Saturn: the "Ringed Beauty" and His Moons |
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Daphnis, Atlas and the Rings11 visteCaption NASA:"Across the expanse of Saturn's Rings, the Cassini spacecraft spies 2 small moons in consort.
Atlas is seen exterior to the bright outer edge of the A-Ring. Daphnis, below Atlas in this view, orbits Saturn within the narrow Keeler Gap. The presence of Daphnis is revealed by the waves it raises in the ring material surrounding it on the edges of the gap. Daphnis and its waves moved between exposures taken to create this color view, resulting in their slight displacement in each color.
This view looks toward the unilluminated side of the Rings from about 18° above the Ring-Plane. Bright clumps are visible in the narrow F-Ring.
Images taken using red, green and blue spectral filters were combined to create this natural color view. The images were acquired with the Cassini spacecraft narrow-angle camera on April 13, 2007 at a distance of approx. 1,8 MKM (about 1,1 MMs) from Atlas.
Image scale is roughly 11 Km (about 7 miles) per pixel".
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Daphnis is there...somewhere!10 visteCaption NASA:"The presence of the tiny ring moon Daphnis is betrayed by the edge waves it creates in the Keeler Gap.
The Gap is a narrow lane, about 42 Km (26 miles) wide, in Saturn's outer A-Ring. Daphnis (7 Km, or 4,3 miles across) was discovered in Cassini spacecraft images at the same time that scientists spotted the edge waves. Researchers had suspected the presence of a moon in this gap after Pan was discovered in Voyager spacecraft images taken 25 years earlier.
This view looks toward the unilluminated side of the Rings from about 54° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on March 17, 2007 at a distance of approx.y 1,8 MKM (1,1 MMs) from Saturn.
Image scale is roughly 10 Km (about 6 miles) per pixel".
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Daphnis and a Little Star...10 visteCaption NASA:"The Cassini Spacecraft captures a view showing two of Saturn's moons and their gravitational effects on nearby Rings.
At top, Daphnis (about 8 Km, or 5 miles across at its widest point) streaks through the Keeler Gap, with its ever-present edge waves. At center, Prometheus (about 86 Km, or 53 miles across at its widest point) pulls away from a recent encounter with the F-Rring. A bright background star is visible below the F-Ring.
This view looks toward the unilluminated side of the Rings from about 41° above the Ring-Plane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on April 8, 2008. The view was acquired at a distance of approx. 1,3 MKM (such as about 788.000 miles) from Prometheus and at a Sun-Prometheus-Spacecraft, or phase, angle of 53°.
Image scale is roughly 8 Km (about 5 miles) per pixel".
Nota Lunexit: noi vediamo Daphnis, la "Piccola Stella" in basso rispetto all'Anello "F" e la scia lasciata da Prometheus (sull'estrema Sx del frame) a seguito del suo transito ma, di Prometheus...nessuna traccia! E Voi? Lo vedete Prometheus?
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Daphnis and Keeler (detail mgnf)36 vistenessun commento
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Daphnis and Keeler (context image)27 visteCaption NASA originale:"Daphnis, the tiny moon that inhabits the Keeler Gap in the outer edge of Saturn's A-Ring, is captured here in remarkable detail with its entourage of waves.
The edge waves are especially bright in places where Ring material piles up, a characteristic that has been seen in computer simulations of the interactions between gap-embedded moons and the surrounding ring particles.
The 7 Km-wide (about 4,3 mile) moon appears to have an unusual shape in this image. It is not simply a bright dot, but instead exhibits a dimmer component immediately to its left. Though it is far from certain, this component may be Ring material caught in the act of accreting onto Daphnis, a process currently being studied by imaging scientists.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 9, 2006, at a distance of approx. 422.000 Km (such as about 262.000 miles) from Saturn. Image scale is roughly 2 Km (a little more than 1 mile) per pixel".
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Daphnis44 visteThis splendid view offers a detailed look at the faint Rings within the Cassini Division as well as a rare glimpse of the "Keeler Gap Moon", Daphnis. The small, ring embedded moon is a bright unresolved speck above center, near the outer edge of the A ring.
Discovered in Cassini images in 2005, Daphnis is a mere 7 Km (a little less than 4 miles) across.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on March 20, 2006, at a distance of approx. 483.000 Km (such as about 300.000 miles) from Saturn. The image scale on the sky at the distance of Daphnis is about 2 Km (a little more than 1 mile) per pixel.
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Dancing in the dark: Tethys and Titan18 vistenessun commento
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Dancing in the dark24 visteGhostly details make this dark scene more than just a beautiful grouping of two Saturn moons: Tethys and Titan.
In Titan's thick and inflated atmosphere, the detached high haze layer can be seen, as well as the complex Northern Polar "hood". Images like this one can help scientists make definitive estimates of the altitudes to which the high haze extends.
The faint vertical banded pattern is a type of noise that usually is removed during image processing.
Since this image was processed to enhance the visibility of details in Titan's atmosphere as well as in the faint G-Ring, the vertical noise was also enhanced.
This view was obtained in visible light with the Cassini spacecraft narrow-angle camera on Jan. 19, 2006, at a distance of approx. 2,4 MKM (such as about 1,5 MMs) from Titan and 1 MKM (about 600.000 miles) from Tethys. The image scale is 14 Km (about 9 miles) per pixel on Titan and 6 Km (about 4 miles) per pixel on Tethys.
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Damascus Sulcus (possible True Colors; credits: Lunexit)12 visteCaption NASA:"The yellow circles on this mosaic, showing the fracture known as Damascus Sulcus, indicate the Jets' Source Locations II and III, as identified in PIA08385.
This mosaic consists of two images obtained with the clear spectral filters on Cassini's narrow-angle camera. The view is an orthographic projection with an image scale of 24 meters (79 feet) per pixel. The area shown here is centered on 81,2° South Latitude and 309,9° West Longitude. The original images ranged in resolution from 27 to 30 meters (89 to 98 feet) per pixel and were taken at distances ranging from 4200 to 4742 Km (such as from about 2610 to approx. 2947 miles) from Enceladus".
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Damascus Sulcus10 visteCaption NASA:"This image is the 7th skeet-shoot image taken during Cassini's very close flyby of Enceladus on Aug. 11, 2008. Damascus Sulcus is crossing the upper part of the image.
The image was taken with the Cassini Spacecraft narrow-angle camera on Aug. 11, 2008, a distance of approx. 4742 Km (such as about 2947 miles) above the surface of Enceladus.
Image scale is approximately 30 meters (98 feet) per pixel".
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Damascus Sulcus55 visteCaption NASA:"This Cassini image was the eight 'skeet shoot' narrow-angle image captured during the October 31, 2008, flyby of Saturn's moon Enceladus.
The source region for jets II and III (see PIA08385) has been identified. The image was taken with the Cassini Spacecraft narrow-angle camera on Oct. 31, 2008, at a distance of approximately 5568 Km (about 3480 miles) from Enceladus and at a Sun-Enceladus-Spacecraft, or Phase, Angle of 75°.
Image scale is roughly 33 meters (108 feet) per pixel".
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Cutting Dione...28 visteDione is partly occulted by Saturn's Rings in this nearly edge-on view, taken from less than 1/10th of 1° above the Ring-Plane. The side of the Rings nearer to the Cassini spacecraft was masked by Saturn's shadow at the time and appears dark.
Bright, wispy fractures on Dione's trailing Hemisphere curl around the horizon. Sunlit terrain seen on Dione is on the moon's Saturn-facing Hemisphere.
North is up.
The image was taken in infrared light (centered at 752 nanometers) with the Cassini spacecraft narrow-angle camera on Nov. 3, 2005 at a distance of approximately 2.5 million kilometers (1.5 million miles) from Dione and at a Sun-Dione-spacecraft, or phase, angle of 109 degrees. Resolution in the original image was 15 kilometers (9 miles) per pixel.
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