| Ultimi arrivi - Saturn: the "Ringed Beauty" and His Moons |
Mimas-PIA08278.jpgHerschel Crater on Mimas57 visiteCaption NASA:"The great basin that interrupts the contours of this moon's crescent identifies the satellite unmistakably as Mimas. The giant crater Herschel (about 130 Km, or 80 miles wide) is this moon's most obvious feature.
North on Mimas (approx. 397 Km, or 247 miles, across) is up and rotated 23° to the left.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 8, 2006 at a distance of approx. 534.000 Km (about 331.000 miles) from Mimas and at a Sun-Mimas-spacecraft, or phase, angle of 115°. Image scale is roughly 3 Km (about 1,9 miles) per pixel".Ott 03, 2006
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The Rings-PIA08277.jpgThe "Encke Gap" in detail57 visiteCaption NASA:"Although the embedded moon Pan is nowhere to be seen, there is a bright clump-like feature visible here, within the Encke Division.
Also discernable are periodic brightness variations along the outer (right side) gap edge. (...)
The view looks toward the sunlit side of the rings from about 17° below the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 9, 2006 at a distance of approx. 421.000 Km (about 261.000 miles) from Saturn. Image scale on the sky at the distance of Saturn is roughly 2 Km (1,4 miles) per pixel".Set 30, 2006
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Atlas-N00066579.jpgAtlas...maybe...66 visiteAbbiamo delle difficoltà ad identificare con certezza quale sia l'oggetto ripreso da Cassini ma, dopo aver dato una scorsa ai nostri Archivi, riteniamo - effettuando una comparazione visuale - che l'oggetto ripreso in questo frame sia la piccola luna conosciuta come Atlas.
Se Voi avete dei dubbi o ritenete che la nostra valutazione possa essere (o sia), di fatto, errata, scriveteci e dateci una mano a risolvere il mistero.
Caption NASA:"N00066579.jpg was taken on September 25, 2006 and received on Earth September 26, 2006. The camera was pointing toward SATURN, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".Set 28, 2006
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The Rings-PIA08275.jpgThe Rings55 visiteCaption NASA originale:"This wide and sweeping view of the sunlit Rings of Saturn takes in the impressive variety in their structure -- from the clumpy and perennially intriguing F-Ring to the many waves, ringlets and gaps in the A and B Rings and the Cassini Division in between.
The image was taken in visible light with the Cassini spacecraft wide-angle camera on Sept. 9, 2006 at a distance of approx. 640.000 Km (about 397.000 miles) from Saturn. The view was acquired from about 10° below the Ring-Plane. Image scale on the sky at the distance of Saturn is approx. 35 Km (about 22 miles) per pixel".Set 28, 2006
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The Rings-N00066660.jpgThe Sun through the Rings (2)56 visitenessun commentoSet 28, 2006
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The Rings-N00066646.jpgThe Sun through the Rings (1)57 visitenessun commentoSet 28, 2006
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Enceladus-PIA08276.jpgEnceladus57 visiteCaption NASA originale:"Cassini spies the wrinkled, fractured and remarkably crater-poor terrain of Enceladus. Scientists are working to understand what causes the moon's surprising geologic activity (see also PIA07759).
North on Enceladus is up and rotated 20° to the left.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 8, 2006 at a distance of approx. 560.000 Km (about 348.000 miles) from Enceladus and at a Sun-Enceladus-spacecraft, or phase, angle of 103°. Image scale is roughly 3 Km (a little less than 2 miles) per pixel".Set 28, 2006
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Janus-N00066645.jpgMoments of "Janus" (3)60 visitenessun commentoSet 28, 2006
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Janus-N00066628.jpgMoments of "Janus" (2)57 visitenessun commentoSet 28, 2006
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Janus-N00066626.jpgMoments of "Janus" (1)60 visitenessun commentoSet 28, 2006
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Saturn-PIA08274.jpgSaturnian turbulences...57 visiteCaption NASA originale:"With no solid land to obstruct their progress, dark vortices often roll through Saturn's Atmosphere for months or years, before merging with other vortices. On Earth, the continents usually halt the progress of large storms, like hurricanes. Vortices like these are part of the general circulation pattern of East-West flowing cloud bands, called jets, on Saturn.
The image was taken using a spectral filter sensitive to wavelengths of infrared light centered at 939 nanometers. The image was obtained with the Cassini spacecraft wide-angle camera on Aug. 16, 2006 at a distance of approximately 259.000 Km (about 161.000 miles) from Saturn. Image scale is roughly 12 Km (about 7 miles) per pixel".
Nota: quando la NASA parla di "distanza da Saturno" (come da Giove, Urano e Nettuno) essa fa convenzionalmente riferimento alla distanza che intercorre fra Sonda e "clouds' top", ovvero lo strato più alto (e l'ultimo) di nuvole, superato il quale inizia lo spazio esterno. In caso di corpi rocciosi, invece, la distanza è riferita allo spazio esistente fra Sonda e "datum" (o altitudine zero) del corpo celeste considerato.Set 26, 2006
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Japetus-PIA08273.jpgDuotone Moon58 visiteCaption NASA originale:"The many impact scars borne by Japetus are made far more conspicuous in the Region of Transition from its dark Hemisphere to its bright one.
In this terrain, the dark material that coats Cassini Regio accentuates slopes and crater floors, creating a land of stark contrasts.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 6, 2006 at a distance of approx. 2,2 MKM (about 1,4 MMs) from Japetus and at a Sun-Japetus-spacecraft, or phase, angle of 26°. Image scale is roughly 13 Km (about 8 miles) per pixel".Set 25, 2006
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