Saturn: the "Ringed Beauty" and His Moons
|
|
|
Janus-N00114756.jpgRugged Janus and various image-artifacts (MULTISPECTRUM-2; credits: Lunexit)54 visiteCaption NASA:"N00114756.jpg was taken on June 30, 2008 and received on Earth July 01, 2008.
The camera was pointing toward JANUS that, at the time, was approx. 32.994 Km away and the image was taken using the CL1 and CL2 filters.
This image has not been validated or calibrated".MareKromium
|
|
Janus-N00114757.jpgRugged Janus and various image-artifacts (MULTISPECTRUM-2; credits: Lunexit)53 visiteCaption NASA:"N00114757.jpg was taken on June 30, 2008 and received on Earth July 01, 2008.
The camera was pointing toward JANUS which, at the time, was approx. 33.205 Km away and the image was taken using the CL1 and MT2 filters.
This image has not been validated or calibrated".MareKromium
|
|
Janus-N00141745to56.gifIn the shadow of Saturn... (GIF-Movie; credits: Dr M. Faccin)54 visitenessun commentoMareKromium
|
|
Janus-PCF-LXTT.jpgJanus (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit team)89 visitenessun commentoMareKromium
|
|
Janus-PIA06603.jpgJanus and Atlas90 visiteCaption NASA originale:"The irregularly-shaped moon Janus (181 Km across) and the small ring moon Atlas (32 Km across) had just emerged from the darkness of Saturn's shadow when Cassini caught this view of the two moons.
Saturn's bright A-Ring is largely overexposed in this view, but several other ring details are nicely visible. The image shows two bright regions within the B-Ring (at right), ringlets of material within the dark, narrow Encke Gap and kinks in the F-Ring.
North on Saturn is tilted toward upper left. This view is from Cassini's vantage point beneath the ring plane. It is notable that, as Saturn orbits the Sun, its shadow has been steadily creeping farther out along the ring plane and now extends beyond the F-Ring. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Jan. 26, 2005, at a distance of approximately 3,2 MKM from Janus and at a phase angle of 81°. The image scale is 19Km/pixel".
|
|
Janus-PIA06612.jpgJanus rides the Rings53 visiteCaption NASA originale:"Cassini was nearly in the plane of Saturn's Rings when it took this image of Janus. The nearly edge-on rings appear almost ribbon-like in this view and some surface detail is visible on the small moon. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 18, 2005, at a distance of approximately 911.000 Km from Janus and at a phase angle of 101°. The image scale is 5 Km per pixel".
|
|
Janus-PIA06613.jpgJanus (close-up)53 visiteCaption NASA originale:"This close-up view of Saturn's moon Janus shows what appear to be two large craters near the boundary between day and night. The left side of the moon is lit feebly by reflected light from Saturn. Janus is 181 Km across.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 18, 2005, at a distance of approximately 1,1 MKM from Janus and at a phase angle of 108°. Resolution in the original image was 7 Km (approx. 4 miles) per pixel. The image has been contrast-enhanced and magnified by a factor of three to aid visibility".
|
|
Janus-PIA07529.jpgJanus from 357.000 Km54 visiteThis close-up look at Saturn's moon Janus reveals spots on the moon's surface which may be dark material, maybe exposed by impacts. If the dark markings within bright terrain are indeed impact features, then Janus' surface represents a contrast with that of Saturn's moon Phoebe, where impacts have uncovered bright material beneath a darker overlying layer. Recent theories say also that Janus may be a porous body, composed mostly of water ice.
This image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 20, 2005, at a distance of approx. 357.000 Km (about 222.000 miles) from Janus and at a Sun-Janus-spacecraft, or phase, angle of 6°. Resolution in the original image was 2 Km (about 1,3 miles) per pixel. The view was magnified by a factor of two and contrast-enhanced to aid visibility of the moon's surface".
|
|
Janus-PIA07580.jpgJanus54 visiteOriginal NASA caption:"The Roman god Janus is usually depicted with two faces (nota: "Giano Bifronte"), one looking forward and one behind. Janus is captured here by Cassini, showing two faces of its own.
This view shows a sliver of Janus's dayside, plus much of the dark side. Part of the darkened terrain to the left is lit dimly by reflected light from Saturn, revealing craters there.
North on Janus is up in this image. A brightly sunlit view of Janus (181 Km, or 113 miles across) can also be seen in PIA07529.
The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on Aug. 2, 2005, at a distance of approx. 541.000 Km (about 336.000 miles) from Janus and at a Sun-Janus-spacecraft, or phase, angle of 147°. Resolution in the original image was 3 Km (about 2 miles) per pixel.
The image has been contrast-enhanced and magnified by a factor of two to aid visibility".
|
|
Janus-PIA07615.jpgJanus and Epimetheus54 visiteOriginal caption:"Outside the soft edge of Cassini's F-Ring, Epimetheus and Janus negotiate their nearly-shared orbit. The two moons' orbits are typically about 50 Km (approx. 30 miles) apart, and the moons actually change orbits every few years: one moon becoming the innermost of the pair, the other becoming the outermost.
Epimetheus' diameter is 116 Km while Janus' diameter is 181 Km across.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 8, 2005, at a distance of approx. 1,5 MKM (about 1 MMs) from Saturn. The image scale is about 11 Km (roughly 7 miles) per pixel on the two moons".
|
|
Janus-PIA07663.jpgBrothers-in-arms, Brothers-in-light53 visiteEpimetheus (116 Km - about 72 miles - across, at right) and Janus (181 Km - about 113 miles - across, at left) are lit here by reflected "greylight" from Saturn. The Sun brightens only thin slivers of the moons' surfaces.
A few large craters on Janus are visible in the dim light of Saturn.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Nov. 29, 2005 a distance of approximately 1,1 MKM (about 700.000 miles) from both moons. Resolution in the original image was 7 Km (about 4 miles) per pixel. The image has been magnified by a factor of two and contrast-enhanced to aid visibility.
|
|
Janus-PIA08169.jpgJanus and the Rings53 visiteCaption NASA originale:"Janus peeks out from beneath the Ring-Plane, partially lit here by reflected light from Saturn. A couple of craters can be seen on the moon's surface. To the right, two faint clumps of material can be seen in the dynamic F-Ring.
The perspective in this view may be a bit confusing -- from just below the Ring-Plane, Cassini is gazing toward Janus (181 Km, or 113 miles across), which is behind the Rings.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on March 16, 2006, at a distance of approx. 2,1 MKM (such as about 1,3 MMs) from Janus and at a Sun-Janus-spacecraft, or phase, angle of 103°. Image scale is approx. 12 Km (about 8 miles) per pixel".
|
|
| 2245 immagini su 188 pagina(e) |
 |
|
|
|
|
61 | |
|
|
|
|
