| Piú votate - Titan: The "Foggy" Moon |
Titan-PIA07701~0.jpgThe atmosphere of Titan54 visiteThis view of Titan reveals structure in the moon's complex atmosphere. The geometry of the Cassini spacecraft's view of Titan during this flyby was similar to that of Voyager 1's pass in 1980.
The image was taken in visible violet light and shows the detached high haze layer that envelops Titan, with additional complexity to its structure in the far North. Some of this atmospheric structure is also visible in a color view (PIA07700) taken at about the same time..
The image was taken with the Cassini spacecraft wide-angle camera on Dec. 26, 2005, at a distance of approx. 194.000 Km (such as about 121.000 miles) from Titan and at a Sun-Titan-spacecraft, or phase, angle of 29°. The image scale is 11 Km (about 7 miles) per pixel.
(6 voti)
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Titan-W00012609.jpgHidden Land, strange "clouds"...68 visiteOriginal caption:"W00012609.jpg was taken on December 26, 2005 and received on Earth December 27, 2005. The camera was pointing toward TITAN at approximately 38,016 kilometers away, and the image was taken using the CB3 and CL2 filters. This image has not been validated or calibrated".
(6 voti)
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Titan-Regions-Fensal_Region-PIA07753.jpgThe "New World": Fensal Region and more55 visiteOriginal caption:"Like an ancient mariner charting the coastline of an unexplored wilderness, Cassini's repeated encounters with Titan are turning a mysterious world into a more familiar place.
During a Titan flyby on Sept. 7, 2005, the spacecraft's narrow-angle camera acquired multiple images that were combined to create the mosaic presented here. Provisional names applied to Titan's features are shown.
The image shows more than half of Titan's Saturn-facing hemisphere at moderate resolution, including the Fensal-Aztlan region, formerly known as "the H." This view is centered at 6,5° North Lat. and 20,6° West Long. and has a pixel scale of approx. 2 Km (about 1 mile) per pixel.
It is an orthographic projection, rotated so that North on Titan is up.
This view is composed of 20 images obtained on Sept. 7, 2005, each processed to enhance surface detail".
(6 voti)
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Titan-Regions-Shangri_La_and_Xanadu_Region-PIA07752.jpgThe "New World": Shangri-La and Xanadu Region60 visiteOriginal caption:"This mosaic is a HR close-up of two contrasting Regions: dark Shangri-La and bright Xanadu. This view has a resolution of 1 Km (such as 0,6 mile) per pixel and is centered at 2,5° North Lat. and 145° West Long., near the feature called Santorini Facula.
The mosaic is composed of 10 images obtained on Oct. 28, 2005, each processed to enhance surface detail. It is an orthographic projection, rotated so that North on Titan is up".
(6 voti)
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Titan-Shoreline-PIA03563_modest.jpgShoreline on Titan?54 visiteCaption originale:"This SAR (Synthetic Aperture Radar) image of the surface of Saturn's moon Titan, was obtained by the Cassini spacecraft on Sept. 7, 2005. The bright, rough Region on the left side of the image seems to be topographically "high terrain" that is cut by "channels" and "bays".
The boundary of the bright (rough) Region and the dark (smooth) Region appears to be a "shoreline". The patterns in the dark area indicate that it may once have been flooded, with the liquid having at least partially receded.
The image is 175 Km high and 330 Km wide (about 109 by 205 miles), and is located at 66 degrees south latitude, 356° West Longitude in the Southern Hemisphere of Titan".
(6 voti)
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Titan-Regions-Fensal_and_Aztlan_Region-PIA07732.jpgFensal and Aztlan Region on Titan57 visiteDuring its Sept. 7, 2005, flyby of Titan, Cassini acquired images of territory on the moon's Saturn-facing hemisphere that were assembled to create this mosaic. Once known only as "The H" because the Region looks something like the letter on its side, features in this Region now possess provisional names. The Northern Branch of the H is now called Fensal, while the Southern Branch is known as Aztlan.
Fensal is littered with small "islands" ranging in size from 5 to 40 Km across. These landforms currently are thought to be water ice upland areas, surrounded by shallower terrain that is filled-in with dark particulate material from the atmosphere. A few larger islands are also seen, like Bazaruto Facula (near right, containing a dark crater) and several islands in Western Fensal. When viewed in images of Shangri-La (on the other side of Titan), island-like landforms of this size tend to occur in clusters with apparent preferred orientations. The small islands in Fensal appear much more scattered (and most appear roughly circular), although a few islands do have an east-west orientation to their long axis.
Aztlan, on the other hand, appears comparatively devoid of small islands, with three large islands in its western reaches, plus only a few smaller islands. The largest of these islands is called "Sotra Facula" (just right of center in the bottom left mosaic frame), and measures 240 by 120 kilometers (149 to 75 miles) across.
(6 voti)
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Titan-PIA07729.jpgTitan, from about 213.000 Km (natural colors)55 visiteAs Cassini approached Titan on Aug. 21, 2005, it captured this natural color view of the moon's orange (nota: veramente, a parte i nostri occhi - che, come tutti sanno, possono sbagliare -, il software che utilizziamo per valutare la densità cromatica dei frames NASA che pubblichiamo e che ci permette altresì di identificare i 'colori maggiori' che sono presenti in essi ci dice che il colore dominante è il "giallo"...), global smog. Titan's hazy atmosphere was frustrating to NASA Voyager scientists during the first tantalizing Titan flybys 25 years ago, but now Titan's surface is being revealed by Cassini with startling clarity (...).
Images taken with the wide-angle camera using red, green and blue spectral filters were combined to create this color view. The images were acquired at a distance of approximately 213.000 Km from Titan and at a Sun-Titan-spacecraft, or phase, angle of 55°. Resolution in the image is about 13 Km per pixel.
(6 voti)
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Titan-IR-PIA07542.jpgInfrared Titan (from approx. 1,2 MKM)56 visiteCaption NASA originale:"Southeast of Xanadu (and above the center in this view) is a peculiar semi-circular feature informally referred to by imaging scientists as "The Smile". This surface feature is the brightest spot on Titan's surface, not only to the Imaging Science Subsystem Cameras, but also to the Visual and Infrared Mapping Spectrometer (VIMS), which sees the surface at even longer wavelengths. "The Smile" is about 560 Km (345 miles) wide.
At the landing site of the successful Huygens probe mission, brighter regions correspond to icy upland areas, while the darker regions are lowlands that possess a higher proportion of the organic byproducts of Titan's atmospheric photochemistry. Those results seem to confirm the long-standing hypothesis that Xanadu is a relatively high region of less contaminated ice. However, the cause of the even brighter Smile is a mystery that is still under study. Farther South, a field of bright clouds arcs around the Pole, moving at a few meters per second".
(6 voti)
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Titan-Volcano-03-PIA07962.jpgThe Titanian Volcano (4)55 visiteCaption NASA originale:"This HR infrared image was (...) obtained by Cassini's VIMS and shows a bright, circular feature (8,5° Lat.; -143,5° Long.) with two elongated wings extending westwards".
Dunque: anche se i commenti NASA sono veramente 'minimalisti' (ai limiti del ridicolo), sembra ormai chiaro che su Titano esiste una 'fornace attiva' di un qualche tipo. Al di là delle riflessioni che già si potrebbero avviare sulla incompletezza della nostra Scienza e sulle conseguenti stupidaggini dette e scritte in passato a proposito di questo Pianeta, possiamo dire che siamo davanti, in ogni caso, ad un'evidenza incontestabile del fatto che Titano è un mondo 'geologicamente vivo e vegeto'. Vi sembra questa una notizia da poco?
Adesso, a nostro parere, tutti noi (Ricercatori e Scienziati) abbiamo una buona base fattuale per fare autocritica ed iniziare a rivedere le nostre cognizioni in materia di Scienze Planetarie e Dinamiche Evolutive dei corpi celesti ma...avremo l'umiltà per farlo?!?
(6 voti)
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Titan-Atmosphere-PIA06224.jpgThe "Hig-Haze Layers" of Titan55 visiteCaption NASA originale:"Titan's "High Haze Layers" are amazing. Cassini captured this detailed view of the relatively faint haze in Titan's upper atmosphere as it receded from its close encounter on March 31, 2005. Similar examples of such complex structures in Titan's haze have been observed previously by Cassini. These observations will help reveal the processes responsible for forming the numerous layers that we see and how the structure and behavior of the layers change on daily and seasonal time scales.
The image was taken with the Cassini spacecraft narrow-angle camera using a filter sensitive to wavelengths of ultraviolet light centered at 338 nnmts and at a distance of 102.320 Km from Titan. Image scale is about 600 mt per pixel".
(6 voti)
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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".
(6 voti)
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Titan-Atmosphere-N00027972.jpgThe "Foggy" Limb of Titan57 visitenessun commento
(6 voti)
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