Saturn's Rings To Shine As Never Before |
Saturn's Rings To Shine As Never Before |
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Sep 17 2006, 11:11 PM
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#16
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Why would they downsample all the images to 512x512 or less?
EDIT: OK I found one that I hoped would be full size: http://saturn.jpl.nasa.gov/multimedia/imag...eiImageID=83290 http://saturn.jpl.nasa.gov/multimedia/imag...eiImageID=83288 |
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Sep 18 2006, 12:16 AM
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#17
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
Tethys's shadow is visible in the E-ring
Cropped and brightened for this image. http://saturn.jpl.nasa.gov/multimedia/imag...eiImageID=83289 |
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Sep 18 2006, 02:42 AM
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#18
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Member Group: Members Posts: 477 Joined: 2-March 05 Member No.: 180 |
Vision of dream... Note : we see clearly the shadow of the secondary miror of the objective of the camera on the first pic. This image is simply incredible. |
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Sep 18 2006, 05:19 AM
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#19
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
Is this a new (albeit very faint) ring between the F and G rings?
Could this become known as the H-ring? http://saturn.jpl.nasa.gov/multimedia/imag...3/W00017882.jpg Ian. -------------------- |
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Sep 18 2006, 05:36 AM
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#20
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Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
Wow!!!!!
It occurs to me that if we had gotten images from this vantage point early in the orbital phase of the mission, there would have been no doubt whatsoever that Enceladus is the source of the E ring. You can see the ring material flowing off of Enceladus and smoothing itself into the ring quite clearly. Amazing, amazing images. As someone said nearly 40 years ago of a somewhat similar view of the Moon, it's worth the price of the trip. -the other Doug -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Sep 18 2006, 06:50 AM
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#21
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Note : we see clearly the shadow of the secondary miror of the objective of the camera on the first pic. Nope, that's a wide-angle camera frame. It's a refractor so it doesn't have mirrors. What we're seeing here is possibly the finest image of the calibration lamp and its three supporting rods in front of the optics. Alan, that Tethys shadow image is awesome, nice catch! Also, did you notice the complex pattern of the E ring just in the vicinity of Enceladus ("conveniently" caught just at the ring's ansa)? It looks very disturbed. EDIT: On closer inspection, it's notable the disturbance in the E ring is similar to what Daphnis does. Cassini is above the ring plane (all the images are upside-down) so the orbital motion is counter-clockwise. This implies the ring particles in the inner side have advanced further along their orbit, after being perturbed by Enceladus. The outer edge perturbance is lagging behind the moon. Thus the "wave-like" appearance, though it's not nearly as orderly as with Daphnis, probably because the E ring isn't as confined and is also spread-out vertically. Enceladus is also much more massive than the ring-embedded moons. This post has been edited by ugordan: Sep 18 2006, 12:35 PM -------------------- |
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Sep 18 2006, 06:59 AM
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#22
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
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Sep 18 2006, 11:11 AM
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#23
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Tethys's shadow is visible in the E-ring Really a good catch, alan. Herebelow, a processed version of your cropped area within the original context image... -------------------- I always think before posting! - Marco -
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Sep 18 2006, 12:33 PM
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#24
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Member Group: Members Posts: 288 Joined: 28-September 05 From: Orion arm Member No.: 516 |
Hi,
wow really impressive pics!!! Does anybody know a link for a larger version of this overview... ...of the mosaik? I'm just asking for indentification purposes of all these objects around Saturn - its moons and the visible 'inner planets'. THX & Bye. |
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Sep 18 2006, 12:50 PM
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#25
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Really a good catch, alan. Herebelow, a processed version of your cropped area within the original context image... ...and this is the rgb composition of the same field (with lower exposure time); there isn't Thetys's shadow but show the amazing Enceladus envelope: An alternative view of the E/G rings with "extended range" colors (ir3+clear+violet filters), suggesting a compositional difference between inner and outer E ring and respect to G ring: Finally, this is a collection of "high dynamic range" images based on the combination of 3 clear filter pictures taken with different exposure time (red channel correspond to the weakest details): -------------------- I always think before posting! - Marco -
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Sep 18 2006, 12:57 PM
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#26
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
Is this a new (albeit very faint) ring between the F and G rings? Could this become known as the H-ring? http://saturn.jpl.nasa.gov/multimedia/imag...3/W00017882.jpg Ian. Good eyes. The "H-ring" looks like its at the same distance as Janus and Epimeteus. |
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Sep 18 2006, 01:17 PM
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#27
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
An alternative view of the E/G rings with "extended range" colors (ir3+clear+violet filters), suggesting a compositional difference between inner and outer E ring and respect to G ring: That's a nice view! I'm more inclined to say it doesn't mean compositional differences as much as variations in average ice particle size - the smaller the particles, the more shorter wavelengths are scattered and the ring appears bluish. Though, the result here will be less useful as we don't know the different exposures used and thus relative brigthnesses at different wavelengths. -------------------- |
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Sep 18 2006, 04:58 PM
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#28
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Senior Member Group: Members Posts: 1619 Joined: 12-February 06 From: Bergerac - FR Member No.: 678 |
Two pictures to add into this spectacular Cassini gallery.
Sun eclipse by Saturn at different exposures : And the "Pitch Black Like" scenery with three other images : That's a little science fiction rendering. -------------------- |
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Sep 18 2006, 06:02 PM
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#29
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
That's a nice view! I'm more inclined to say it doesn't mean compositional differences as much as variations in average ice particle size Absolutely agree. In fact, I was speaking not only of chemical composition but also (and especially) dimensional composition. Such differences were already highlighted inside main rings, now are evident also here due to favorable illumination. Note that the bluish color of internal E-ring is barely visible also in the rgb image. This suggests that finer particles populates this region (eventually spiraling toward Saturn)... any idea on the dynamic of this segregation? -------------------- I always think before posting! - Marco -
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Sep 18 2006, 06:09 PM
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#30
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Ant103, great work!
Is really a little science fiction rendering! If I'm not wrong, in the second (coulor) image I see some bright, long features inside the Enke division... Do someone has any idea on their origin? -------------------- I always think before posting! - Marco -
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