| Piú viste - Saturn: the "Ringed Beauty" and His Moons |
Saturn-PIA11513.jpgSouthern Colors (Natural Colors; credits: NASA/JPL/Space Science Institute)70 visiteCaption NASA:"The Cassini Spacecraft samples a bit of Saturn's Southern Hemisphere along with a spread of the Planet's main Rings.
Working outward from the Planet, the C, B, and A-Rings are visible in this Natural Color image. The Rings have been brightened relative to the Planet to enhance their visibility.
This view looks toward the sunlit side of the Rings from about 59° below the Ring-Plane. 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 wide-angle camera on April 23, 2009 at a distance of approx. 1 MKM (about 621.000 miles) from Saturn.
Image scale is roughly 58 Km (approx. 36 miles) per pixel".MareKromium
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Japetus-A-W-Deathstar-Comp2.jpgIs this Japetus?!?69 visiteE Voi? E noi? Forse sposare il CICAP (tanto per citare una fonte di pensiero razionale e tralasciando le "simpatie" o le "antipatie" che i suoi membri possono suscitare) è un errore, così come può essere un errore sposare "The Enterprise Mission" del Prof. Hoagland. Perchè? Perchè non ricordiamo di aver MAI sentito dire, nè agli uni, nè all'altro, una frase del tipo "NON SO CHE COSA DIRE"! Mai un dubbio, mai un'indecisione: costoro hanno solo e sempre certezze. Beati loro! Noi, invece, di certezze ne abbiamo davvero poche. Forse solo una, ad oggi, ed è quella che rende Voi, Liberi Pensatori, e noi, Liberi Ricercatori, un genus a parte. E non si tratta neppure di una certezza, ma solo della consapevolezza che, nella Vita come nell'Universo, non c'è davvero nulla di certo...
"Nemo potest omnia scire" (Varrone)
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Telesto-PIA07586.jpgTelesto69 visiteCaption originale:"The blob of light seen here is Saturn's moon Telesto, which shares its orbital path with much larger Tethys. Telesto is 24 Km across.
Although this view may hint at a flattened, potato-like shape for Telesto (a common shape for Saturn's smaller moons), no features on the moon's surface can be resolved here.
The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on Aug. 1, 2005, at a distance of approximately 768.000 Km from Telesto and at a Sun-Telesto-spacecraft angle of 37°. Resolution in the original image was 5 Km per pixel. The image has been contrast-enhanced and magnified by a factor of 4 to aid visibility".
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Prometheus-PIA09834.jpgThe "visual meaning" of Gravity69 visiteCaption NASA:"Two dark gores in Saturn's F-Ring demonstrate the gravitational influence of the shepherd moon Prometheus.
The older gore at the top of this view is at a steeper angle than the newer addition just above and to the left of Prometheus, since the former has sheared out over the course of an orbit: particles on the inner (right) side of the F-Ring travel faster in the same amount of time than the particles on the outer (left) side, leaving the outer particles behind. Prometheus (102 Km, or about 63 miles across) is lit at left by direct sunlight and at right by reflected light from Saturn. The bright, sunlit portion of the moon is overexposed.
Two background stars are captured above Prometheus in this view, which looks toward the unilluminated side of the Rings from about 33° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Jan. 1, 2008. The view was acquired at a distance of approx. 1,5 MKM (such as Rabout 956.000 miles from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 62°.
Image scale is roughly 9 Km (approx. 6 miles) per pixel".
MareKromium
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The_Rings-N00123873.jpgAnother UFO in the Space of Saturn: the UFO has diappeared (natural colors; credits: Lunexit)69 visitenessun commentoMareKromium
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Prometheus-N00128992-b.gifPrometheus: the "Wave-Maker" (GIF-Movie; credits: Dr M. Faccin)69 visitenessun commentoMareKromium
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Startrail1-N00135035.gifStartrail or UFO in-transit? (GIF-Movie; credits: Dr G. Barca)69 visitenessun commentoMareKromium
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Saturn-PIA11613.jpgPost-Equinox Colors (Natural Colors; credits: NASA/JPL/Space Science Institute)69 visiteCaption NASA:"The Cassini Spacecraft captured this Natural Color View of Saturn almost a month after the Planet's August 2009 Equinox. The shadow cast on the Planet by the Rings remains narrow.
Spokes are visible on the B-Ring. To learn more about these ghostly radial structures, see PIA11144.
Mimas (approx. 396 Km, or about 246 miles across) can be seen in the lower left. Mimas and the Rings have been brightened relative to the Planet to increase visibility.
The novel illumination geometry that accompanies Equinox lowers the Sun's angle to the Ring-Plane, significantly darkens the Rings, and causes out-of-plane structures to look anomalously bright and cast shadows across the Rings. These scenes are possible only during the few months before and after Saturn's Equinox, which occurs only once in about 15 Earth years.
Before and after Equinox, Cassini's cameras have spotted not only the predictable shadows of some of Saturn's moons (see PIA11657), but also the shadows of newly revealed vertical structures in the Rings themselves (see PIA11665).
This view looks toward the Northern, sunlit side of the Rings from about 10° above the Ring-Plane.
The red, green and blue images that were mosaicked together to create this view were obtained with the Cassini Spacecraft wide-angle camera on Sept. 4, 2009. The view was obtained at a distance of approx. 2,7 MKM (such as about 1,7 MMs) from Saturn and at a Sun-Saturn-Spacecraft, or Phase, Angle of 92°.
Image scale is roughly 156 Km (about 97 miles) per pixel".MareKromium
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Enceladus-N00145360-N00145369.gifChange of Trajectory? (GIF-Movie; credits: Dr G. Barca)69 visiteUno spettacolo al quale siamo (si fa per dire) "abituati": le Fontane di Encelado. Ed ancora una volta, mentre le Fontane disegnano lampi ed archi di luce nello Spazio circum-Saturniano, un oggetto non identificato sfreccia davanti alle fotocamere di CASSINI.
La peculiarità ? E' nel fatto che l'oggetto luminoso SEMBRA effettuare un leggero - ma visibile! - cambio di traiettoria proprio mentre passa davanti agli occhi elettronici dell'Orbiter.
Che dire? Il "traffico", dalle parti di Saturno, è veramente intenso... Grandissimi Complimenti e Ringraziamenti al Dr Barca per l'ennesimo - splendido - Lavoro.MareKromium
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Skoll-EB2.gifSköll? (GIF-Movie; credits: Elisabetta Bonora)69 visiteversione migliorata ed ingrandita del precedente GIF-MovieMareKromium
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Helene-MF-IR.jpgHelene (IR View - credits: Dr M. Faccin - Lunexit Team)69 visitenessun commentoMareKromium
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Enceladus-N00160966-N00160995-GB-LXTT3.gifClosing-up on the Enceladian "Fountains of Light" (a GIF-Movie by Dr Gianluigi Barca - Lunexit Team)69 visitenessun commentoMareKromium
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