| Ultimi arrivi - Saturn: the "Ringed Beauty" and His Moons |
Dione-PIA07692.jpgClosing-up on Dione58 visiteCaption originale:"This close-up of Dione's icy surface shows deeply shadowed craters near the Terminator, as well as a group of roughly linear faults above center.
The terrain shown here is on the moon's Leading Hemisphere. North on Dione is up and tilted 21° to the right.
The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on Dec. 24, 2005 at a distance of approximately 152.000 Km (about 94.000 miles) from Dione and at a phase angle of 109°. Resolution in the original image was about 904 mt (roughly 2.965 feet) per pixel. The image has been magnified by a factor of two and contrast-enhanced to aid visibility".Feb 04, 2006
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Tehys-PIA07693.jpgOdysseus62 visiteOriginal caption:"Plunging cliffs and towering mountains characterize the gigantic impact structure called Odysseus on Saturn's moon Tethys. The great impact basin lies before the Cassini spacecraft in one of the best views yet obtained.
Quite a few small craters are visible inside Odysseus (450 Km - or 280 miles across), making it clear that this is not a very young structure. However, a comparison of cratering density between the interior of Odysseus and the surrounding terrain should show whether the large basin is at least relatively young.
Odysseus lies on the Leading Hemisphere of Tethys; North is up and rotated 18° to the right.
The image was taken in polarized ultraviolet light with the Cassini spacecraft narrow-angle camera on Dec. 24, 2005 at a distance of approx. 196.000 Km (about 122.000 miles) from Tethys and at a Sun-Tethys-spacecraft, or phase, angle of 85°. Resolution in the original image was about 1 Km (3,831 feet) per pixel. The image has been magnified by a factor of two and contrast-enhanced to aid visibility".Feb 03, 2006
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Rhea-N00049536.jpgRhea and Companions (1)58 visiteCaption originale:"N00049536.jpg was taken on January 27, 2006 and received on Earth January 29, 2006. The camera was pointing toward Rhea that, at the time, was approximately 3.011.853 Km away, and the image was taken using the CL1 and CL2 filters".Feb 03, 2006
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Rhea-N00049540.jpgRhea and Companions (2)57 visiteOriginal caption:"N00049540.jpg was taken on January 27, 2006 and received on Earth January 29, 2006. The camera was pointing toward Rhea that, at the time, was approximately 3.012.654 Km away, and the image was taken using the CL1 and CL2 filters".Feb 03, 2006
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Dione-PIA07691.jpgDione's faulted surface (HR - enhanced colors)58 visiteCaption originale:"(...) To create this enhanced-color view, ultraviolet, green and infrared images were combined into a single black and white picture that isolates and maps regional color differences. This "color map" was then superposed over a clear-filter image.
The origin of the color differences is not yet understood, but may be caused by subtle differences in the surface composition or the sizes of grains making up the icy soil.
Even this view looks toward the Leading Hemisphere on Dione. North is up and rotated 20° to the right.
All the images were acquired with the Cassini spacecraft narrow-angle camera on Dec. 24, 2005 at a distance of approximately 151.000 Km(about 94.000 miles) from Dione and at a phase angle of 99°.
Image scale is approx. 896 mt (about 2.940 feet) per pixel".Feb 01, 2006
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Dione-PIA07690.jpgDione's faulted surface (HR)61 visiteCaption originale"This view highlights tectonic faults and craters on Dione, an icy world that has undoubtedly experienced geologic activity since its formation.
This view looks toward the Leading Hemisphere on Dione (which is about 1.126 Km - or 700 miles - across). North is up and rotated 20° to the right.
The image was taken with the Cassini spacecraft narrow-angle camera on Dec. 24, 2005 at a distance of approximately 151.000 Km (roughly 94.000 miles) from Dione and at a phase angle of 99°. Image scale is approx. 896 mt (about 2.940 feet) per pixel".
Feb 01, 2006
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Rhea-PIA07689.jpgRhea59 visiteOriginal caption:"Scarred and battered Rhea fills the Cassini spacecraft's view. Notable here is the sharp relief of steep crater walls near the terminator.
Icy Rhea (1.528 Km --> 949 miles across) is Saturn's second-largest moon. This view shows terrain on Rhea's Trailing Hemisphere. North is up and rotated 22° to the left.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Dec. 24, 2005 at a distance of approximately 267.000 Km (such as 166.000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 59°. Image scale is 2 Km per pixel".Gen 31, 2006
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Saturn~0.jpgSaturn...from France59 visitePresently at opposition in planet Earth's sky, Saturn is well placed for telescopic observations. On Wednesday (Jan., 25, 2006) two Amateur Astronomers took full advantage of the situation from Melun, near Paris, France. With a 12" diameter telescope and web cam they recorded this sharp image of the ringed gas giant and made an exciting discovery: a new storm on Saturn. The storm appears as the white spot visible here in Saturn's Southern Hemisphere (bottom of the picture). In particular, the storm seems to correspond with an outburst of radio noise detected by the Cassini spacecraft. The phenomenon is likely similar to the Dragon Storm recorded by Cassini's instruments early last year. That storm is thought to be analogous to a terrestrial thunderstorm, with radio noise produced in high-voltage lightning discharges.Gen 27, 2006
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Rhea-PIA07686.jpgRhea (enhanced but real colors) from about 341.000 Km58 visiteOriginal caption:"This close view of Rhea prominently shows two large impact basins on the ancient and battered moon. The great age of these basins is suggested by the large number of smaller craters that are overprinted within them.
Terrain visible in this view is on the side of Rhea that faces away from Saturn. North on Rhea is up and tilted 30° to the left. This enhanced color view was created by combining images taken using filters sensitive to ultraviolet, visible green and infrared light.
The images were taken with the Cassini spacecraft narrow-angle camera on Dec. 23, 2005, at a distance of approximately 341.000 Km (approx. 212.000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 42°. The image scale is approx. 2 Km (a little more than 1 mile) per pixel". Gen 27, 2006
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Japetus-N00049173.jpgTwo-faced Japetus56 visiteOriginal caption:"N00049173.jpg was taken on January 24, 2006 and received on Earth January 25, 2006. The camera was pointing toward Japetus that, at the time, was approximately 954.836 Km away.
The image was taken using the CL1 and CL2 filters".Gen 26, 2006
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Epimetheus-PIA07680.jpgSinking in a Sea of Darkness...58 visiteThe Cassini spacecraft captured this glimpse of icy Epimetheus just before the small moon disappeared behind the bulk of Saturn's atmosphere.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Dec. 20, 2005, at a distance of approx. 2,3 MKM (about 1,4 MMs) from Epimetheus and 2,2 MKM (about 1,3 MMs) from Saturn. The image scale is roughly 14 Km (about 9 miles) per pixel on Epimetheus and approx. 13 Km (about 8 miles) per pixel on Saturn.
Gen 24, 2006
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Dione-N00048466.jpgSaturnshine over Dione57 visitenessun commentoGen 23, 2006
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