| Piú votate - Saturn: the "Ringed Beauty" and His Moons |
Dione-PIA07690.jpgDione's faulted surface (HR)60 visiteCaption originale"This view highlights tectonic faults and craters on Dione, an icy world that has undoubtedly experienced geologic activity since its formation.
This view looks toward the Leading Hemisphere on Dione (which is about 1.126 Km - or 700 miles - across). North is up and rotated 20° to the right.
The image was taken with the Cassini spacecraft narrow-angle camera on Dec. 24, 2005 at a distance of approximately 151.000 Km (roughly 94.000 miles) from Dione and at a phase angle of 99°. Image scale is approx. 896 mt (about 2.940 feet) per pixel".
(3 voti)
|
|
Rhea-PIA07689.jpgRhea58 visiteOriginal caption:"Scarred and battered Rhea fills the Cassini spacecraft's view. Notable here is the sharp relief of steep crater walls near the terminator.
Icy Rhea (1.528 Km --> 949 miles across) is Saturn's second-largest moon. This view shows terrain on Rhea's Trailing Hemisphere. North is up and rotated 22° to the left.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Dec. 24, 2005 at a distance of approximately 267.000 Km (such as 166.000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 59°. Image scale is 2 Km per pixel".
(3 voti)
|
|
Epimetheus-PIA07680.jpgSinking in a Sea of Darkness...57 visiteThe Cassini spacecraft captured this glimpse of icy Epimetheus just before the small moon disappeared behind the bulk of Saturn's atmosphere.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Dec. 20, 2005, at a distance of approx. 2,3 MKM (about 1,4 MMs) from Epimetheus and 2,2 MKM (about 1,3 MMs) from Saturn. The image scale is roughly 14 Km (about 9 miles) per pixel on Epimetheus and approx. 13 Km (about 8 miles) per pixel on Saturn.
(3 voti)
|
|
Mimas-N00048622.jpgOver the clouds of Saturn: Mimas (2)61 visiteOriginal caption:"N00048613.jpg was taken on January 19, 2006 and received on Earth January 19, 2006. The camera was pointing toward Mimas that, at the time, was approximately 1.011.360 kilometers away, and the image was taken using the CL1 and CL2 filters.
This image has not been validated or calibrated".
(3 voti)
|
|
Mimas-N00048613.jpgOver the clouds of Saturn: Mimas (1)64 visiteOriginal caption:"N00048613.jpg was taken on January 19, 2006 and received on Earth January 19, 2006. The camera was pointing toward Mimas that, at the time, was approximately 1.011.360 kilometers away, and the image was taken using the CL1 and CL2 filters.
This image has not been validated or calibrated".
(3 voti)
|
|
Enygma-W00012847.jpgEnygma (1)57 visiteDallo spazio di Saturno, una sequenza di 4 frames che, se da un lato ci ricorda la procedura di allineamento e messa a fuoco delle telecamere della Sonda Cassini (frames 1 e 2), da un altro punto di vista ci richiama alla mente immagini misteriose, inesplicabili e, forse, anche un pizzico inquietanti (frames 3 e 4).
Che cosa stiamo guardando? Una stella lontana, uno delle tante Lune di Saturno o...Che cosa?
Original caption:"W00012847.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 CL1 and BL1 filters. This image has not been validated or calibrated".
(3 voti)
|
|
Saturn-PIA07669.jpgSaturn and Dione56 visiteIn this magnificent view, delicate haze layers high in the atmosphere encircle the oblate figure of Saturn. A special combination of spectral filters used for this image makes the high haze become visible. A methane-sensitive filter (centered at 889 nnmts) makes high altitude features stand out, while a polarizing filter makes small haze particles appear bright.
Methane in the atmosphere absorbs light with wavelengths around 889 nnmts as it travels deeper into the Gas Planet, thus bright areas in this image must represent reflective material at higher altitudes.
Small particles or individual molecules scatter light quite effectively to a polarization of 90°, which this polarizing filter is sensitive to. Thus, high altitude haze layers appear bright in this view.
The small blob of light at far right is Dione.
The image was taken with the Cassini spacecraft wide-angle camera on Dec. 5, 2005, at a distance of approx. 2,9 MKM (1,8 MMs) from Saturn and at a phase angle of 100°. The image scale is 169 Km per pixel.
(3 voti)
|
|
Dione-N00047220.jpgDione96 visiteOriginal caption:"N00047220.jpg was taken on December 24, 2005 and received on Earth December 24, 2005. The camera was pointing toward DIONE that, at the time, was approximately 435.332 Km away.
The image was taken using the CL1 and CL2 filters".
(3 voti)
|
|
Dione-PIA07658.jpgCutting Dione...75 visiteDione is partly occulted by Saturn's Rings in this nearly edge-on view, taken from less than 1/10th of 1° above the Ring-Plane. The side of the Rings nearer to the Cassini spacecraft was masked by Saturn's shadow at the time and appears dark.
Bright, wispy fractures on Dione's trailing Hemisphere curl around the horizon. Sunlit terrain seen on Dione is on the moon's Saturn-facing Hemisphere.
North is up.
The image was taken in infrared light (centered at 752 nanometers) with the Cassini spacecraft narrow-angle camera on Nov. 3, 2005 at a distance of approximately 2.5 million kilometers (1.5 million miles) from Dione and at a Sun-Dione-spacecraft, or phase, angle of 109 degrees. Resolution in the original image was 15 kilometers (9 miles) per pixel.
(3 voti)
|
|
Saturn-PIA07772.jpgThe Light Colors of Saturn58 visiteFew sights in the Solar System are more strikingly beautiful than softly hued Saturn embraced by the shadows of its stately Rings. The gas Planet's subtle Northward gradation from gold to azure is a striking visual effect that scientists don't fully understand.
Current thinking says that it may be related to seasonal influences, tied to the cold temperatures in the Northern (winter) Hemisphere. Despite Cassini's revelations, Saturn remains a world of mystery. Currently, the Rings' shadows shield the mid-northern latitudes from the harshest of the Sun's rays. As Saturn travels around the Sun in its 29-year orbit, the shadows will narrow and head southward, eventually blanketing the opposite hemisphere.
Images taken with blue, green and red spectral filters were used to create this color view, which approximates the scene as it would appear to the human eye. The view was brightened to enhance detail visible in the rings and within their shadows.
(3 voti)
|
|
The Rings & Rhea-PIA07655.jpgThe F-Ring and crescent Rhea59 visiteThe searing arc of light seen here is Saturn's icy F-Ring, seen nearly edge-on. In the background, Rhea is lit by reflected light from Saturn and the Rings, with only the slightest sliver of light at its bottom being from direct Sunlight.
The faint material surrounding the F-Ring likely lies in the Planet's equatorial plane, extending radially farther out and in from the main F-Ring core.
A smaller fraction of this material could be vertically extended, and Cassini's investigations should help to clarify this.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Oct. 30, 2005, at a distance of approximately 689.000 Km (about 428.000 miles) from Saturn. The image scale is approximately 4 Km (2 miles) per pixel.
(3 voti)
|
|
Saturn-N00044405.jpgPhotographic Defect, Photo-Artifact or UFO in-transit? (3)58 visitevedi il commento al frame precedente
(3 voti)
|
|
| 2244 immagini su 187 pagina(e) |
 |
|
|
|
|
142 | |
|
|
|
|
