| Piú votate - Saturn: the "Ringed Beauty" and His Moons |
Dione-EB-LXTT3~0.jpgIn the "Scars" of Dione... (an Image-Mosaic in possible Natural Colors by Elisabetta Bonora - Lunexit Team)76 visitenessun commentoMareKromium
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Enceladus-FullColor-MF-PCF1.jpgEnceladus (an Image-Mosaic in Natural Colors; credits for the additional process. and color.: Drr Marco Faccin and Paolo C. Fienga - Lunexit Team)88 visitenessun commentoMareKromium
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Enceladus-N00161060-61-MF-PCF-LXTT.jpgFlying over the "Tiger Stripes" (an Image-Mosaic in Natural Colors; credits for the additional process. and color.: Drr Marco Faccin and Paolo C. Fienga - Lunexit Team)102 visitenessun commentoMareKromium
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Enceladus-N00161119-21-EB-LXTT.jpgAlmost Full Enceladus (Natural Colors; credits for the additional process. and color.: Elisabetta Bonora - Lunexit Team)67 visitenessun commentoMareKromium
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Dione-N160934-48-EB-LXTT.jpgDione (an Image-Mosaic in RAW Natural Colors by Elisabetta Bonora - Lunexit Team)67 visitenessun commentoMareKromium
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The_Sky_of_Saturn-Quartet-N00159961-N00159982_logo.gifThe "Saturnian Quartet" (a GIF-Movie by Dr Gianluigi Barca)84 visiteOltre al fatto che si tratta di un filmato splendido, Vi invitiamo ad individuare le Lune Saturniane che vi appaiono.
Buon Lavoro e SEMPRE Complimenti al nostro Big "G"!MareKromium
(4 voti)
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Cosmic_WaterFall-N00160095-N00160115_logo.gifCosmic Waterfall (a GIF-Movie by Dr Gianluigi Barca - Lunexit Team)63 visitenessun commentoMareKromium
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Prometheus-PIA12787.jpgGravitational Waves97 visitenessun commentoMareKromium
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Saturn-N00157424-EB-LXTT.jpgTemporary Darkness... (An Image-Mosaic in Natural Colors; credits for the additional process. and color.: Elisabetta Bonora - Lunexit Team)70 visitenessun commentoMareKromium
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Propeller-PIA12790-1.jpgSaturnian "Propeller": Earhart57 visiteA propeller-shaped structure created by an unseen moon is brightly illuminated on the Sunlit Side of Saturn's Rings in this image obtained by NASA's Cassini Spacecraft.
The moon, which is too small to be seen, is at the center of the Propeller Structure visible in the upper left of the image, near the Encke Gap of the A-Ring. The A-Ring is the outermost of Saturn's Main Rings.
The moon is likely about 1 Km (a little moere than half a mile) across. Disturbed ring material to the upper left and lower right of the moon reflects Sunlight brightly and appears like a white airplane propeller.
Several density waves are also visible in the Ring. A spiral density wave is a spiral-shaped accumulation of particles that tightly winds many times around the Planet. It is the result of gravitational tugs by individual moons whose orbits are in resonance with the particles' orbits at a specific distance from Saturn.
A Propeller's appearance changes with viewing geometry, and this image shows the way a Propeller looks when viewed from the sunlit side of the Rings. Contrasts can reverse when the structure is observed on the dark side of the Rings: for example, the bright structure of this Propeller corresponds to the dark portion at the center of the propeller seen in PIA12791 which was imaged from the unilluminated side of the Rings.
This image is part of a growing catalogue of "Propeller Moons" that, despite being too small to be seen, enhance their visibility by creating larger disturbances in the surrounding fabric of Saturn's Rings. Cassini scientists now have tracked several of these individual Propeller Moons embedded in Saturn's disk over several years.
These images are important because they represent the first time scientists have been able to track the orbits of objects in space that are embedded in a disk of material. Continued monitoring of these objects may lead to direct observations of the interaction between a disk of material and embedded moons. Such interactions help scientists understand fundamental principles of how Solar Systems formed from disks of matter. Indeed, Cassini scientists have seen changes in the orbits of these moons, although they don't yet know exactly what causes these changes.
Imaging scientists nicknamed the Propeller shown here "Earhart" after the early American aviatrix Amelia Earhart. The Propeller Structure is about 5 Km (a little more than 3 miles) in the radial dimension (the dimension moving outward from Saturn which is far out of frame to the lower right of this image). It is about 60 Km (approx. 35 miles) in the azimuthal (longitudinal) dimension.
This same Propeller can be seen casting a shadow around the time of the Planet's Equinox in PIA11672. See PIA07791 and PIA07792 to learn more about Propeller shapes and to see smaller Propellers.
Scale in the original image was about 2 Km (about 1,3 miles) per pixel. The image has been rotated and contrast-enhanced to aid visibility.
This view looks toward the Southern, sunlit side of the Rings from about 81° below the Ring-Plane. The image was taken in Visible Light with the Cassini Spacecraft narrow-angle camera on April 11, 2008. The view was obtained at a distance of approx. 364.000 Km (such as about 226.000 miles) from Saturn and at a Sun-Saturn-Spacecraft, or Phase, Angle of 82°.MareKromium
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Propeller-PIA12790-2.jpgSaturnian "Propeller": Blériot61 visiteNASA's Cassini Spacecraft captured a Propeller-shaped Disturbance in one of Saturn's Rings created by a moon that is too small to be seen here.
The moon, likely about 1 Km (a little more than half a mile) across, is invisible at the center of the image. However, it is larger than many other "Propeller" moons and has cleared ring material from the dark wing-like structures to its left and right in the image. Disturbed ring material closer to the moon reflects Sunlight brightly and appears like a white airplane propeller. This Propeller appears in the A-Ring, which is the outermost of Saturn's Main Rings.
Taken in 2006, this image is part of a growing catalogue of "Propeller Moons" that, despite being too small to be seen, enhance their visibility by creating larger disturbances in the surrounding fabric of Saturn's Rings. Cassini scientists now have tracked several of these individual Propeller Moons embedded in Saturn's disk over several years.
These images are important because they represent the first time scientists have been able to track the orbits of objects in space that are embedded in a disk of material. Continued monitoring of these objects may lead to direct observations of the interaction between a disk of material and embedded moons. Such interactions help scientists understand fundamental principles of how Solar Systems formed from disks of matter. Indeed, Cassini scientists have seen changes in the orbits of these moons, although they don't yet know exactly what causes these changes.
Imaging scientists nicknamed the Propeller shown here "Bleriot" after a French aviator named Louis Bleriot.
The Propeller's structure is about 5 Km (approx. 3 miles) in the radial dimension -- the dimension moving directly outward from Saturn. The dark wings appear approx. 1100 Km (about 700 miles) in the azimuthal (longitudinal) dimension, while the central propeller structure is roughly 110 Km (about 70 miles) long.
See PIA12792 to watch a movie of "Bleriot." PIA11672 shows the giant propeller "Earhart" named after another aviator, Amelia Earhart. See PIA07791 and PIA07792 to learn more about propeller shapes and to see smaller propellers.
This image has been re-projected so that orbiting material moves to the right and Saturn is down. The Propeller was seen at the edge of the camera's field of view when the image was taken, so some data were missing; the blank space at the top of the image was filled in with a gray color. Scale in the original image was approx. 2 Km (about 1,3 miles) per pixel. Image scale in this re-projected view is about 1 Km (a little more than half a mile) per pixel.
This view looks toward the Southern, Sunlit side of the Rings from about 30° below the Ring-Plane. The image was taken in Visible Light with the Cassini Spacecraft narrow-angle camera on Dec. 15, 2006. The view was acquired at a distance of approx. 463.000 Km (about 288.000 miles) from Saturn and at a Sun-Saturn-Spacecraft, or Phase, Angle of 15°.MareKromium
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The_Rings-N00154629-35-EB-LXTT.gifAstrophysics in motion (a GIF-Movie by Elisabetta Bonora - Lunexit Team)106 visitenessun commentoMareKromium
(4 voti)
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