| Piú votate - Saturn: the "Ringed Beauty" and His Moons |
Hyperion from Voyager 2.jpgHyperion from Voyager 274 visitenessun commento
(19 voti)
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Rings-PIA07654.jpgCrescent Enceladus and Crescent Rings56 visiteSunlight reflects off the bright, frozen surfaces of the billions and billions of particles comprising Saturn's Rings to brighten the Planet's Southern Skies.
The particles in Saturn's Rings are each too small to be seen by Cassini in this image but, if they could, each would look like the bright reflective crescent of Enceladus seen here, with each reflecting sunlight onto the Southern Hemisphere of the Planet.
The image was taken in polarized infrared light with Cassini's wide-angle camera on Nov. 2, 2005, at a distance of approx. 1,7 MKM (1,1 MMs) from Saturn and at a phase angle of 119°. The image scale is roughly 104 Km (about 65 miles) per pixel.
(8 voti)
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Saturn-PIA06619.jpgThe Southern Side of Saturn55 visiteCaption NASA originale:"Viewed nearly edge-on, Saturn's rings appear dark and pencil-thin against the backdrop of the planet's swirling clouds. Notable here are the shadows cast by the rings onto the northern hemisphere, as well as details of the banded atmosphere, such as the bright equatorial region. The image was taken with the Cassini spacecraft wide-angle camera on Feb. 18, 2005, at a distance of approximately 1,2 MKM from Saturn through a filter sensitive to wavelengths of infrared light centered at 727 nnmts, where gaseous methane absorbs. The image scale is 67 Km per pixel".
(8 voti)
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Epimetheus from Voyager 1.jpgEpimetheus from Voyager 163 visiteUn'altra "Luna Minore" di Saturno, dalla forma bizzarra.
Forse un'altra "preda" dell'abbraccio gravitazionale di Saturno?
(8 voti)
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TITAN-N00006532.jpgTitan from app.x 340.000 Km away - Lightnings on Titan or a scratch in the picture?56 visitenessun commento
(8 voti)
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SATURN-PIA06097_modest.jpgThe "F" Ring - first picture64 visitenessun commento
(8 voti)
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Dione-PIA07745-5.jpgDione's horizon - HD (5)54 visitenessun commento
(21 voti)
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Mimas-N00055623.jpgMimas (2)60 visiteCaption originale:"N00055623.jpg was taken on March 21, 2006 and received on Earth March 22, 2006. The camera was pointing toward Mimas that, at the time, was approximately 190.524 Km away.
The image was taken using the CL1 and CL2 filters".
(13 voti)
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Enygma-W00012880.jpgEnygma (4)65 visiteOriginal caption:"W00012880.jpg was taken on January 05, 2006 and received on Earth January 06, 2006. The camera was pointing toward SKY, and the image was taken using the CB2 and CL2 filters. This image has not been validated or calibrated".
(13 voti)
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Mimas&Titan-PIA07666.jpgBig Brother, Little Brother...56 visiteOriginal caption:"Titan, the Saturn's largest moon and Mimas - in the foreground - are seen together in this view from Cassini.
Titan's gravity is weaker than Earth's, so the moon's atmosphere is quite extended - a "quality" that is very well hinted at in this view.
Part of Mimas' dark side is illuminated by reflected light from nearby Saturn.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Dec. 3, 2005, at a distance of approx. 3,6 MKM (about 2,2 MMs) from Titan and 2,5 MKM (1,6 MMs) from Mimas.
Both moons are seen at a phase angle of 110°.
The image scale is 22 Km (roughly 14 miles) per pixel on Titan and 15 Km (about 9 miles) per pixel on Mimas".
(13 voti)
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Dione-PIA07745-1.jpgDione's horizon - HD (1)54 visiteOriginal caption:"As it departed its encounter with Saturn's moon Dione, Cassini sailed above an unreal landscape blasted by impacts. The rising Sun throws craters into sharp contrast and reveals steep crater walls.
At the far right, a medium-sized crater is bisected by a fracture, revealing a cross section of the impact site.
The seven clear-filter images in this mosaic were taken with the Cassini spacecraft narrow-angle camera on Oct. 11, 2005, at distances ranging from of 21.650 to 25.580 Km (about 13.450 to 15.890 miles) from Dione and at a Sun-Dione-spacecraft, or phase, angle of 154°. Resolution in the original images ranges from 126 to 154 mt (about 413 to 505 feet) per pixel. The images have been re-sized to have an image scale of about 100 mt (330 feet) per pixel. North on Dione is 140° to the left".
(13 voti)
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Hyperion-N00040207.jpgHyperion (4)67 visiteSiamo a meno di 75.000 Km da Hyperion: il rilievo a forma ellissoidale a cui avevamo fatto cenno in precedenza (e che la NASA battezzerà certamente come "impact basin") si riesce a vedere molto bene, così come si vede molto bene che l'intera superficie di Hyperion, in tutte le direzioni, è (letteralmente) martoriata da crateri (crateri che, sulla base della nostra esperienza, presentano caratteristiche esteriori - diremmo una "conicità" pronunciata - tali da renderli decisamente anomali). Molto interessante, inoltre, potrebbe essere il rilievo - che abbiamo cerchiato in grigio - il quale è appena intuibile, fra luce ed ombra, sul Polo Nord apparente di Hyperion.
Forse una montagna? O forse, dopo una depressione posta proprio su quello che, in questi frames, appare come il Polo Nord di Hyperion, si innalza una nuova parete rocciosa di svariati Km? Noi non lo sappiamo, ma quello che vediamo ci spinge a credere che il record di altezza di un crepaccio (attualmente detenuto dalle "Verona Rupes") sia in pericolo.
(13 voti)
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