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NASA Briefs Preliminary Plume Findings from Moon Mission
briv1016
post Nov 10 2009, 09:26 PM
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http://www.nasa.gov/home/hqnews/2009/nov/H...S_briefing.html
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stewjack
post Nov 12 2009, 05:43 PM
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NASA TV Schedule

November 13, Friday
10 a.m. - Countdown Status Briefing - KSC (Public and Media Channels)
11 a.m. - ISS Expedition 21 Commentary - JSC (Public and Media Channels)
12 p.m. - LCROSS Science News Briefing AMES (Public and Media Channels)

12 PM Eastern U.S. time = 17:00 GMT/UTC
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Holder of the Tw...
post Nov 13 2009, 04:59 PM
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News conference is ready to start right now.

Edit: Water!
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Phil Stooke
post Nov 13 2009, 05:08 PM
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NIR pic of the crater - nice!

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Holder of the Tw...
post Nov 13 2009, 05:21 PM
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Infrared detection of water vapor and ice, ultraviolet detection of hydroxyl (OH). Lower limit of about 100 kg of water was detected. "Twelve buckets full". "Other stuff" found, too. No word yet on what.

Edit 38 minutes past the hour - CH type molecules present (possibilities are methane, CO2, etc.)
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glennwsmith
post Nov 13 2009, 05:45 PM
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Cool!!!!!!!!!!!

And now I gotta run over to the "Earthlike Mars" thread to proclaim that there is almost certainly a frozen Oceanus Borealis under the dust of the northern plains of Mars!!!!
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bugs_
post Nov 13 2009, 07:10 PM
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Congratulations LCROSS team. Incredible. You guys sent up your own plume today!
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Webscientist
post Nov 13 2009, 07:45 PM
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Great News from this not so boring moon!

Is this frozen water the outcome of a meteoritic or cometary impact?
Or is it the "ice tip of the iceberg"?
I'm in favour of the second hypothesis.

If confirmed, why not imagining a network of caves made of liquid water somewhere in the underground!
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remcook
post Nov 13 2009, 07:52 PM
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Cool! smile.gif
Did they say why the hydroxyl signal levels went below the baseline in the end of that plot (bottom one here http://www.nasa.gov/mission_pages/LCROSS/m...lts_images.html )? Just curious...
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Juramike
post Nov 13 2009, 08:40 PM
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QUOTE (Holder of the Two Leashes @ Nov 13 2009, 12:21 PM) *
Edit 38 minutes past the hour - CH type molecules present (possibilities are methane, CO2, etc.)


CO2 won't have any C-H stretches.

Can someone post a link for that update?


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ustrax
post Nov 13 2009, 08:45 PM
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From the press release: "there are hints of other intriguing substances"
http://www.nasa.gov/mission_pages/LCROSS/m...er_results.html

Colaprete at the conference: "and there's a whole lot more beyond the water so that's the exciting part in my mind, it's not only about the water, there's actually a lot more here that we're gonna be talking about in the months ahead looking" with the guy on his left with a monalisesque smile in his face...hmm...almost gives me the impression that they happier about that "extra" smile.gif
http://www.youtube.com/watch?v=QOpXMJdZGHc..._embedded#at=54

What can it be? Did I miss the answer to this?



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nprev
post Nov 13 2009, 08:47 PM
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Apparently, there's evidence of at least simple organics, Rui. Perhaps that might bolster the cometary origin hypothesis, or imply capture of lunar outgassing products.


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P Hayne
post Nov 13 2009, 09:06 PM
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QUOTE (remcook @ Nov 13 2009, 11:52 AM) *
Did they say why the hydroxyl signal levels went below the baseline in the end of that plot (bottom one here http://www.nasa.gov/mission_pages/LCROSS/m...lts_images.html )? Just curious...

The hydroxyl band is seen in emission, so the drop below the baseline at the end is likely due to the fact that the shepherding spacecraft (SSC) passed through the plume, and was no longer picking up emission from the illuminated ejecta. A negative "band strength" probably just reflects the fact that the overall emission was dropping as the SSC dropped into the darkness of Cabeus.
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Holder of the Tw...
post Nov 13 2009, 10:01 PM
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QUOTE (Juramike @ Nov 13 2009, 02:40 PM) *
CO2 won't have any C-H stretches. Can someone post a link for that update?


I mentioned it that way because that was how it was presented. Thirty-seven or so minutes into the briefing the question was asked about what else besides water. The fellow mentions "CH type" substances, and rattles off a list of possibilities in which carbon dioxide was included. Methane was another (I guess between it and CO2 you get an average of two), and methanol was also mentioned. I believe the possiblility of some kind of sulfur compound was raised, I can't remember the exact substance.
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ngunn
post Nov 13 2009, 10:23 PM
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Before the specific mention of methane as a 'possibility' there was a comment about having found substance(s) that would evaporate at temperatures just 20-30 degrees warmer than ambient ground temperatures of -220C or -230C, possibly sublimed off a wider area around the crater by falling warm debris. Methane has a boiling point in this range - but are there other candidates?
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