| Piú viste - Titan: The "Foggy" Moon |
Titan-PIA06139.jpgTitan (false colors)53 visiteDa "NASA - Picture of the Day" del 28.10.2004:"Normally hidden by a thick, hazy atmosphere, tantalizing features on Titan's surface appear in this false-color view. The image was recorded as the Cassini spacecraft approached its first close flyby of Saturn's smog-shrouded moon on October 26. Here, red and green colors represent specific infrared wavelengths absorbed by Titan's atmospheric methane while bright and dark surface areas are revealed in a more penetrating infrared band. Ultraviolet data showing the extensive upper atmosphere and haze layers is seen as blue. Sprawling across the 5.000 Km wide moon, the bright continent-sized feature known as "Xanadu" is near picture center, bordered at the left by contrasting dark terrain.
Saturn orbiter Cassini and Titan lander Huygens plan further explorations, but for now the origin and nature of Titan's surface features remain unknown".
...Unknown, per ora, diciamo noi...
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Titan-Huygens_Landing_Site-08-PIA06136_modest.jpgHuygens' probe landing site53 visiteCaption originale NASA (dal "Planetary Photojournal"):"Shown here are two images of the expected landing site of Cassini's Huygen's probe (latitude 10.6 S, longitude 191 W). At right is a wide-angle image showing most of Titan's disc, with a scale of 10 Km (6.2 miles) per pixel. At left is a narrow-angle image of the landing site at a scale of 0.83 Km (0.5 miles) per pixel (location shown by black box at right). North is tilted about 45 degrees from the top of both images. The surface has bright and dark markings with a streamlined pattern consistent with motion from a fluid, such as the atmosphere, moving from west to east (upper left to lower right). The image at left is 400 Km (249 miles) wide. Both images were taken by Cassini's imaging science subsystem through near-infrared filters".
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Titan-PIA06138_modest.jpgTitan: the anomalous "circular" surface features are "camera artifacts"53 visiteCaption NASA originale from Planetary Photojournal:"The large, bottom image shows a complex interplay between dark and bright material on Titan's surface. This image was taken at a range of about 340.000 Km and the entire view is approximately 2.000 Km across. The surface appears to have been shaped by multiple geologic processes. Although a few "circular features" can be seen, there are no features that can be definitively identified as impact craters. The 3 smaller images show details of some of the features seen within the larger scene. The image on the upper right shows a scene approximately 500 Km across in which bright and dark bands of material span Et to Wt. The upper middle and upper right images show bright material surrounded by dark material in scenes approximately 300 Km across. The dark circular feature that appears at the top of each of the upper images is an artifact that was not removed by the preliminary image processing. There are no shadows or topographic shading visible in these images".
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Titan-PIA06183.jpgThe "yellow face" of Titan (natural colors)53 visiteCaption NASA originale:"There is a slight difference in brightness from Northern to Southern hemisphere of Titan, a seasonal effect that was noted in NASA's Voyager spacecraft images, and is also clearly visible in some of the infrared images from Cassini (see http://photojournal.jpl.nasa.gov/catalog/PIA06121).
The Northern polar region is largely in darkness at this time.
This image was taken with the Cassini spacecraft wide angle camera through using red, green and blue spectral filters were combined to create this natural color view. The image was acquired at a distance of approximately 229.000 Km from Titan and at a phase, angle of 20°. Resolution in the image is about 14 Km per pixel".
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Titan-Volcano-02.jpgThe Titanian Volcano (3)53 visiteCaption NASA originale:"From infrared images that show variations in brightness and texture, a geological map of a 'possible Titanian volcano', has been obtained using Cassini's VIMS. This geologic map shows that the circular feature has what appear to be several series of flows, as shown by the black lines. The flows represent episodes of activity on the volcano. A dark central pit, called a caldera, is similar to vents (----> aperture da sfogo; crepacci che fungono da sfogo) that appear above reservoirs of molten material on Earth's volcanoes. The colors on the map represent the brightness of features. Yellow and light green represent bright patches. Blue represents dark patches. Red represents mottled (----> screziato, a chiazze) material. The yellow area is where the volcano lies".
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Titan-Cryovolcanism-01.jpgCryovolcanism on Titan? (2)53 visiteNoi non pretendiamo di avere le conoscenze ed i mezzi di cui dispone la NASA, e non pensiamo di poter entrare in competizione con i loro Scienziati, però non siamo neppure così sprovveduti ed ignoranti dal 'bere acriticamente' tutte le spiegazioni che ci vengono offerte da questi Signori per 'salvare' il cosiddetto 'Sapere Comune'.
Conoscete il 'Rasoio di Occam'? Secondo Voi, è più probabile che:
1) il vulcano di Titano è un vulcano nel senso terrestre del termine e la temperatura superficiale di questo Pianeta, assieme a tantissimi altri dati e fenomeni (incluso il 'Red Hot Spot') attinenti la sua composizione e la sua struttura, sia superficiale, sia interna, non sono stati interpretati correttamente, oppure
2) le valutazioni NASA ed ESA sono tutte corrette ed il grande vulcano di Titano erutta ghiaccio d'acqua, fanghi a base di ammoniaca ed idrocarburi vari mentre tutto il resto del Pianeta è esattamente così come viene prefigurato dai Sacerdoti della Scienza Convenzionale?
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