Enceladus Jet Sources |
Enceladus Jet Sources |
Oct 10 2007, 05:20 PM
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
New press release by the imaging team:
Cassini Pinpoints Hot Sources of Jets on Enceladus October 10, 2007 (Source: Space Science Institute) CICLOPS link to the release here. One thing I was curious about tiger stripe naming - why didn't they switch "Baghdad" and "Cairo" so we have a nice A,B,C,D progression? I can only imagine it was done on purpose, but why? -------------------- |
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Apr 9 2010, 05:48 AM
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Senior Member Group: Moderator Posts: 3241 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
I doubt it. I suspect they are more related to the rough topography, outcrops or boulders, than with cryovolcanism.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 8 2010, 11:04 PM
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
I suppose this is a good place to post this... I just finished up a color version of this observation and it turned out to have two bonuses to it I wasn't aware of. One is that Enceladus' shadow on the E-ring is faintly visible, a rare sight. The second one is the reason why I'm posting this. There's what looks like a dome above the plumes. If you look real closely at the (contrast-enhanced) image below you can pick it up as a discrete change in plume brightness gradient about 1 Enceladus radius above the south pole.
My initial reaction was that this had to be some kind of artifact, but now I'm not so sure. It's visible in at least 3 clear filter frames and a red and blue frame. Moreover, the position of Enceladus was different in the color frames and the feature still follows it, suggesting it's not an optics scattered light effect from Saturn or something (Cassini was in eclipse at that point IIRC, anyway). Here's a natural-ish color R+B image and a heavy unsharp enhancement. It looks like a bow shock in the plume but my gut says the whole thing is too diffuse for that. What do you think? Artifact or real? -------------------- |
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