| Piú viste - Saturn: the "Ringed Beauty" and His Moons |
Dione-N00042630.jpgDione behind the Rings55 visiteOriginal caption:"N00042630.jpg was taken on November 03, 2005 and received on Earth November 05, 2005. The camera was pointing toward DIONE at approximately 2.460.100 Km away, and the image was taken using the P120 and UV3 filters. This image has not been validated or calibrated".
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PandoraandDione-PIA07625.jpgPandora and Dione55 visiteOriginal caption:"This view looks up toward the sunlit side of Saturn's rings, as Dione and Pandora trundle by. The moons are on the near side of the Rings and the Planet's shadow stretches across the Rings in the background.
The Cassini spacecraft took this image in visible light with its narrow-angle camera on Sept. 16, 2005, at a distance of approx. 2,4 MKM (such as roughly 1,5 MMs) from Saturn. The image scale is of about 12 Km (7 miles) per pixel on Dione".
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Dione-PIA07627.jpgDione and the F-Ring (in natural colors)55 visiteOriginal caption:"Saturn's moon Dione is about to swing around the edge of the thin F-Ring in this color view. More than one thin strand of the F-Ring's tight spiral can be seen here.
The terrain seen on Dione is on the moon's Saturn-facing hemisphere.
Images taken using infrared, green and ultraviolet spectral filters were composited to create this color view. The images were taken with the Cassini spacecraft narrow-angle camera on Sept. 20, 2005, at a distance of approx. 2 MKM (about 1,2 MMs) from Dione and at a phase angle of 48°.
The image scale is of about 12 Km (such as roughly 7 miles) per pixel".
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Japetus-N00042846.jpgApproaching Japetus55 visiteOriginal caption:"N00042846.jpg was taken on November 09, 2005 and received on Earth November 10, 2005. The camera was pointing toward Japetus at approx. 639.972 Km away, and the image was taken using the IR2 and CL2 filters. This image has not been validated or calibrated".
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Japetus-N00042868.jpgApproaching Japetus (over-exposed)55 visiteOriginal caption:"N00042868.jpg was taken on November 11, 2005 and received on Earth November 11, 2005. The camera was pointing toward Japetus at approx. 480.167 Km away, and the image was taken using the CL1 and CL2 filters".
Nota: una stella si "allunga" (non si tratta di un raggio cosmico nè di un UFO in transito) e Giapeto, da nero o quasi, diventa di un bel color bianco brillante. Alcuni dettagli emergono dall'oscurità, altri annegano nella luce.
Ma non c'è nessun mistero: questi particolari sono solo i segni evidenti di un'immagine ottenuta allungando i tempi di esposizione.
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Mimas-N00042871.jpgMimas and Titan55 visiteOriginal caption:"N00042871.jpg was taken on November 11, 2005 and received on Earth November 11, 2005. The camera was pointing toward Mimas (and Titan) at approximately 3.224.642 Km away, and the image was taken using the CL1 and CL2 filters".
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Dione&Tethys-PIA07630.jpgThe Eternal Companions55 visiteOriginal caption:"The moons Dione and Tethys face each other across the gulf of Saturn's Rings. Here, the Cassini spacecraft looks on the Saturn-facing Hemisphere of Tethys below and the anti-Saturn side of Dione above. The dark groove in the Rings is the Cassini Division.
This image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 22, 2005, at a distance of approximately 860.000 Km (about 530.000 miles) from Dione. Tethys was on the far side of the rings, 1,5 MKM (roughly 900.000 miles) from Cassini. The image scale is 5 Km (about 3 miles) per pixel on Dione and 9 Km (about 6 miles) per pixel on Tethys".
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Dione in 3D.gifDione in 3D55 visitenessun commento
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Japetus-N00043065.jpgLand of night55 visiteOriginal caption:"N00043065.jpg was taken on November 14, 2005 and received on Earth November 15, 2005. The camera was pointing toward Japetus at approximately 554.430 Km away, and the image was taken using the P60 and MT2 filters. This image has not been validated or calibrated".
Nota: questa immagine ci offre, oltre ad una "inquietante" (e comunque davvero molto bella) veduta di Giapeto, anche un interessante ed assai variegato campionario di photographic artifacts (incluse anche alcune strisce di luce che vengono ufficialmente attribuite al transito di Raggi Cosmici).
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The Rings-PIA07631.jpgThe sweet colors of the Rings (approx. true colors)55 visiteOrigThe dark Cassini Division, within Saturn's Rings, contains a great deal of structure, as seen in this color image. The sharp inner boundary of the division (left of center) is the outer edge of the massive B-Ring and is maintained by the gravitational influence of the moon Mimas.
Spectroscopic observations by Cassini indicate that the Cassini Division, similar to the C-Ring, contains more contaminated ice than do the B and A-Rings on either side.
This view is centered on a region approx. 118.500 Km (about 73.600 mi) from Saturn's center. (Saturn is about 120.500 Km wide - roughly 74.900 mi - at the equator.) From left to right, the image spans approx. 11.000 Km (about 6.800 mi) across the Ring-Plane. Images taken using red, green and blue spectral filters were combined to create this view, which approximates what the human eye might see. The image was taken with the Cassini spacecraft narrow-angle camera on May 18, 2005, at a distance of approx. 1,6 MKM (about 1 MMs) from Saturn. Res. is 9 Km per px.
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Dione-PIA07637.jpgDione: over the clouds of Saturn55 visiteOriginal caption:"Cassini prepared for its rendezvous with Dione on Oct. 11, 2005, capturing the brilliant, cratered iceball in front of its shadow-draped planet. The terrain seen here becomes notably darker toward the West, and is crosscut by the bright, fresh canyons that form wispy markings on Dione's Trailing Hemisphere.
The image was taken in visible light with the Cassini wide-angle camera at a distance of approx. 24.500 Km (about 15.200 miles) from Dione and at a phase angle of 22°. The image scale is about 2 Km (about 1 mile) per pixel".
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Epimetheus&Janus-N00043522.jpgJanus and Epimetheus (1)55 visiteN00043522.jpg was taken on November 29, 2005 and received on Earth November 29, 2005. The camera was pointing toward Epimetheus that, at the time, was approximately 1.095.193 Km away, and the image was taken using the CL1 and CL2 filters.
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