| Piú viste - Saturn: the "Ringed Beauty" and His Moons |
Rhea-N00063370.jpgRhea and the Rings57 visiteCaption originale:"N00063370.jpg was taken on July 01, 2006 and received on Earth July 01, 2006. The camera was pointing toward Rhea that, at the time, was approximately 1.170.687 Km away.
The image was taken using the RED and CL2 filters".
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Rhea-N00063467.jpgVoyagers... (1)57 visiteDue frames che ritraggono Rhea e, molto probabilmente, Tethys (ma non ne siamo affatto certi), mentre si "rincorrono" attraverso lo Spazio di Saturno.
Frames bellissimi e suggestivi che ci aiutano, se non altro, ad immaginare che cosa vuol dire "vivere" in uno Spazio popolato non da una sola Luna, ma da decine di Corpi Celesti che si rincorrono e si incrociano in una sorta di Carosello senza fine.
Caption originale:"N00063467.jpg was taken on July 04, 2006 and received on Earth July 04, 2006. The camera was pointing toward Rhea that, at the time, was approximately 1.358.319 Km away. The image was taken using the CL1 and CL2 filters".
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Enceladus&C-PIA08216.jpgJewels...57 visiteThe real jewels of Saturn are arguably its stunning collection of icy moons. Seen here with the unlit side of the Rings are Titan (Dx), Tethys (Sx) and Enceladus (Cn) with its fountain-like geysers.
The faint, vertical banding in the image is due to "noise" in the spacecraft electronics. This noise is difficult to remove from an image that has a very wide dynamic range - i.e.: a wide range of brightness levels - as in the difference between gleaming Titan and the faint plumes of Enceladus.
Additionally, a reflection of Titan's light within the camera optics is likely responsible for the faint secondary image of Titan's limb to the left of the giant moon.
The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on June 10, 2006 at a distance of approx. 3,9 MKM (about 2,4 MMs) from Enceladus; 5,3 MKM (about 3,3 MMs) from Titan and 4,4 MKM (such as approx. 2,7 MMs) from Tethys.
The phase angle is 160° on Enceladus.
Image scale is 23 kilometers (14 miles) per pixel on Enceladus, 32 kilometers (20 miles) per pixel on Titan and 26 kilometers (16 miles) per pixel on Tethys.
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Rhea-N00064799-A.jpgMoments of Rhea (1) - context image57 visitenessun commento
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Saturn-W00018094.jpgOverexposed F-Ring, a few Stars and some Image-Artifacts57 visitenessun commento
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Earth-PIA08324-2.jpgEarth, from Saturn's Space (2)57 visiteThis magnified view of the image taken through the clear filter (monochrome) shows the Moon as a dim protrusion to the upper left of Earth. Seen from the Outer Solar System through Cassini's cameras, the entire expanse of direct human experience, so far, is nothing more than a few pixels across. Earth no longer holds the distinction of being our Solar System's only "water world", as several other bodies suggest the possibility that they too harbor liquid water beneath their surfaces. The Saturnian moon, Enceladus, is among them, and is also captured on the left in this image, with its plume of water ice particles and swathed in the blue E-Ring which it creates. Delicate fingers of material extend from the active moon into the E-Ring. The narrow and tenuous G-Ring and the Main Rings are seen at the right. The view looks down from about 15° above the un-illuminated side of the Rings.
Images taken using red, green and blue spectral filters were combined to create this view. The image was taken by the Cassini spacecraft wide-angle camera on Sept. 15, 2006, at a distance of approx. 2,1 MKM (about 1,3 MMs) from Saturn and at a sun-Saturn-spacecraft angle of almost 179°.
Image scale is roughly 129 Km (about 80 miles) per pixel.
At this time, Cassini was nearly 1,5 BKM (about 930 MMs) from Earth.
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Saturn-W00018153.jpgSunshine on Saturn...57 visitenessun commento
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Saturn-W00019554.jpgA "Slice" of Light...57 visiteCaption NASA:"W00019554.jpg was taken on November 06, 2006 and received on Earth November 06, 2006. The camera was pointing toward Saturn that, at the time, was approximately 1.284.897 Km away.
The image was taken using the CB2 and IRP90 filters and it has not been validated or calibrated".
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Enceladus-PIA08354.jpgEnceladus (in false colors)57 visiteThe mosaic shows the anti-Saturnian Hemisphere of Enceladus -- the side that always faces away from Saturn.
This Region contains a number of tectonic and impact features and shows how these two geologic forces interact on Enceladus. The center left portion of this mosaic is dominated by Diyar Planitia.
Like Sarandib Planitia observed in the previous Enceladus flyby, the Region is characterized by low ridges and troughs. Throughout this Hemisphere, fractures of all sizes disrupt the previously existing cratered terrain and even the comparatively youthful Diyar Planitia.
Many of the younger fractures have blue-green walls, revealing coarse-grained water ice in the top layers of Enceladus' lithosphere, compared to the fine-grained ice that coats much of Enceladus' surface. The blue-green color is very similar to the coatings surrounding the South Polar "tiger stripes" (these appear greener than the features in the south polar mosaic released in 2005 due to the use of clear-filter images, instead of green, in that mosaic).
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Rhea-N00075318.jpgRhea (natural colors)57 visitenessun commentoMareKromium
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Saturn-W00018153.jpgSunshine on Saturn... (natural colors)57 visitenessun commentoMareKromium
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Mimas-N00077786.jpgOccultation? (5)57 visiteCaption NASA:"(...) The camera was pointing toward Mimas that, at the time, was at approximately 1.344.677 Km away, and the image was taken using the CL1 and CL2 filters (...)".
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