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| Ultimi arrivi - Titan: The "Foggy" Moon |
Titan-Regions-Shikoku_Facula-PIA08426.jpgThe Brightest Region of Titan: Shikoku Facula61 visiteCaption NASA originale:"This image of Saturn's moon Titan from the Synthetic Aperture Radar Instrument on the Cassini spacecraft shows Shikoku Facula, a Region that is bright in both radar and visible wavelengths. This radar image was taken on April 30, 2006.
A circular feature with a radar-dark interior, probably an impact crater, is seen near the top of the image and is about 35 Km (about 22 miles) in diameter.
Numerous linear dark features are seen running across the image, mostly on the right-hand side. These features were seen on other radar images and interpreted as dune fields. Bright, ridge-like features mainly on the lower half of the image may be topographically "High Regions" (qualcosa di simile alle HighLands della Scozia). Radar-dark, thin, sinuous features, which may be channels draining from the bright to the dark Regions, are seen below the circular feature".Mag 05, 2006
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Titan-PIA08167.jpgTitan's foggy Northern "Cap" (Original NASA/JPL/SSI b/w RAW Frame)54 visiteCaption NASA:"The complex and dynamic Atmosphere of Titan displays multiple Haze Layers near the North Pole in this view, which also provides an excellent look at the detached Stratospheric Haze Layer that surrounds the moon at lower Latitudes.
North on Titan is up and rotated 20° to the left.
The image was taken with the Cassini Spacecraft narrow-angle camera on March 16, 2006, using a filter sensitive to wavelengths of UltraViolet Light centered at 338 nanometers. The image was obtained at a distance of approx. 1,2 MKM (about 800.000 miles) from Titan and at a Sun-Titan-Spacecraft, or Phase, Angle of 68°. Image scale is approx. 7 Km (such as about 5 miles) per pixel". Apr 28, 2006
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Titan-PIA08157.jpgTitan & Epimetheus54 visiteCaption originale:"This poetic scene shows the giant, smog-enshrouded moon Titan behind Saturn's nearly edge-on Rings.
Much smaller Epimetheus (116 Km - or 72 miles - across) is just visible to the left of Titan (5.150 Km - or 3.200 - miles across).
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on March 9, 2006, at a distance of approx. 4,1 MKM (such as about 2,5 MMs) from Titan. The image scale is 25 Km (about 16 miles) per pixel on Titan. The brightness of Epimetheus was enhanced for visibility purposes".Apr 15, 2006
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Titan-N00055573.jpgWhat's happening on Titan? (8)56 visiteA dire il vero, qualcosa - nella zona in cui il fenomeno si era manifestato inizialmente - sarà ancora visibile in alcuni dei frames successivi al n. N00055569.jpg ma - onestamente - ci è impossibile dire (usando i nostri mezzi) se il debole punto chiaro che sembra ancora vedersi è un residuo del fenomeno iniziale (e cioè una fase diversa del medesimo evento) oppure se si tratta solo di un difetto dell'immagine, di un pixel "cattivo" o di chissà cosa d'altro.
Caption NASA:"N00055573.jpg was taken on March 20, 2006 and received on Earth March 20, 2006. The camera was pointing toward Titan that, at the time, was 977.035 Km away.
The image was taken using the P60 and CB1 filters"".Mar 21, 2006
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Titan-N00055570.jpgWhat's happening on Titan? (7)57 visiteE come l'Anomalìa era apparsa (improvvisamente), così essa scompare, dopo essere stata ripresa per svariati frames.
La "sparizione" sarà dipesa dal cambio di filtro o da altre motivazioni che, al momento, ci sfuggono? Voi che ne dite? Che cosa abbiamo realmente guardato?...
Caption NASA:"N00055570.jpg was taken on March 20, 2006 and received on Earth March 20, 2006. The camera was pointing toward Titan that, at the time, was approximately 974.967 Km away.
The image was taken using the P120 and GRN filters".Mar 21, 2006
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Titan-N00055569.jpgWhat's happening on Titan? (6)60 visiteCaption NASA:"N00055569.jpg was taken on March 20, 2006 and received on Earth March 20, 2006. The camera was pointing toward Titan that, at the time, was approximately 974.790 Km away.
The image was taken using the P120 and BL2 filters".Mar 21, 2006
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Titan-N00055568.jpgWhat's happening on Titan? (5)56 visiteCaption NASA:"N00055568.jpg was taken on March 20, 2006 and received on Earth March 20, 2006. The camera was pointing toward Titan that, at the time, was approximately 974.091 Km away.
The image was taken using the P60 and BL2 filters".
Nota: le nostre ipotesi, se non fossimo in presenza di un photoartifact, sono fondamentalmente due.
Si potrebbe trattare di una (gigantesca) Volcanic Plume (sul tipo di quelle riscontrate sulla luna Gioviana "Io") oppure di una nuvola anomala (ed anch'essa gigantesca), colonnare, molto brillante (siamo a quasi un 1 MKM di distanza e già riusciamo a vederla!...) e, come ovvio, del tutto inesplicabile.
Abbiamo un frame relativo ad una formazione nuvolosa anomala anche su Marte (Sez. Mars in Colors), ma la distanza da cui la ripresa era stata effettuata non è neppure lontanamente comparabile a quella che invece divide Cassini da Titano, in questo frame.Mar 21, 2006
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Titan-N00055567.jpgWhat's happening on Titan? (4)57 visiteCaption NASA:"N00055567.jpg was taken on March 20, 2006 and received on Earth March 20, 2006. The camera was pointing toward Titan that, at the time, was approximately 973.393 Km away.
The image was taken using the P0 and BL2 filters".
Nota: e se non si trattasse di un photoartifact, che cosa potrebbe essere il "punto" che abbiamo evidenziato?Mar 21, 2006
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Titan-N00055566.jpgWhat's happening on Titan? (3)59 visiteCaption NASA:"N00055566.jpg was taken on March 20, 2006 and received on Earth March 20, 2006. The camera was pointing toward Titan that, at the time, was approximately 972.794 Km away.
The image was taken using the P0 and UV3 filters".Mar 21, 2006
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Titan-N00055565.jpgWhat's happening on Titan? (2)65 visiteCaption NASA:"N00055565.jpg was taken on March 20, 2006 and received on Earth March 20, 2006. The camera was pointing toward Titan that, at the time, was approximately 972.114 Km away.
The image was taken using the P60 and UV3 filters".Mar 21, 2006
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Titan-N00055564.jpgWhat's happening on Titan? (1)64 visiteCiò che Vi proponiamo in questa (lunga) sequenza di Titano potrebbe essere il frutto di una mera "misinterpretation" delle immagini (come ci direbbero i Signori del CICAP e gli Amici della NASA) oppure, come a noi piace credere, potrebbe trattarsi di un interessante fenomeno che prende le mosse e si sviluppa (o così pare) negli strati più alti dell'atmosfera di Titano.
Si tratta, in fondo, solo di un minuscolo "punto" ambiguo (9 pixels effettivi di diametro) che, nel tempo, sembra svilupparsi e che poi, improvviso come era arrivato, scompare.
Guardate ed esaminate anche Voi...
Nota: va detto, per correttezza, che la maggior parte dei frames che Vi proporremo è - purtroppo - piena di photoartifacts, anche se il "punto" che abbiamo cerchiato, a differenza degli altri difetti, si mantiene in una posizione che noi definiamo "coerente", nel tempo.
Caption NASA:"N00055564.jpg was taken on March 20, 2006 and received on Earth March 20, 2006. The camera was pointing toward Titan that, at the time, was about 972.114 Km away. The image was taken using the P120 and UV3 filters".Mar 21, 2006
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Titan-PIA08137.jpgHaze-layers and a bright "spot", from 2,3 MKM!55 visiteLe nebbie di Titano sono ormai una realtà acquisita e consolidata, ma le Singolarità Atmosferiche (non sappiamo come altro chiamarle, per ora...) che la Sonda Cassini, di tanto in tanto, riesce a fotografare mentre si sporgono attraverso le nuvole di questo pianeta, costituiscono ancora un mistero. In questo frame, cerchiato in bianco, un "qualcosa" che emerge dalla densa atmosfera di Titano e che non è stato censurato dagli "Amici di Pasadena". Non si tratta, per ovvi motivi, di un rilievo superficiale e non è neppure un photoartifact (ormai avete anche Voi esperienza sufficiente per riconoscere "ictu oculi" un artefatto fotografico da un oggetto reale).
E' una Sonda Aliena in ricognizione? E' una "plume" vulcanica o magari una "nuvola colonnare" (evento più unico che raro nell'intero Sistema Solare)?
Che cosa stiamo guardando, in realtà?!?...
This composite of 24 images from the Cassini spacecraft shows multiple layers in Titan's stratospheric haze. The most prominent layer is located about 500 Km above the surface and is seen at all latitudes, encircling the moon. The material in this layer is probably a condensed substance, possibly water ice.
Several other layers are most apparent in the north polar hood (at top), but this view also shows some at other latitudes. The mechanisms that produce these layers are not understood, but waves in the atmosphere are thought to play a significant role.
The images in this composite were taken over a period of 23 minutes. The images were processed to enhance fine detail and then were combined to create this view. North on Titan (5,150 kilometers, or 3,200 miles across) is up.
The images were taken in visible light with the narrow-angle camera on Jan. 27, 2006 at a distance of approximately 2.3 million kilometers (1.4 million miles) from Titan and at a Sun-Titan-spacecraft, or phase, angle of 155 degrees. Image scale is 13 kilometers (8 miles) per pixel.
Mar 20, 2006
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