| Piú votate - Saturn: the "Ringed Beauty" and His Moons |
Japetus-PIA09970.jpgJapetus57 visiteCaption NASA:"Images taken with Cassini's Ultraviolet Imaging Spectrograph shed some light on the dark side of Saturn's moon Iapetus. Scientists are trying to figure out what painted Iapetus' Dark Side. This is one of the biggest mysteries scientists are trying to answer during the upcoming Sept. 10, 2007, flyby.
The ultraviolet image on the left indicates water ice abundance across the surface: the bright North Polar Terrain (shown in red) is the iciest region in this view. Away from the Pole, as the color shifts to blue, less water ice is present in the surface.
The darkest terrain, which includes very little water ice, is shown in light blue.
The dark sky background viewed during the observation is shown as purple in this color scheme.
The ultraviolet-light image was taken during a flyby in December 2004. A visible light image taken on the same date is shown on the right for reference".MareKromium
(3 voti)
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Tethys-N00090940.jpgTethys (natural colors; elab. Lunexit)61 visiteCaption NASA:"N00090940.jpg was taken on August 29, 2007 and received on Earth August 30, 2007. The camera was pointing toward TETHYS that, at the time, was approx. 48.664 Km away, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".MareKromium
(3 voti)
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Tethys-N00090943.jpgOdysseus57 visiteCaption NASA:"N00090943.jpg was taken on August 29, 2007 and received on Earth August 30, 2007. The camera was pointing toward TETHYS that, at the time, was approx. 68.763 Km away, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".MareKromium
(3 voti)
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Tethys-N00090948.jpgOdysseus56 visiteCaption NASA:"N00090948.jpg was taken on August 29, 2007 and received on Earth August 30, 2007. The camera was pointing toward TETHYS that, at the time, was approximately 88.622 Km away, and the image was taken using the CL1 and CL2 filters.
This image has not been validated or calibrated".MareKromium
(3 voti)
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Helene-PIA09015.jpgJust like an old "apple": Helene (False Colors)58 visiteCaption NASA:"The Cassini spacecraft reveals details on the surface of small, irregularly shaped Helene in this close-up view, obtained during the Spacecraft's closest encounter with this moon during its four-year primary mission.
Helene (32 Km, or 20 miles across) is a Trojan Moon, sharing Dione's orbit but staying 60° or 400.000 Km (about 250.000 miles) ahead of the much larger moon.
The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on July 20, 2007. The view was acquired at a distance of approx. 39.000 Km (such as about 24.000 miles) from Helene and at a Sun-Helene-spacecraft, or phase, angle of 61°.
Image scale is roughly 231 meters (758 feet) per pixel".MareKromium
(3 voti)
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Janus_Prometheus-PIA08994.jpgJanus & Prometheus63 visiteCaption NASA:"The Cassini spacecraft spies two of the small, irregular moons that patrol the outer edges of Saturn's Main Rings.
Prometheus (102 Km, or approx. 63 miles across) hugs the interior of the F-Ring right of center, while Janus (181 Km, or about 113 miles across) hangs in the foreground below center. Hints of craters can be seen on Janus.
This view looks toward the unilluminated side of the Rings from less than 1° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 14, 2007 at a distance of approx. 1,6 MKM (1 MMs) from Saturn.
Image scale is roughly 10 Km (about 6 miles) per pixel".MareKromium
(3 voti)
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Dione-N00086970.jpgSpace Encounter: Dione and Prometheus (6)56 visitenessun commentoMareKromium
(3 voti)
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Dione-N00086879.jpgSpace Encounter: Dione and Prometheus (1)61 visitenessun commentoMareKromium
(3 voti)
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Dione-N00086940.jpgSpace Encounter: Dione and Prometheus (2)56 visitenessun commentoMareKromium
(3 voti)
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Dione-N00086957.jpgSpace Encounter: Dione and Prometheus (3)58 visitenessun commentoMareKromium
(3 voti)
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Dione-N00086961.jpgSpace Encounter: Dione and Prometheus (4)97 visitenessun commentoMareKromium
(3 voti)
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Dione-N00086768.jpgCrossing the Rings (1)57 visiteCaption NASA:"N00086768.jpg was taken on July 22, 2007 and received on Earth July 23, 2007. The camera was pointing toward DIONE that, at the time, was approx. 710.096 Km away.
This image was taken using the P0 and UV3 filters and it has not been validated or calibrated".MareKromium
(3 voti)
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