directly investigate the ongoing plume activity at the moon’s South Pole, but the path of the spacecraft allowed investigation of older evidence for internal activity near the North Pole.
Compared to much of the moon's Southern Hemisphere - the South Polar Region in particular - the North Polar Region is much older and covered with craters. These craters are captured at different stages of disruption and alteration by tectonic activity and probably past heating from below. Many of the craters seen here are sliced by small parallel cracks that seem to be ubiquitous throughout the old cratered terrains on Enceladus. The mosaic also shows a variety of impact crater shapes, some with bowed-up floors and smaller craters within, very likely indicating that the icy crust in this area was at some time warmer than at present. While this conclusion was previously reached from NASA Voyager spacecraft images, these new data provide a much more detailed look at the fractures that modify the surface. This data will give a significantly improved comparison of the geologic history at the satellite's north pole with that at the South Pole.
Two prominent craters in this view, Ali Baba and Aladdin (the two overlapping craters near center), are among the largest craters known on Enceladus.
Several areas of much younger terrain are visible in this mosaic, including Samarkand Sulci, an area of disrupted terrain that runs North-South at left of center, and the "Leading Hemisphere Terrain", a region, seen at right, filled with tectonic fractures, ridges and "ridged terrain".
Samarkand Sulci slices through some prominent craters that were seen in Voyager images. At that time, it was thought that the portions of the craters that extend into Samarkand were completely destroyed by whatever process formed Samarkand. However, Cassini images show remnants of the crater rims that have survived. This new insight provides a benchmark for measuring how tectonic processes modify older terrains, and will also help imaging scientists develop a more accurate timeline for the geologic history of these terrains.
Lit terrain seen here is on the Saturn-Facing Hemisphere of Enceladus.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on March 12, 2008. The view was acquired at a distance of approx. 32.000 Km (about 20.000 miles) from Enceladus and at a Sun-Enceladus-spacecraft, or phase, angle of 115°.
Image scale is roughly 176 meters (577 feet) per pixel".MareKromium
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SOL239-2N147592818EFF8800P0311R0M1.jpgEvening on the Hills - Sol 239 (possible True Colors; credits: Lunexit)55 visitenessun commentoMareKromium
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