| Ultimi arrivi - Titan: The "Foggy" Moon |
Titan-N00091172.jpgTitan56 visiteCaption NASA:"N00091172.jpg was taken on September 02, 2007 and received on Earth September 03, 2007. The camera was pointing toward TITAN that, at the time, was approximately 1.319.014 Km away, and the image was taken using the CL1 and CB3 filters. This image has not been validated or calibrated".MareKromiumSet 04, 2007
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Titan-Atmosphere-N00091073.jpgIn the Night of Titan - (possible natural colors; elab. Lunexit)56 visiteCaption NASA:"N00091073.jpg was taken on August 30, 2007 and received on Earth September 01, 2007. The camera was pointing toward TITAN that, at the time, was approx. 138.726 Km away, and the image was taken using the CL1 and UV3 filters. This image has not been validated or calibrated".MareKromiumSet 02, 2007
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Titan-PIA09007.jpg...Ring of Fire... (natural colors; elab. Lunexit)56 visiteCaption NASA:"This celestial circle of light is produced by the glow of Sunlight scattered through the periphery of Titan's atmosphere as the Sun is occulted by Titan. It is the sum of all the sunsets and sunrises taking place on Titan at once.
The intriguing structure of Titan's North Polar "hood" can be seen at upper left.
A thin, detached, high-altitude global haze layer encircles the moon.
North on Titan is up and rotated 23° to the left.
The image was taken in visible blue light with the Cassini spacecraft wide-angle camera on June 29, 2007. The view was obtained at a distance of approx. 210.000 Km (about 131.000 miles) from Titan and at a Sun-Titan-spacecraft, or phase, angle of 167°.
Image scale is roughly 12 Km (about 8 miles) per pixel".MareKromiumAgo 16, 2007
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Titan-Regions-Adiri_Region-PIA08995.jpgFlying over Adiri57 visiteCaption NASA:"Within the windswept wastes of Titan's Equatorial Dune Desert lies the 1.700-Km (1.050-mi) wide bright Region called Adiri, seen here at center.
The intrepid Huygens probe landed off the North-Eastern edge of Adiri in January 2005.
This view looks toward the Anti-Saturn side of Titan (5.150 Km, or about 3.200 miles across) -- the side that always faces away from Saturn as the moon orbits. North on Titan is up and rotated 26° to the right.
The image was taken using a spectral filter sensitive to wavelengths of infrared light centered at 939 nanometers. The view was acquired with the Cassini spacecraft wide-angle camera on June 14, 2007 at a distance of approx. 157.000 Km (about 98.000 miles) from Titan. Image scale is roughly 9 Km (about 6 miles) per pixel".MareKromiumLug 31, 2007
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Titan-Regions-Shangri_La_Region-PIA08971.jpgShangri-la and other Equatorial Regions of Titan59 visiteCaption NASA:"This view of Titan's surface highlights NorthWestern Shangri-la - a large, Equatorial Dark Region revealed by radar observations to be covered in longitudinal dune fields. The bright, circular feature right of center is a potential impact crater - few of which have been spotted on Titan thus far.
North on Titan is up and rotated about 15° to the right. This view was created by combining multiple images taken using a combination of spectral filters sensitive to wavelengths of infrared light centered at 938 and 619 nanometers.
The images were taken with the Cassini spacecraft narrow-angle camera on May 13, 2007 at a distance of approx. 125.000 Km (about 77.000 miles) from Titan. Image scale is roughly 1 Km (0,6 miles) per pixel. Due to scattering of light by Titan's hazy atmosphere, the sizes of surface features that can be resolved are a few times larger than the actual pixel scale".MareKromiumGiu 27, 2007
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Titan-Regions-Adiri_Region-PIA08968.jpgAdiri Region68 visiteCaption NASA:"Peering through Titan's thick haze, the Cassini spacecraft glimpses boundaries between bright and dark terrain on the moon's Trailing Hemisphere.
The bright terrain at bottom is in North-Western Adiri.
North on Titan is up and rotated about 15 degrees to the right.
This view was created by combining multiple images taken using a combination of spectral filters sensitive to wavelengths of infrared light centered at 938 and 619 nanometers. Some processing artifacts remain in the finished image, including the two small, dark circles below and right of center.
The images were taken with the Cassini spacecraft narrow-angle camera on May 13, 2007 at a distance of approx. 237.000 Km (about 147.000 miles) from Titan. Image scale is roughly 3 Km per pixel. Due to scattering of light by Titan's hazy atmosphere, the sizes of surface features that can be resolved are a few times larger than the actual pixel scale".MareKromiumGiu 24, 2007
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Titan-Regions-Adiri_Region-IMG002645.jpgAdiri Region76 visiteCaption NASA:"Bright mid-latitude clouds near the bottom of this view hint at the ongoing cycling of Methane on Titan. These cloud streaks are near the same latitude as similar clouds observed above different longitudes on Titan.
The view is centered on Titan's Trailing Hemisphere, over the 1.700 Km (such as about 1050 mile) wide bright Region known as "Adiri".
North on Titan is up and rotated 15° to the right.
This view was created by combining multiple images taken using a combination of spectral filters sensitive to wavelengths of infrared light centered at 939 and 742 nanometers
The images were taken with the Cassini spacecraft wide-angle camera on May 13, 2007 at a distance of approx. 104.000 Km (about 65.000 miles) from Titan. Image scale is roughly 12 Km (about 8 miles) per pixel. Due to scattering of light by Titan's hazy atmosphere, the sizes of surface features that can be resolved are a few times larger than the actual pixel scale".MareKromiumGiu 20, 2007
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Titan-N00084796.jpgInterpreting Titan (1)56 visite"Interpretare Titano". Difficile. Molto difficile. L'osservazione visuale di quella che la NASA chiama "foggy moon" non è gratificante, a causa dell'estrema turbolenza che caratterizza l' (alta e media) atmosfera di questo Mondo. Le nuvole di sabbia (che dovrebbero apparire giallastre) si confondono con quelle formate da ghiaccio d'acqua e/o da altri elementi organici; le nebbie che coprono perpetuamente la superficie di questo misterioso ed affascinante pianeta contribuiscono ad aumentare le difficoltà a noi "Interpreti". Se a questo aggiungiamo la grande distanza dalla quale le immagini sono state ottenute e la presenza costante di artefatti, il nostro lavoro diventa quasi impossibile. Le sole certezze che abbiamo attengono la colorazione di Titano il quale, se da una certa distanza (osservazioni telescopiche terrestri ed HST incluse) appare giallo, a mano a mano che ci si avvicina sembra "cedere" il colorito giallo in favore di varie gradazioni di celeste pallido, verde chiaro e marrone chiazzato.
Molte di queste colorazioni (dal celeste pallido, al giallo/arancio, al blu), forse, sono una conseguenza dell'interazione fra la debole (ma non insignificante!) illuminazione solare e gli elementi che compongono gli strati alti dell'atmosfera di Titano; altre di queste colorazioni (i verdi, i giallo-scuri, i bianchi ed i marroni), invece, potrebbero essere proprie degli strati bassi e/o (addirittura) della superficie di questo Mondo.
E noi...Noi interpretiamo. O meglio: proviamo ad interpretare...MareKromiumGiu 16, 2007
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Titan-N00084802.jpgInterpreting Titan (2)56 visitenessun commentoMareKromiumGiu 16, 2007
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Titan-N00084809.jpgInterpreting Titan (3)58 visitenessun commentoMareKromiumGiu 16, 2007
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Titan-N00084842.jpgInterpreting Titan (4)58 visitenessun commentoMareKromiumGiu 16, 2007
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Titan-N00084850.jpgInterpreting Titan (5)58 visitenessun commentoMareKromiumGiu 16, 2007
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