| Risultati della ricerca nelle immagini - "D-Ring" |
Saturn-PIA07568.jpgThe "dusty" D-Ring of Saturn58 visiteOriginal caption:"This close-up view is Cassini's best look yet at Saturn's tenuous innermost D-Ring. The narrow ringlet visible here is named D68 and is the innermost discrete feature in the D-Ring.
This image also clearly shows how the diffuse component of the D-Ring tapers off as it approaches the Planet.
The view is looking down on the dark side of the Rings, with the Planet's lower half being illuminated by reflected light from the Rings. The upper half of the Planet is also dark. The image was taken at a high phase angle - such as the Sun-Saturn-spacecraft angle - such as 177°. Viewing the Rings at high phase angle makes the finest dusty particles visible.
The inner edge of the C-Ring enters the scene at the lower left and Saturn's shadow cuts off the view of the Rings. Several background stars can also be seen here.
The image was taken in visible light with the Cassini spacecraft wide-angle camera on July 15, 2005, at a distance of approx. 293.000 Km from Saturn".
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The_Rings-PIA08900.jpgThe "beginnings" of the Rings56 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".
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The_Rings-PIA08990.jpgStartrails through the D-Ring56 visiteCaption NASA:"Faint features in Saturn's innermost ring, the D-Ring, are brought into view in this strongly contrast-enhanced Cassini image. A few background stars are visible through the sheer ring as squiggly star trails.
The inner region of the C-Ring is seen at upper left. The faint diagonal wedge shape on the left side of the image was caused by stray light in the camera optics. The view looks toward the sunlit side of the Rings from about 18° below the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 12, 2007 at a distance of approx. 238.000 Km (about 148.000 miles) from Saturn.
Image scale is roughly 1 Km (0,6 miles) per pixel".MareKromium
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