| Piú votate - Saturn: the "Ringed Beauty" and His Moons |
Atlas-N00084635.jpgAtlas (3)67 visitenessun commentoMareKromium
(5 voti)
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Janus-PIA08951.jpgFloating Janus58 visiteCaption NASA:"Janus floats above the meandering clouds of Saturn and a few of the large craters on the moon are just visible.
This view looks toward the unilluminated side of the Rings from about 18° above the Ring-Plane. Saturn's narrow F-Ring and outer A-Ring are pictured in the upper right.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on April 13, 2007 at a distance of approx. 1,7 MKM (a little more than 1 MMs) from Janus.
Image scale is roughly 10 Km (about 6 miles) per pixel".MareKromium
(5 voti)
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Japetus-IMG002621-cr2000.jpgJapetus' "Bright Side" (natural colors - elab. Lunexit)81 visitenessun commentoMareKromium
(5 voti)
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Japetus-IMG002621-br500.jpgJapetus' "Bright Side" (natural colors - elab. NASA)57 visiteCaption NASA:"The Cassini spacecraft views terrain on the bright, Trailing Side of Iapetus in natural color. This side of Iapetus starkly contrasts with the much darker Leading Hemisphere, and some of the dark material seen here in association with craters near the Terminator is an extension of the Leading Hemisphere terrain.
This Region was previously imaged by the spacecraft at a much finer resolution - a spatial scale of less than 1 Km (0,6 miles) per pixel - during a Fly-By at the close of 2004. This terrain was then on the moon's night side at the time, and Cassini imaged it using weak, reflected light from Saturn.
The present view looks toward Iapetus (1468 Km or approx. 912 miles across) from about 24° above the moon's Equator.
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 15, 2007 at a distance of approx. 2,3 MKM (such as about 1,4 MMs) from Iapetus and at a Sun-Iapetus-spacecraft, or phase, angle of 66°.
Scale in the original images is roughly 13 Km (about 8 miles) per pixel.
The view has been magnified by a factor of three".
MareKromium
(5 voti)
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Enceladus-PIA09209.jpgWarm-up on Enceladus58 visiteCaption NASA:"Plumes of water vapor and other gases escape at high velocity from the surface of Saturn's moon Enceladus, as shown in this artist concept.
The "shear heating" mechanism suggests that tidal forces acting on fault lines in the moon's icy shell cause the sides of the faults to rub back and forth against each other, producing enough heat to transform some of the ice into plumes of water vapor and ice crystals. Cold sub-surface ice (blue) becomes much warmer near the active fractures from which the plumes emanate.
Movement along the fault lines may be about half a meter (20") over the course of the 1,37-day tidal period of Enceladus around Saturn".MareKromium
(5 voti)
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Dione-N00083791.jpgDione (b/w)56 visiteCaption NASA:"N00083791.jpg was taken on May 27, 2007 and received on Earth May 28, 2007.
The camera was pointing toward DIONE that, at the time, was approx. 846.342 Km away, and the image was taken using the CL1 and IR3 filters.
This image has not been validated or calibrated".MareKromium
(5 voti)
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Rhea-N00083837.jpgRhea (b/w)108 visitenessun commentoMareKromium
(5 voti)
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Atlas_Pan-PIA08946.jpgBrothers in the Night: Atlas & Pan56 visiteCaption NASA:"Atlas and Pan emerge from the Far Side of Saturn.
Light passing through the upper reaches of the Planet's Atmosphere is refracted, or bent, distorting the image of the Rings beyond.
Pan (about 26 Km, or 16 miles across) is seen within the Encke Gap. Atlas (about 32 Km, or 20 miles across) orbits just beyond the outer edge of Saturn's A-Ring.
This view looks toward the unilluminated side of the Rings from about 12° above the Ring-Plane. Shadows cast by the Rings arc across the Planet toward the Cassini spacecraft.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on April 12, 2007 at a distance of approx. 1,6 MKM (about 1 MMs) from Saturn.
Image scale is roughly 10 Km (a little more than 6 miles) per pixel".MareKromium
(5 voti)
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Saturn-PIA08944-01.jpgPrometheus Makes Contact (natural colors - elab. Lunexit)57 visitenessun commentoMareKromium
(5 voti)
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Saturn-PIA08942.jpgDeep Blue (IR view of the Rings)56 visiteThe Cassini spacecraft surveys Saturn's outstretched Ring System in the infrared from a vantage point high above the Planet's Northern Latitudes. Nearly the full expanse of the main rings is visible here -- from the C-Ring to the outer edge of the A-Ring (in the upper left corner).
Ring shadows are visible on the planet at lower left, and two large storms swirl near center.
This view looks toward the unilluminated side of the Rings from about 52° above the Ring-Plane.
The image was taken with the Cassini spacecraft wide-angle camera using a combination of spectral filters sensitive to wavelengths of infrared light centered at 752 (red channel), 890 (blue channel) and 728 (green channel) nanometers.
The view was acquired on April 5, 2007 at a distance of approx. 1,4 MKM (about 900.000 miles) from Saturn. Image scale is roughly 81 Km (approx. 51 miles) per pixel.MareKromium
(5 voti)
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Dione-N00081707.jpgDione in black & white58 visitenessun commentoMareKromium
(5 voti)
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Enceladus-N00081663.jpgFountains in the Darkness (2) - natural colors, elab. Lunexit73 visiteCaption NASA:"N00081663.jpg was taken on April 24, 2007 and received on Earth April 25, 2007.
The camera was pointing toward ENCELADUS that, at the time, was approx. 189.309 Km away, and the image was taken using the CL1 and CL2 filters.
This image has not been validated or calibrated".MareKromium
(5 voti)
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