Saturn: the "Ringed Beauty" and His Moons
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Dione from appx. 1.400.000.jpgDione from Cassini-Huygens - app.x 1.400.000 Km away55 visitenessun commento
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Dione in 3D.gifDione in 3D53 visitenessun commento
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Dione&Co.-PIA07628.jpgDione, Tethys and Pandora52 visiteOriginal caption:"This excellent grouping of 3 moons - Dione, Tethys and Pandora - near the Rings, provides a sampling of the diversity of worlds that exists in Saturn's Realm. A 330-Km-wide (about 205 miles) impact basin can be seen near the bottom right on Dione (at left). Ithaca Chasma and the Region imaged during the Cassini spacecrafts Sept. 24, 2005, flyby can be seen on Tethys (middle). Little Pandora makes a good showing here as well, displaying a hint of surface detail. Tethys is on the far side of the Rings in this view; Dione and Pandora are much nearer to the Cassini spacecraft.
Rememeber that Dione is approx. 1.126 Km (about 700 miles) across. Tethys is approx. 1.071 Km (about 665 miles) across and Pandora is 84 Km (roughly 52 miles) across.
This image was taken in visible blue light with the Cassini spacecraft narrow-angle camera on Sept. 22, 2005, at a distance of approx. 1,2 MKM (about 800.000 miles) from Saturn. The image scale is about 5 Km (approx. 3 miles) per pixel on Dione and Pandora and 9 kilometers (6 miles) per pixel on Tethys".
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Dione&Co.-PIA07679.jpgProportions, dimensions, perspectives and distances...52 visiteOriginal caption:" Two of Saturn's battered, icy companions hover here, above the Ring-Plane.
To get a sense of the three-dimensional nature of the scene, note that the wide band of visible Rings is in between the two moons in this view from the Cassini spacecraft.
Mimas (397 Km, or 247 miles across, at left) is outside the far side of the Rings while Dione (1.126 Km, or 700 miles across) is outside the Rings and closer to Cassini.
The view is from just beneath the Ring-Plane and the image was taken in visible light, with the Cassini spacecraft narrow-angle camera on Dec. 18, 2005, at a distance of approx. 2,2 MKM (roughly 1,4 MMs) from Dione and 2,7 MKM (about 1,7 MMs) from Mimas. The image scale is 13 Km (about 8 miles) per pixel on Dione and 16 Km (about 10 miles) per pixel on Mimas".
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Dione&Janus-PIA08158.jpgSaturn, Dione and Janus52 visiteCaption originale:"The Cassini spacecraft looks toward the Saturnian horizon as Dione and Janus glide past.
A few craters are visible on Dione, while Janus is slightly blurred due to its motion during the exposure. The Rings appear essentially edge-on in this view, as the Cassini spacecraft continues its recent activities close to the Ring-Plane.
The image was taken with the Cassini spacecraft narrow-angle camera on March 10, 2006, using a filter sensitive to wavelengths of infrared light centered at 750 nnmts. The image was acquired at a distance of approx. 2,9 MKM (about 1,8 MMs) from Saturn.
The image scale is approx. 17 Km (roughly 11 miles) per pixel".
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Dione&Tethys-PIA06629.jpgDione and Tethys52 visiteCaption NASA originale:"Cassini offers this lovely comparison between two of Saturn's satellites, Dione and Tethys, which are similar in size but have very different surfaces.
Extensive systems of bright fractures carve the surface of Dione. The double-pronged feature Carthage Linea points toward the crater Turnus at the nine o'clock position near the terminator and Palatine Linea runs toward the moon's bottom limb near the five o'clock position.
In contrast, the surface of Tethys appears brighter and more heavily cratered. The large crater Penelope is near the eastern limb. The huge rift zone Ithaca Chasma, which is 3 to 5 Km deep and extends for about 2.000 Km from north to south across Tethys, is hidden in shadow just beyond the terminator. For comparison, the Grand Canyon in Arizona is about 1,5 Km deep and about 450 Km long.
The image was taken in visible light from a distance of approx. 1,5 MKM from Tethys and 1,6 MKM from Dione. The image scale is 9 Km/pixel on Tethys and 10 Km/pixel on Dione".
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Dione&Tethys-PIA07630.jpgThe Eternal Companions52 visiteOriginal caption:"The moons Dione and Tethys face each other across the gulf of Saturn's Rings. Here, the Cassini spacecraft looks on the Saturn-facing Hemisphere of Tethys below and the anti-Saturn side of Dione above. The dark groove in the Rings is the Cassini Division.
This image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 22, 2005, at a distance of approximately 860.000 Km (about 530.000 miles) from Dione. Tethys was on the far side of the rings, 1,5 MKM (roughly 900.000 miles) from Cassini. The image scale is 5 Km (about 3 miles) per pixel on Dione and 9 Km (about 6 miles) per pixel on Tethys".
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Dione&Titan-PIA06607.jpgDione and Titan58 visiteCaption NASA originale:"As artful as it is informative, this captivating portrait captures Saturn's wispy moon Dione over the shoulder of smoggy Titan in a single inspiring scene. Dione is 1.118 Km (approx. 695 miles) across and Titan is 5.150 Km (such as approx. 3.200 miles) across.
The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on Feb. 18, 2005, at a distance of approximately 1,3 MKM (808.000 miles) from Dione and 2,1 MKM (1,3 MMs) from Titan. The image scale is 8 Km (5 miles) per pixel on Dione and 13 Km (8 miles) per pixel on Titan".
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Dione-EB-4311210639_db673f3300_b.jpgA Beautiful "Slice" of Dione (by Elisabetta Bonora - Lunexit Team)52 visitenessun commentoMareKromium
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Dione-EB-LXTT.jpgThe Surface of Dione (an Image-Mosaic by Elisabetta Bonora - Lunexit Team)52 visitenessun commentoMareKromium
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Dione-EB-LXTT1.jpgIn the "Scars" of Dione... (an Image-Mosaic in possible Absolute Natural Colors by Elisabetta Bonora - Lunexit Team)85 visitenessun commentoMareKromium
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Dione-EB-LXTT2.jpgThe Surface of Dione (an Image-Mosaic by Elisabetta Bonora - Lunexit Team)52 visitenessun commentoMareKromium
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