| Ultimi arrivi - Titan: The "Foggy" Moon |
Titan-PIA08219.jpgTitan through the Rings54 visiteCaption NASA originale:"Titan shines beyond the Rings like a brilliant ring of fire, its light gleaming here and there through the gaps in Saturn's magnificent plane of ice. Titan is surrounded by a thick photochemical haze which scatters the Sun's light.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 11, 2006 at a distance of approx. 5,3 MKM (about 3,3 MMs) from Titan and at a Sun-Titan-spacecraft, or phase, angle of 158°. Image scale is roughly 32 Km (about 20 miles) per pixel on Titan".Lug 14, 2006
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Titan-PIA08221.jpgWhen Giants meet...55 visiteCaption NASA originale:"Saturn's two largest moons meet in the sky in a rare embrace. Smog-enshrouded Titan (5.150 Km, or 3,200 miles across) glows to the left of airless Rhea (1.528 Km, or 949 miles across).
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 11, 2006 at a distance of approx. 3,6 MKM (about 2,2 MMs) from Rhea and 5,3 MKM (about 3,3 MMs) from Titan.
The Sun-Rhea-spacecraft, or phase, angle is 157° on Rhea.
Image scale is about 22 Km (approx. 13 miles) per pixel on Rhea and 32 Km (approx. 20 miles) per pixel on Titan".Lug 14, 2006
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Titan-PIA08214.jpgHaze and saturation55 visiteCaption NASA originale:"Sunlight streams through the high-altitude haze layer that extends completely around the giant moon, Titan, in this view of the moon taken by the Cassini spacecraft. Some fine structure can be spotted in the ever-shifting hazes in Titan's Northern Polar reaches to the top.
The distant sky beyond Titan is not empty, but instead is filled in the lower half by the barely visible, immense bulk of Saturn, 1,3 MKM (such as approx. 800.000 miles) beyond. The view is toward the night side of both worlds.
Titan's image is saturated, or over exposed, near the five o'clock position, obscuring the details in the atmosphere.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 2, 2006 at a distance of approx. 2,3 MKM (about 1,4 MMs) from Titan and at a Sun-Titan-spacecraft angle of 163°. Image scale is roughly 14 Km (about 9 miles) per pixel on Titan".Lug 05, 2006
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Titan-PIA08211.jpgIn the lights: Titan, Janus and the Rings...64 visiteCaption NASA:"Dazzling Titan glows with a 360° Sunset as light scatters through its very extended atmosphere. Some structure is visible in the hazes of the Northern Polar Hood.
To the left is Janus (181 Km, or 113 miles across), far off on the opposite side of the Ring-Plane. The Rings show their unlit side to Cassini, as the spacecraft viewed them from slightly above the ringplane.
A world with strikingly Earth-like physical processes, frigid Titan is Saturn's largest natural satellite, at 5.150 Km (about 3.200 miles) across. Titan's image is saturated (cosiddetto "effetto goccia di luce") at the 5 o'clock position.
The view was acquired in visible light with the Cassini spacecraft narrow-angle camera on June 2, 2006 at a distance of approx. 2,3 MKM (such as about 1,5 MMs) from Titan and at a Sun-Titan-spacecraft, or phase, angle of 163°. Cassini was 3,7 MKM (about 2,3 MMs) from Janus. Image scale is roughly 14 Km (about 9 miles) per pixel on Titan and approx. 22 Km (about 14 miles) on Janus".Giu 30, 2006
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Titan_and_Rhea-N00062452.jpgObscuring the Sun...56 visiteCaption originale:"N00062452.jpg was taken on June 11, 2006 and received on Earth June 12, 2006. The camera was pointing toward Rhea that, at the time, was approximately 3.619.486 Km away.
The image was taken using the CL1 and CL2 filters".Giu 13, 2006
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Titan_and_Rhea-N00062458.jpgObscuring the Sun...56 visiteCaption originale:"N00062458.jpg was taken on June 11, 2006 and received on Earth June 12, 2006. The camera was pointing toward Rhea that, at the time, was approximately 3.617.336 Km away.
The image was taken using the CL1 and CL2 filters".Giu 13, 2006
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Titan_and_Saturn-PIA08196.jpgFather and Son55 visiteCaption originale:"Cassini's Eyes - such as its powerful imaging cameras -- bear witness to the majestic and spectacular sights of the Saturn System, as this views attests. Here, the probe gazes upon Titan in the distance beyond Saturn and its dark and graceful Rings.
This view was taken from above the Ring-Plane and looks toward the unlit side of the Rings.
The image was taken using a spectral filter sensitive to wavelengths of infrared light centered at 938 nnmts.
The image was obtained using the Cassini spacecraft narrow-angle camera on May 10, 2006 at a distance of approx. 2,9 MKM (such as about 1,8 MMs) from Saturn and 4,1 MKM (about 2,6 MMs) from Titan.
The image was taken at a phase angle of 149°.
Image scale is about 17 Km (roughly 11 miles) per pixel on Saturn".Giu 10, 2006
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Titan-PIA08188.jpgMellow Yellow...65 visiteCaption NASA originale:"Saturn's largest moon, Titan, peaks out from under the Planet's Rings of ice.
This view looks toward Titan from slightly beneath the Ring-Plane. The dark Encke Gap (325 Km, or 200 miles wide) is visible here, as is the narrow F-Ring.
Images taken using red, green and blue spectral filters were combined to create this natural color view.
The images were taken with the Cassini spacecraft narrow-angle camera on April 28, 2006 at a distance of approximately 1,8 MKM (such as 1,1 MMs) from Titan. Image scale is approx. 11 Km (about 7 miles) per pixel on Titan".Mag 30, 2006
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Titan-Rivers-Unnamed_Rivers_and_Channels-PIA08428-0.jpgThe rivers of Titan...59 visiteThis image from the Synthetic Aperture Radar instrument on the Cassini spacecraft shows the radar-bright western margin of Xanadu, one of the most prominent features on Titan.
In radar images, bright regions indicate a rough or scattering material, while a dark region might be smoother or more absorbing. This image was taken during a flyby of Titan on April 30, 2006.
Narrow, sinuous, radar-bright channels, meandering like a maze, are seen on the right-hand-side of the image. These may be river networks that might have flowed onto the dark areas on the left of the image. Vast, dark areas covered by dunes are seen on the equatorial regions of Titan (see PIA03567) and have been referred to as Titan's "sand seas". Near the middle of the image is a radar-bright area that has a boundary with the dark sand seas. Because the radar illumination is coming from the top, this indicates that the bright region, Xanadu, is topographically higher than the sand seas.Mag 06, 2006
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Titan-Atmosphere.jpgAtmospheres...55 visitenessun commentoMag 06, 2006
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Titan-Dunes-IMG002116-br500.jpgThe Dunes of Titan and the Namibian Dunes55 visiteCassini radar sees sand dunes on Saturn's giant moon Titan (upper photo) that are sculpted like Namibian sand dunes on Earth (lower photo). The bright features in the upper radar photo are not clouds but topographic features among the dunes.Mag 05, 2006
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Titan-Craters-Guabonito_Crater-PIA08425.jpgGuabonito Crater66 visiteThis image of Saturn's moon Titan from the Synthetic Aperture Radar Instrument on the Cassini spacecraft shows the South-Western area of a feature called Xanadu (bottom right of the image). The area is bright because it reflects the radio wavelengths used to make this radar images and this image was taken on April 30, 2006. Xanadu is one of the most prominent features on Titan and was first seen in ground-based observations. The origin of Xanadu is still unknown, but this radar image reveals details previously unseen, such as numerous curvy features that may indicate fluid flows. Linear dark streaks visible in radar-dark areas are dune fields, also seen in previous radar images.
Near the center of the image is a prominent circular feature, named Guabonito, about 90 Km (about 56 miles) in diameter. It might be an impact crater or a cryovolcanic caldera. If this is an impact structure, the absence of an ejecta blanket suggests that the feature has been highly eroded, like some impact structures on Earth, or has been buried by the dune fields. Other radar-bright areas (top left and top right) appear to be topographically high and might act as obstacles, diverting the dunes around them".Mag 05, 2006
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