July 20 2007 icy moon images (rev 48) |
Unmanned Spaceflight.com > Outer Solar System > Saturn > Cassini Huygens > Cassini's ongoing mission and raw images  |
July 20 2007 icy moon images (rev 48) |
 Jul 22 2007, 02:41 PM
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 Senior Member  Group: Members Posts: 1620 Joined: 20-November 04 From: Iowa Member No.: 110  |
Latest Tethys and Enceladus images are up
http://saturn.jpl.nasa.gov/multimedia/imag...0&storedQ=0 |
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Jul 22 2007, 03:35 PM
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 Member Group: Members Posts: 738 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Looks like some new details on Tethys north of Melanthius...
-------------------- Steve [ my planetary maps page ]
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Jul 22 2007, 06:34 PM
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Member Group: Members Posts: 154 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
Finally some sharper views of the great Odysseus basin !
http://saturn.jpl.nasa.gov/multimedia/imag...2/N00086709.jpg Marc. |
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Jul 23 2007, 02:16 AM
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 SewingMachine Group: Members Posts: 293 Joined: 27-September 05 Member No.: 510 |
Woohoo! Very nice set this pass, and scads of new and better-defined detail north of Melanthius to concur with Steve. Quick-an' filthy summary here:
-------------------- ...if you don't like my melody, i'll sing it in a major key, i'll sing it very happily. heavens! everybody's all aboard? let's take it back to that minor chord...
Galileo Flickr Gallery |
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Jul 23 2007, 04:07 AM
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 Senior Member Group: Moderator Posts: 6474 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Whoo-hoo! EC's back, layin' down the phat montages old-school...long time no perceive, don't be gone like that no more, yo!
Tethys looks more and more interesting. Confess that I don't know the nomenclature, but that rather 'lengthy' central peak in that large crater is intriguing...busted open a fault, maybe? Certainly merits futher examination. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Jul 23 2007, 06:52 AM
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#6
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Senior Member Group: Members Posts: 1869 Joined: 20-February 05 Member No.: 174 |
In the "Pedantic Quibbles Department"...
"Finally some sharper views of the great Odysseus basin !" Is it a "basin" if the floor is essentially everywhere convex? (It may be a basin in relation to the Tethyian geoid, of course) |
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Jul 23 2007, 01:42 PM
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#7
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 Bloggette par Excellence Group: Admin Posts: 3958 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
I say, if you walk downhill to get to the middle and uphill to get to the edge, it's a basin, no matter what it looks like from orbit! The smaller the body, the weirder the basins -- most of Itokawa's basins appear noticeably convex from above, but they are "holes" as far as local gravity is concerned.
--Emily -------------------- |
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Jul 23 2007, 03:15 PM
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#8
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Member Group: Members Posts: 216 Joined: 13-October 05 Member No.: 528 |
If using an Earth based term like "basin" on Tethys seems wrong, using it to describe features on a rubble pile like Itakowa is even furthur out of the park.
Even weirder to me was the Japanese naming one of the features on Itokawa the "Muses Sea". Although I grant you it occured to me that perhaps it was an in joke, since the Hayabusa mission was originally called "Muses C" if I recall correctly. I think a new nomenclature is needed. Of course, only a handful of people on Earth would ever learn it, so maybe it would just make things even more difficult than they already are. |
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Jul 23 2007, 04:14 PM
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Senior Member Group: Members Posts: 4507 Joined: 5-April 05 From: Canada Member No.: 227 |
No, a new nomenclature is not needed! Rules of supposed logic can't be applied backwards down the line of an evolving disciplinary jargon. A basin in this context is a multi-ringed impact structure, it has nothing to do with its depth. Just as the word 'crater', originally meaning a cup, and applied to cup-shaped depressions on the Moon and Earth, can be applied to Wargentin (on the Moon) despite it being filled to the rim.
Phil -------------------- ... because the Solar System ain't gonna map itself.
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Jul 23 2007, 05:19 PM
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#10
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Member Group: Members Posts: 154 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
When I used the term "basin" for Odysseus I meant "giant impact scar".
Sorry if I misused the word. However, I would agree with Phil when he says that it has nothing to do with its depth. Just as an example, Valhalla and Asgard on Callisto are also called basins and are almost flat. I think there are plenty of such examples in our solar system. Marc. |
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Jul 23 2007, 05:34 PM
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 Senior Member Group: Moderator Posts: 2816 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Exactly, Phil. What is a patera on Io isn't necessarily the same on Mars, or Venus, or Titan. Same goes with Lacus for Titan and the Moon.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Jul 23 2007, 07:59 PM
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#12
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Member Group: Members Posts: 154 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
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Jul 23 2007, 08:16 PM
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#13
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Senior Member Group: Moderator Posts: 2816 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Tis an overexposed image of Rhea
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Jul 24 2007, 07:01 AM
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#14
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Senior Member Group: Members Posts: 1869 Joined: 20-February 05 Member No.: 174 |
<grin>
Pedantic quibbles can stir up an interesting... and relevant... discussion! |
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Jul 24 2007, 05:42 PM
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#15
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Junior Member Group: Members Posts: 53 Joined: 8-November 06 From: Indiana, USA Member No.: 1337 |
New Hyperion images are in.
There is a great crater with a central peak visible. I never knew it existed. |
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