New Horizons at Europa |
New Horizons at Europa |
Guest_AlexBlackwell_* |
Feb 27 2007, 09:31 PM
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#1
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Time to start a thread about a far more interesting jovian moon
Passing probe to study 'crop circles' on Europa 17:38 27 February 2007 NewScientist.com news service Kelly Young |
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Feb 28 2007, 12:58 PM
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#2
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Senior Member Group: Members Posts: 3652 Joined: 1-October 05 From: Croatia Member No.: 523 |
As mentioned in the general NH at Jupiter thread, the first Europa image is down.
http://pluto.jhuapl.edu/gallery/missionPho...s/022807_2.html -------------------- |
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Guest_AlexBlackwell_* |
Feb 28 2007, 04:10 PM
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#3
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Thanks, Gordan. Now we're getting somewhere!
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Feb 28 2007, 09:01 PM
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#4
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IMG to PNG GOD Group: Moderator Posts: 2256 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
As mentioned in the general NH at Jupiter thread, the first Europa image is down. http://pluto.jhuapl.edu/gallery/missionPho...s/022807_2.html And this is the viewing geometry: I'm a bit frustrated that these are probably the best images we'll be seeing of the Galileans until the 2020s or later (except possibly for occasional images from huge future Earth-based telescopes). Having seen Cassini at Saturn as compared to Galileo at Jupiter makes me wish there was a 'Galileo 2' or something comparable. |
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Feb 28 2007, 09:29 PM
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#5
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Junior Member Group: Members Posts: 94 Joined: 22-March 06 Member No.: 722 |
And this is the viewing geometry: I'm a bit frustrated that these are probably the best images we'll be seeing of the Galileans until the 2020s or later (except possibly for occasional images from huge future Earth-based telescopes). Having seen Cassini at Saturn as compared to Galileo at Jupiter makes me wish there was a 'Galileo 2' or something comparable. No guff. I had the same kind of wistful thought when I saw that Europa image--the last close-up of my favorite satellite for a long time... -------------------- Mayor: Er, Master Betty, what is the Evil Council's plan?
Master Betty: Nyah. Haha. It is EVIL, it is so EVIL. It is a bad, bad plan, which will hurt many... people... who are good. I think it's great that it's so bad. -Kung Pow: Enter the Fist |
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Guest_AlexBlackwell_* |
Feb 28 2007, 09:52 PM
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#6
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Guests |
I'm a bit frustrated that these are probably the best images we'll be seeing of the Galileans until the 2020s or later (except possibly for occasional images from huge future Earth-based telescopes). Probably. However, crude as they might be, I wonder if JunoCam or the imagers on NASA's proposed Solar Probe, which is baselined for a 2015 Jupiter gravity assist, might return something useful. |
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Feb 28 2007, 10:28 PM
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#7
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Member Group: Members Posts: 813 Joined: 8-February 04 From: Arabia Terra Member No.: 12 |
Probably. However, crude as they might be, I wonder if JunoCam or the imagers on NASA's proposed Solar Probe, which is baselined for a 2015 Jupiter gravity assist, might return something useful. It's a longshot but maybe one of the emerging planetary spacecraft nations (India or China) will choose the Jupiter system as a target for a flagship. If not, perhaps Russia's newly reborn planetary program will take on a mission that goes further than Mars orbit. |
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Feb 28 2007, 10:51 PM
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#8
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
And this is the viewing geometry: Thanks! This is highly complementary with the geometry Voyager 1 had of Europa, eg: http://photojournal.jpl.nasa.gov/catalog/PIA00016 Maybe an aspiring astrocartographer could normalize the NH image's color to the Voyager one and then make a cylindrical map from this pair. Oh, to have free time! |
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Mar 1 2007, 04:46 PM
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#9
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Founder Group: Chairman Posts: 14448 Joined: 8-February 04 Member No.: 1 |
Several "Oh woe is me" posts in this thread about how we'll all be dead before anything ever happens in space ever again have been deleted. Seriously guys, can you not keep anything on topic?
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Mar 1 2007, 05:46 PM
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#10
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
The NH snap of Europa has similar geometry to the best full-disk image taken by Galileo:
http://photojournal.jpl.nasa.gov/catalog/PIA00502 Most features visible in the NH image are visible here. |
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Mar 3 2007, 03:55 AM
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#11
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Member Group: Members Posts: 121 Joined: 26-September 05 From: Philadelphia Member No.: 507 |
i know there is much more to come when NH turns to face us, but are we expecting to learn anything from the europa images or will it largely be just a few new views in B&W? the images of Io so far seem pretty distant, and that works for Io as it is so active and plumes can be seen from quite a distance. but what might we discover at europa from such a quick pass?
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Mar 3 2007, 04:35 AM
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#12
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Merciless Robot Group: Admin Posts: 8789 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Hmm...Actually, that's a very good question, MG.
Do we obtain any good silhouette views of Europa with low illumination angles at all from NH for a plume search? If there are any, I'm sure they'll be several orders of magnitude less spectacular than Io (or Enceladus, for that matter)...still definitely worth a look, though, if we can get it, particularly because NH is uniquely equipped to observe dim objects.... -------------------- 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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Mar 3 2007, 04:37 AM
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#13
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Senior Member Group: Members Posts: 1598 Joined: 14-October 05 From: Vermont Member No.: 530 |
but what might we discover at europa from such a quick pass? See slides 17-20 of the presentation here: http://www.boulder.swri.edu/~spencer/nhjupitersupport/ Atmosphere and surface composition... |
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Mar 3 2007, 01:42 PM
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#14
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Member Group: Members Posts: 121 Joined: 26-September 05 From: Philadelphia Member No.: 507 |
that seems pretty meaty for a quick swing. most exciting is the remote possibility we may see some emissions at europa as we did at enceladus. that would be fantastic. if that did happen, wouldn’t that almost insure the odds of a flagship mission to europa?
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Mar 3 2007, 02:13 PM
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#15
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Member Group: Members Posts: 241 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
New Horizons is also supposed to map the intriguing arcuate depressions (or "crop circles") by making near terminator imaging. Will the resolution really be high enough to see them ?
Thinking about Europa pictures, I remember that I saw (a long time ago) some small pictures taken by Voyager 2 showing Europa being eclipsed by Jupiter's own shadow (a rare Voyager 2 "Kodak moment"). Has anybody an idea where these pictures could be found ? (Sorry, this question is not directly linked to this thread). Marc. |
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