| Ultimi arrivi - Saturn: the "Ringed Beauty" and His Moons |
Epimetheus-N00028511.jpgEpimetheus56 visitenessun commentoFeb 21, 2005
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Dione-N00028517.jpgDione, Epimetheus and the Rings58 visitenessun commentoFeb 21, 2005
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Saturn-W00005056.jpgSaturn, from approx. 1.130.000 Km59 visitenessun commentoFeb 21, 2005
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Tethys-N00028723.jpgTethys, Epimetheus and the Rings from approx. 1.226.000 Km72 visitenessun commentoFeb 21, 2005
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Janus-N00028725.jpgJanus and the "Lord of the Rings"59 visitenessun commentoFeb 21, 2005
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F-Enceladus-N00028770.jpgEnceladus from approx. 1.784.000 Km58 visiteUn'immagine davvero spettacolare di Encelado e (supponiamo...) Epimeteo, apparentemente "divisi" dagli Anelli di Saturno: una sorta di 'pentagramma spaziale" fatto di sottili filamenti luminosi i quali sembrano 'tagliare' il Cielo circostante.Feb 21, 2005
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Mimas-N00028766.jpgMimas and the Rings, from approx. 1.378.000 Km58 visiteUna splendida immagine, che non serve commentare.Feb 21, 2005
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Rings-PIA06588.jpgThe "rings" and a "string" of Moons...59 visiteCaption NASA originale:"Moons visible in this image: Mimas (398 Km, or 247 miles across) at right, Pandora (84 Km, or 52 miles across) near center and Janus (181 Km, or 113 miles across) in the lower left corner. Mimas' orbit inclination of 1,6° relative to Saturn's equator is enough to make it appear as if it orbits just beyond the F-Ring when viewed from this vantage point of 5° below the Rings. In fact, it is 34.000 Km (such as approx. 21.000 miles) more distant than Janus".Feb 21, 2005
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Enceladus-P-IMG001391-br500.jpgEnceladus, here and there!57 visiteEncelado: la piccola "Luna di Ghiaccio" ci mostra per intero il suo luminoso volto nell'immagine centrale (ripresa da una distanza di circa 180.000 Km) e poi alcune delle sue incredibili caratteristiche superficiali (canyons, crepacci, fratture, canali etc.), nei 2 frames di Dx e di Sx - ripresi da una distanza media di circa 24.000 Km (Sx) e 12.000 Km (Dx).Feb 19, 2005
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Enceladus-PIA06189.jpgStereo-Enceladus: ridges, trough, cracks, faults and much more!57 visiteCaption NASA originale:"Images from different directions allow construction of stereo views such as this, which are helpful in interpreting the complex topography.
This view of an area about 60 Km across shows several different kinds of ridge-and-trough topography, indicative of a variety of horizontal forces near the surface of this 505-Km diameter satellite.
Several different kinds of deformation are visible and a small population of impact craters shows that this is some of the younger terrain on Enceladus. Sunlight illuminates the scene from the bottom. Interestingly, the topographic relief is only about one kilometer, which is quite low for a small, low-gravity satellite. However, this is consistent with other evidence that points to interior melting and resurfacing in Enceladus' history. The images for this anaglyph were taken in visible light with the narrow angle camera, from distances ranging from 10.750 Km - red image) to 24.861 Km - blue image) from Enceladus".Feb 19, 2005
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Enceladus-PIA06188.jpgEnceladus "tormented" surface59 visiteCaption NASA originale:"This HR image from Cassini shows a region of "smooth plains" terrain on the surface of Saturn's moon Enceladus, located slightly north of the equator on the moon's Saturn-facing hemisphere. The area is about 70 by 84 Km.
The image shows a variety of tectonic features that attest to Enceladus' dynamic geological history. At the top of the image is a relatively fresh-looking crevasse system with individual fractures more than a kilometer wide. The crevasse system cross-cuts a complex NE-to-SW-trending system of older faults. A 12-Km-wide band of crudely aligned, chevron-shaped features runs down the center of the image. Among the most intriguing features in this view are a series of dark, small spots, 125 to 750 meters in diameter.
The "dark spots" often seem to be aligned in chains parallel to narrow fractures. The contrast of the dark features with the surrounding bright terrain suggests that they may be compositionally distinct, but their origin is a new mystery". Feb 19, 2005
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Enceladus-PIA06191.jpgEnceladus: photomosaic58 visiteCaption NASA originale:"The view is about 300 Km across and shows the myriad of faults, fractures, folds, troughs and craters that make this Saturnian Satellite especially intriguing to planetary scientists. More than 20 years ago, NASA's Voyager spacecraft gave hints of a surface cut by tectonic features and subsequent images of other icy moons have revealed many different ways that stresses have acted on icy moon crusts. The new close-up images of Enceladus, which has a diameter of 505 Km, show some familiar-looking features and others that are brand new. Extending downward from the top center of the mosaic for hundreds of kilometers is a broad belt of complex, interwoven fractures. A huge rift 5 Km-wide dissects this belt and extends into several older-looking, distinct regions or "cells" of terrain that themselves exhibit distinct fracture patterns. The work required to unravel their origins, their formation sequence, and the implications for the evolution of icy Solar System bodies is just beginning...".Feb 19, 2005
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