| Ultimi arrivi - Saturn: the "Ringed Beauty" and His Moons |
The_Rings-PIA08905.jpgClumps in the F-Ring56 visiteCaption NASA:"The brilliant core of the F-Ring displays a breakaway clump of material, possibly related to the other objects the Cassini spacecraft has witnessed in this dynamic Ring in the past few years of observations.
This view looks toward the unlit side of the Rings from about 58° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 10, 2007 at a distance of approx. 1,7 MKM (1,1 MMs) from Saturn.
Image scale is roughly 10 Km (about 6 miles) per pixel".MareKromiumMar 27, 2007
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Enceladus.jpgEnceladus, the "E-Ring Creator"...56 visiteCaption NASA:"The active moon Enceladus appears to be making Saturn's E-Ring. An amazing picture showing the moon at work was taken late last year (AD 2006) by the Saturn-orbiting Cassini spacecraft and is shown above. Enceladus is the bright point near the center, right near the center of Saturn's E-Ring. Streams of ice and water vapor can be seen pouring off Enceladus into the E-Ring.
The above bright image of the normally faint E-Ring was made possible by aligning Cassini so that Saturn blocked the Sun. From that perspective, small ring particles reflect incoming sunlight more efficiently. Cassini has now been orbiting Saturn for almost three years, and is scheduled to swoop by the unexpectedly cryovolcanic Enceladus at least several more times".MareKromiumMar 27, 2007
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Hyperion-PIA08904.jpgPumice-Hyperion (natural colors - elab. Lunexit)58 visiteCaption NASA:"Chaotically tumbling and seriously eroded by impacts, Hyperion is one of Saturn's more unusual satellites. Scientists believe the moon to be quite porous, with a great deal of its volume being empty space.
(...) Only part of the moon is visible in this image, the rest being hidden in shadow.
The image was taken with the Cassini spacecraft narrow-angle camera using a spectral filter sensitive to wavelengths of infrared light centered at 930 nanometers. The view was acquired on Feb. 15, 2007 from a distance of approx. 224.000 Km (such as about 139.000 miles) from Hyperion.
Image scale is roughly 1 Km (4.404 feet) per pixel". Mar 27, 2007
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The_Rings-PIA08903.jpgF-Ring or just "Saturnian Neon-Lights"?...57 visiteCaption NASA:"Bright strands in Saturn's ever changing F-Ring emerge from the Planet's shadow. The F-Ring usually has a single bright core, about 50 Km (31 miles) across, but the section of the ring seen here appears to have a second bright strand.
Several background stars are visible by the trails they created while the image was being exposed.
This view looks toward the unlit side of the Rings from about 59° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 9, 2007 at a distance of approx. 1,7 MKM (about 1,1 MMs) from Saturn.
Image scale is roughly 10 Km (about 6 miles) per pixel".Mar 24, 2007
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Saturn-HST.jpgMoments of the "Lord of the Rings"58 visitenessun commentoMar 22, 2007
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The_Rings-PIA08901.jpgThe "Cassini Division"58 visiteCaption NASA:"The Cassini Division appears to emerge out of Saturn's shadow in this Cassini spacecraft image. This Division between the A and B Rings, visible through modest telescopes from Earth, actually contains five dim bands of ring material, here seen near the left side of the image between two small dark gaps.
This detailed view also displays a great deal of structure in the B-Ring, left of the Division. The Cassini Division is 4800 Km (2980 miles) wide. This view looks toward the unlit side of the Rings from about 59° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 9, 2007 at a distance of approx. 1,7 MKM (about 1,1 MMs) from Saturn.
Image scale is roughly 10 Km (about 6 miles) per pixel".Mar 21, 2007
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The_Rings-PIA08900.jpgThe "beginnings" of the Rings58 visiteCaption NASA:"High above the streamers of cloud in Saturn's atmosphere the Planet's immense Ring System begins with faint, thin rings populated with dust-sized ice particles. Here, features in the D-Ring are visible, beginning at about 67.000 Km (approx. 42.000 miles) from the Planet's center.
Stars trail across the background during this exposure, timed to capture the faint light from these D-Ring features.
This view looks toward the unlit side of the Rings, from about 59° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 9, 2007 at a distance of approx. 1,7 MKM (1,1 MMs) from Saturn.
Image scale is roughly 10 Km (about 6 miles) per pixel".Mar 21, 2007
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Helene_Mimas-PIA08897.jpgCelestial Wonders around Saturn: Helene and Mimas59 visiteCaption NASA:"Mimas (397 Km, or 247 miles across) is seen here just before gliding in front of Helene (32 Km, or 20 miles across), which lays about 192.000 Km (approx. 119.000 miles) in the distance beyond the larger moon.
The limb of Mimas is flattened in the West, where the rim if the large crater Herschel lies.
This view looks toward the lit side of the Rings from about 3° below the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 3, 2007 at a distance of approx. 1,3 MKM (about 800.000 miles) from Mimas and 1,5 MKM (approx. 1 MMs) from Helene.
Image scale is roughly 8 Km (approx. 5 miles) per pixel on Mimas and 9 Km (about 6 miles) per pixel on Helene". Mar 16, 2007
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Saturn-PIA08896.jpgThe Southern Latitudes and the South Pole of Saturn (Extremely Enhanced Natural Colors - elab. Lunexit)57 visiteCaption NASA:"Rippling with detail, the Southern Hemisphere of Saturn comes to life in this view from the Cassini spacecraft. Long, flowing streamers and bands of great contrast soften toward the Pole, where a great hurricane-like storm resides.
The image was taken with the Cassini spacecraft wide-angle camera using a spectral filter sensitive to wavelengths of infrared light centered at 890 nanometers.
The image was taken on Feb. 1, 2007 at a distance of approx. 945.000 Km (about 587.000 miles) from Saturn.
Image scale is roughly 53 Km (approx. 33 miles) per pixel".Mar 14, 2007
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Streak-W00026015~0.jpgA new "Streak" in the Sky of Saturn (digitally - but only partially - cleaned-up)57 visitenessun commentoMar 09, 2007
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Saturn-PIA08890.jpgClouds & Clouds57 visiteCaption NASA:"Bright equatorial clouds give way to darker southern bands in this infrared Cassini spacecraft view taken with a filter sensitive to methane absorption in Saturn's Atmosphere.
Delicate shadows cast onto the Planet by its Inner Rings are visible at upper right.
A portion of the same Inner Rings are seen at lower right.
The image was taken with the Cassini spacecraft wide-angle camera using a combination of spectral filters sensitive to wavelengths of polarized infrared light.
The view was acquired on Jan. 14, 2007 at a distance of approx. 976.000 Km (about 606.000 miles) from Saturn.
Image scale is roughly 55 Km (about 34 miles) per pixel".Mar 09, 2007
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Streak-W00026015.jpgA new "Streak" in the Sky of Saturn (original NASA image)62 visiteCaption NASA:"W00026015.jpg was taken on March 06, 2007 and received on Earth March 07, 2007. The camera was pointing toward Saturn-Rings that, at the time, were approx. 808.714 Km away.
The image was taken using the CL1 and VIO filters and has not been validated or calibrated".
Nota: volevamo commentare, ma...è fiato sprecato. Qualunque ipotesi facessimo, dalla più logica e razionale (tipo: "è una luna di Saturno che è venuta "mossa), alla più esotica (tipo: dato che le stelle sullo sfondo sono - quasi - puntiformi, si può dedurre che lo Streak rapprsenta un oggetto luminoso che SI STAVA MUOVENDO MOLTO RAPIDAMENTE rispetto a Cassini), sarebbero comunque ipotesi inutili, in quanto non sostanziabili.
Dunque...decidete Voi che cosa Vi piace immaginare di più!Mar 09, 2007
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