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New Horizons at Europa
Guest_AlexBlackwell_*
post Feb 27 2007, 09:31 PM
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Time to start a thread about a far more interesting jovian moon biggrin.gif

Passing probe to study 'crop circles' on Europa
17:38 27 February 2007
NewScientist.com news service
Kelly Young
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dvandorn
post Mar 4 2007, 02:17 AM
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I speculate that Europa simply cannot be emitting anything more than a tiny fraction of the mass that Enceladus is emitting (if any at all), or else the Voyagers and Galileo would have observed the ring/torus of particles that such outgassing would create. Assuming, of course, that geysers on Europa would propel particles fast enough to escape its gravity and form a ring in the first place...

But, I mean, really -- the smoke ring created by Enceladus is noticeable enough that, if there was such a ring at Europa's orbit, it would have been discovered by now (as, for example, the sulphur torus at Io's orbit was discovered fairly early on).

-the other Doug


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“The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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- AlexBlackwell   New Horizons at Europa   Feb 27 2007, 09:31 PM
- - ugordan   As mentioned in the general NH at Jupiter thread, ...   Feb 28 2007, 12:58 PM
- - AlexBlackwell   Thanks, Gordan. Now we're getting somewhere...   Feb 28 2007, 04:10 PM
|- - Bjorn Jonsson   QUOTE (ugordan @ Feb 28 2007, 12:58 PM) A...   Feb 28 2007, 09:01 PM
|- - J.J.   QUOTE (Bjorn Jonsson @ Feb 28 2007, 03:01...   Feb 28 2007, 09:29 PM
|- - AlexBlackwell   QUOTE (Bjorn Jonsson @ Feb 28 2007, 11:01...   Feb 28 2007, 09:52 PM
||- - SFJCody   QUOTE (AlexBlackwell @ Feb 28 2007, 09:52...   Feb 28 2007, 10:28 PM
|- - JRehling   QUOTE (Bjorn Jonsson @ Feb 28 2007, 01:01...   Feb 28 2007, 10:51 PM
|- - JRehling   The NH snap of Europa has similar geometry to the ...   Mar 1 2007, 05:46 PM
- - djellison   Several "Oh woe is me" posts in this thr...   Mar 1 2007, 04:46 PM
- - mgrodzki   i know there is much more to come when NH turns to...   Mar 3 2007, 03:55 AM
|- - stevesliva   QUOTE (mgrodzki @ Mar 2 2007, 10:55 PM) b...   Mar 3 2007, 04:37 AM
- - nprev   Hmm...Actually, that's a very good question, M...   Mar 3 2007, 04:35 AM
- - mgrodzki   that seems pretty meaty for a quick swing. most ex...   Mar 3 2007, 01:42 PM
|- - nprev   QUOTE (mgrodzki @ Mar 3 2007, 05:42 AM) m...   Mar 3 2007, 03:01 PM
- - MarcF   New Horizons is also supposed to map the intriguin...   Mar 3 2007, 02:13 PM
- - dvandorn   I speculate that Europa simply cannot be emitting ...   Mar 4 2007, 02:17 AM
- - Decepticon   QUOTE the sulphur torus at Io's orbit was disc...   Mar 4 2007, 04:23 AM
|- - dvandorn   Voyager flybys, as I recall. I'm just thinkin...   Mar 4 2007, 05:29 AM
|- - scalbers   QUOTE (Decepticon @ Mar 4 2007, 04:23 AM)...   Mar 4 2007, 03:33 PM
- - edstrick   Somebody do the arithmetic... What is the escape ...   Mar 4 2007, 08:40 AM
- - helvick   Surface escape speed at Enceladus ~ 239 m/sec. Sur...   Mar 4 2007, 10:11 AM
|- - mgrodzki   QUOTE (helvick @ Mar 4 2007, 05:11 AM) I ...   Mar 4 2007, 02:29 PM
|- - helvick   QUOTE (mgrodzki @ Mar 4 2007, 02:29 PM) i...   Mar 4 2007, 07:24 PM
- - nprev   Actually, IIRC, the Io torus, Saturn's E-ring,...   Mar 4 2007, 03:40 PM
|- - vexgizmo   QUOTE (nprev @ Mar 4 2007, 08:40 AM) The ...   Mar 4 2007, 05:26 PM
- - nprev   Ho, ho!!! VERY interesting, Vexgizmo, ...   Mar 4 2007, 07:30 PM
- - helvick   Well they seem pretty certain that Jovian environm...   Mar 4 2007, 09:23 PM
- - nprev   Mmm...yeah, probably. Still, I remember that Io...   Mar 4 2007, 09:51 PM
- - tim cassidy   On comparing Enceladus and Io: The torus of partic...   Mar 5 2007, 05:00 PM
- - elakdawalla   There's now 7 separate Europa observations up ...   Mar 29 2007, 09:58 PM
- - volcanopele   Very cool, Emily. Going off your idea, I've c...   Mar 30 2007, 05:40 AM
|- - alan   QUOTE (volcanopele @ Mar 30 2007, 12:40 A...   Mar 30 2007, 07:42 AM
|- - ugordan   QUOTE (volcanopele @ Mar 30 2007, 06:40 A...   Mar 30 2007, 08:47 AM
|- - elakdawalla   QUOTE (volcanopele @ Mar 29 2007, 10:40 P...   Mar 30 2007, 02:44 PM
- - john_s   I think we'll need to subtract out the albedo ...   Mar 30 2007, 04:00 PM
|- - ugordan   QUOTE (john_s @ Mar 30 2007, 05:00 PM) I ...   Mar 30 2007, 05:40 PM
- - Phil Stooke   This image is a comparison between a NH image of E...   Apr 2 2007, 12:57 PM
- - punkboi   New image of Io and Europa next to each other in M...   Apr 2 2007, 05:59 PM
- - John Flushing   RE: New Horizons at Europa   Apr 2 2007, 06:06 PM
- - ugordan   Beautiful! QUOTE This particular scene was su...   Apr 2 2007, 06:08 PM
- - helvick   And a shout out to Hendric too in the comments, th...   Apr 2 2007, 06:10 PM
|- - John Flushing   QUOTE (helvick @ April 2nd 2007, 02:10 PM...   May 2 2007, 12:52 AM
- - paxdan   Kudos to hendric and kudos to the new horizon team...   Apr 2 2007, 06:24 PM
- - hendric   Ah man, I didn't do anything except run a few ...   Apr 2 2007, 09:13 PM
- - djellison   Major major kudos to Alan, John and Space Enthusia...   Apr 2 2007, 09:35 PM
|- - JRehling   QUOTE (djellison @ Apr 2 2007, 02:35 PM) ...   Apr 2 2007, 09:50 PM
- - john_s   Yes, thanks to Doug, UMSF and Hendric in particula...   Apr 3 2007, 04:08 AM
- - martin peters   QUOTE (john_s @ Apr 3 2007, 04:08 AM) Esp...   Apr 3 2007, 06:19 AM


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