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Titan-Undefined_Surface_Features-Radar_View-PIA06995_modest.jpgAnother "radar view" from Titan: the "arrow"55 visiteOccorre la Caption NASA originale per tentare di capire qualcosa di questa "oscura" (da tutti i punti di vista) immagine radar di Titano: "...the (arrow-like) "feature" is approximately 30 Km across and it is formed from 2 straight lines that intersect. Looking more closely, one can distinguish other linear features that seem to follow the left side of the "arrow" and perhaps interact in some way with a dark spot. Straight lines may represent fractures or faults in the icy crust, or they may form from material that has flowed or has been shaped by wind, either recently or in the distant past.
The area shown is about 115 Km wide and 170 Km high and is located near 52° North latitude and 73° West longitude. This radar image is part of a larger strip of data acquired on Oct. 26, 2004, as Cassini passed Titan at a distance of 1.200 Km".
Secondo noi il rilievo che alla NASA chiamano "freccia" potrebbe essere una sorta di ciglio roccioso ma, come vedete Voi stessi, con un'immagine così...ogni ipotesi è buona!
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Titan-Volcanic_Features-PIA12111.jpgSouth Polar Basin55 visiteCaption NASA:"An enigmatic large Basin appears in the South Polar Region of Saturn's moon Titan at the center of this Titan Radar Mapper image from NASA's Cassini Spacecraft acquired on June 22, 2009.
The Basin has several possible origins.
It may be a Volcanic Caldera, produced by collapse after cryovolcanic eruptions.
It might be a Modified Impact Basin, partially infilled with sedimentary material.
Alternately, the basin may have formed by some other collapse process related to the presence of Subsurface Methane.
Evidence for lakes elsewhere on Titan suggests that it might have been later partially filled with liquid Methane and Ethane".
MareKromium
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Titan-Volcano-00-PIA07961.jpgThe Titanian Volcano (1)76 visiteCaption NASA originale:"On Oct. 26, 2004, the Cassini spacecraft flew over Titan at less than 1.200 Km at closest approach. Cassini acquired several infrared images with spatial resolution ranging from a few tens of Km to 2 Km per pixel. The Visual and Infrared Mapping Spectrometer took images from visible wavelengths to the 5,1 micron wvlgts. This figure shows the mosaic obtained at the 2,03 micron wvlgt - observations are centered on the hemisphere of Titan that points away from Saturn. The left (inset) HR image is 30 Km per pixel. It shows the site where the ESA's Huygens probe successfully landed on Jan. 14, 2005. The right inset shows a circular feature that scientists think is a volcano, which may be responsible for replenishing Titan's methane atmosphere".
Nota: la notizia viene inserita nel corpo del testo, silenziosamente, come se si trattasse di un fatto marginale nel quadro di una notizia irrilevante. Ma guardate e leggete i frames successivi...
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Titan-Volcano-01-PIA07961.jpgThe Titanian Volcano (2)55 visiteCaption NASA originale:"Details of the circular feature, that scientists think is an ice volcano, which could be a source of methane in Titan's atmosphere, show up at wvlgts larger than 1,3 microns (1 micron is one-millionth of a meter; 1 meter is 39"). The first 6 panels are images of the feature taken in 6 infrared windows. Images made up of two colors (ratio images) are represented in order to visualize compositional variations, which appear to be slight. The last panel is a color composite image (red, 2,75 micron; green, 2 micron; blue, 1,6 micron). These images were acquired with Cassini's VIMS. Titan, Saturn's largest moon, is the only known moon to have a significant atmosphere, composed primarily of Nitrogen, with CH4 (about 2/3%) as the largest remaining component. One goal of the Cassini mission is to find an explanation for what is replenishing and maintaining this atmosphere".
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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-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?!?
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Titan-W00002390.jpgThe "Dark Side" of Titan from about 107.000 Km67 visiteLa Sonda Cassini-Huygens è passata accanto a Titano ed ora se ne sta rapidamente allontanando. Questa immagine è stata ripresa quando Titano era già stato superato di oltre 100.000 Km. Si tratta, come potete intuire, di una ripresa del lato di Titano immerso nella notte, mentre la luce che emerge dal bordo del Pianeta - formando una sorta di "aureola" - è causata dai raggi del Sole che passano attraverso gli strati superiori della sua atmosfera, generando un curioso fenomeno di diffusione luminosa.
Questo tipo di immagine, oltre ad essere piuttosto suggestiva, ci permette anche di vedere abbastanza bene i vari sub-strati in cui si suddivide (o sembra suddividersi...) l'atmosfera di Titano.
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Titan-W00002390.jpgFrom the Dark Side... (Natural - but enhanced - Colors; credits: Lunar Explorer Italia)57 visitenessun commentoMareKromium
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Titan-W00003515.jpgFrom the Dark Side... (Natural Colors; credits: Lunar Explorer Italia)54 visitenessun commentoMareKromium
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Titan-W00003639.jpgClouds around Titan55 visiteImmagine di Titano ripresa da circa 29.000 Km. Oltre alle nuvole (sempre bianche e vaporose) non si riesce a distinguere alcun dettaglio della superficie di questa luna.
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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".
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Titan-W00012686.jpgTitans... (1)56 visiteOriginal caption:"W00012686.jpg was taken on December 26, 2005 and received on Earth December 27, 2005. The camera was pointing toward TITAN that, at the time, was approximately 23.945 Km away
The image was taken using the CL1 and RED filters".
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