| Piú votate - Saturn: the "Ringed Beauty" and His Moons |
The Rings-PIA08285.jpgNot the Sun, but Aldebaran!55 visitenessun commento
(2 voti)
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Atlas-N00066579.jpgAtlas...maybe...64 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".
(2 voti)
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Earth-PIA08324-2.jpgEarth, from Saturn's Space (2)57 visiteThis magnified view of the image taken through the clear filter (monochrome) shows the Moon as a dim protrusion to the upper left of Earth. Seen from the Outer Solar System through Cassini's cameras, the entire expanse of direct human experience, so far, is nothing more than a few pixels across. Earth no longer holds the distinction of being our Solar System's only "water world", as several other bodies suggest the possibility that they too harbor liquid water beneath their surfaces. The Saturnian moon, Enceladus, is among them, and is also captured on the left in this image, with its plume of water ice particles and swathed in the blue E-Ring which it creates. Delicate fingers of material extend from the active moon into the E-Ring. The narrow and tenuous G-Ring and the Main Rings are seen at the right. The view looks down from about 15° above the un-illuminated side of the Rings.
Images taken using red, green and blue spectral filters were combined to create this view. The image was taken by the Cassini spacecraft wide-angle camera on Sept. 15, 2006, at a distance of approx. 2,1 MKM (about 1,3 MMs) from Saturn and at a sun-Saturn-spacecraft angle of almost 179°.
Image scale is roughly 129 Km (about 80 miles) per pixel.
At this time, Cassini was nearly 1,5 BKM (about 930 MMs) from Earth.
(2 voti)
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Saturn-W00018088.jpgWhat do some images show? (4)70 visiteNota: lo "streak" lo abbiamo definito anomalo poichè NON si tratta di un photo-artifact (sicuramente) e non pare proprio essere un "raggio cosmico".
Il motivo per cui escludiamo l'ipotesi di "raggio cosmico" deriva dalla circostanza per cui lo "streak" appare, innanzitutto, troppo lungo - esperienza su immagini relative a precedenti "raggi cosmici" confermati come tali dalla NASA alla mano - e poi perchè, operando un'elevata risoluzione del frame, la traccia si risolve in una serie di "puntini" allineati, tipici - anche in fotografia terrestre - della ripresa di un oggetto luminoso in movimento su campo scuro (es. aereo o satellite artificiale in transito).
(2 voti)
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Saturn-W00017998.jpgWhat do some images show? (3)55 visitenessun commento
(2 voti)
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Saturn-W00017984.jpgWhat do some images show? (2)97 visitenessun commento
(2 voti)
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Saturn-W00017983.jpgWhat do these images show? (1)57 visitenessun commento
(2 voti)
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Saturn-W00017924.jpgRising Sun...55 visiteCaption NASA:"W00017924.jpg was taken on September 15, 2006 and received on Earth September 17, 2006. The camera was pointing toward Saturn that, at the time, was approximately 2.092.473 Km away.
The image was taken using the CB3 and CL2 filters. This image has not been validated or calibrated".
(2 voti)
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The Rings-N00065689.jpgShining through the Rings... (2)54 visitenessun commento
(2 voti)
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The Rings-N00065684.jpgShining through the Rings... (1)54 visiteUn Sole - il nostro Sole - splende nello Spazio di Saturno e, fra pochi istanti, si immergerà negli Anelli.
Due sugestive immagini CASSINI che riprendono un Sole piccolo e lontano, ma comunque luminoso...
(2 voti)
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Saturn-PIA08250.jpgThe Rings over Saturn's Terminator54 visiteCaption NASA originale:"With Saturn's Terminator as a backdrop, this view of the unlit face of the Rings makes it easy to distinguish between areas that are actual gaps, where light passes through essentially unimpeded, and areas where the Rings block or scatter light. The gaps are regions in which the brightness varies strongly from left to right as the background goes from bright to dark.
Parts of the image are saturated at left.
The image was taken in visible light with the Cassini spacecraft wide-angle camera on July 24, 2006 at a distance of approx. 577.000 Km (such as about 359.000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 101°. Image scale is roughly 31 Km (about 19 miles) per pixel".
(2 voti)
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The Rings-PIA08243.jpgThe Huygens "Gap"54 visiteCaption NASA:"The sharp outer boundary of Saturn's B-Ring, which is the bright ring region seen to the right in this image, is maintained by a strong resonance with the moon Mimas. For every two orbits made by particles at this distance from Saturn, Mimas makes one orbit.
The moon's repeated gravitational tugs force ring particles away from this region.
The dark region is called the "Huygens Gap" and it includes the bright, eccentric Huygens Ringlet, also visible here near center".
(2 voti)
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