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Author
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Topic: Rosetta, Philae, Comet 67P & life.
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Tangle
Member Posts: 9504 From: UK Joined: 10-07-2011 Member Rating: 4.8
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Message 1 of 47 (733725)
07-20-2014 12:33 PM
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The Rosetta probe is due to reach Comet 67P on 6th August. Comet 67P is thought to contain water and maybe amino acids. If the probe (and its companion probe, Philae, which will be anchored on the meteor) detects the same ratio of hydrogen and deuterium isotopes as in our oceans it will be pretty solid evidence that it was such meteors that delivered water to our arrid planet after it cooled. Both probes will also scan the comet's gasses looking for amino acids - the 'building blocks of life.' Can't wait..... Close encounter with Comet 67P may reveal origins of life on Earth | Comets | The Guardian
Edited by Tangle, : No reason given.
Life, don't talk to me about life - Marvin the Paranoid Android "Science adjusts it's views based on what's observed. Faith is the denial of observation so that Belief can be preserved." - Tim Minchin, in his beat poem, Storm.
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Admin
Director Posts: 13024 From: EvC Forum Joined: 06-14-2002 Member Rating: 1.9
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Message 2 of 47 (733727)
07-20-2014 5:00 PM
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Thread Copied from Proposed New Topics Forum
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Tangle
Member Posts: 9504 From: UK Joined: 10-07-2011 Member Rating: 4.8
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Message 3 of 47 (734593)
07-31-2014 10:58 AM
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One week away
WOW! We’re really getting to the good stuff now! This is no computer-generated shape model, this is the real deal: the double-lobed nucleus of Comet 67P/C-G, as imaged by Rosetta’s OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) narrow-angle camera on Tuesday, July 29. At the time just about a week away from making its arrival, ESA’s spacecraft was 1,950 km (1,211 miles) from the comet when this image was taken. (That’s about the distance between Providence, Rhode Island and Miami, Florida that’s one fancy zoom lens, Rosetta!) Read more: New Image of Rosetta's Comet Reveals So Much More - Universe Today
Life, don't talk to me about life - Marvin the Paranoid Android "Science adjusts it's views based on what's observed. Faith is the denial of observation so that Belief can be preserved." - Tim Minchin, in his beat poem, Storm.
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herebedragons
Member (Idle past 880 days) Posts: 1517 From: Michigan Joined: 11-22-2009
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Message 4 of 47 (734646)
07-31-2014 11:25 PM
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Reply to: Message 1 by Tangle
07-20-2014 12:33 PM
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Some questions
If the probe ... detects the same ratio of hydrogen and deuterium isotopes as in our oceans it will be pretty solid evidence that it was such meteors that delivered water to our arrid planet after it cooled. What is it that is so special about the ratio of isotopes in our oceans that other sources of water would not be expected to have similar ratios? Why would water need to be "delivered" to our planet? Why could it not have formed in situ ?? Is it just because the earth would have been hot when it formed? Wouldn't that be true of any celestial body... at least at one time? HBD Edited by herebedragons, : add subtitle
Whoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
| This message is a reply to: | | | Message 1 by Tangle, posted 07-20-2014 12:33 PM | | Tangle has not replied |
| Replies to this message: | | | Message 5 by NoNukes, posted 08-01-2014 1:04 AM | | herebedragons has not replied |
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NoNukes
Inactive Member
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Re: Some questions
What is it that is so special about the ratio of isotopes in our oceans that other sources of water would not be expected to have similar ratios? I'm not sure 'special' is the right word, but past measurements of the abundance of elements in water in a few comets have been made, and the majority of the results have indicated about twice as high a deuterium to hydrogen ratio in comets as is found in the oceans on earth. By contrast the water in meteorites has turned out to have ratios matching that found on earth's oceans. So, possibly water may have arrived on meteorites and asteroids rather than comets. So instances of comets with similar ratios to that found in the earth's oceans are interesting because they suggest that perhaps the water on earth might come from comets. So far only 1 or 2 comets have been found that might have isotopic hydrogen ratios like the water found on earth.
Why could it not have formed in situ ?? Most of the lighter stuff like hydrogen and water got moved towards the outer part of the solar system during formation resulting in rocky inner planets and gaseous/icy outer planets. If this is correct, then we need an explanation for why there is so much water on earth. Edited by NoNukes, : No reason given.
Under a government which imprisons any unjustly, the true place for a just man is also in prison. Thoreau: Civil Disobedience (1846) I have never met a man so ignorant that I couldn't learn something from him. Galileo Galilei If there is no struggle, there is no progress. Those who profess to favor freedom, and deprecate agitation, are men who want crops without plowing up the ground, they want rain without thunder and lightning. Frederick Douglass
| This message is a reply to: | | | Message 4 by herebedragons, posted 07-31-2014 11:25 PM | | herebedragons has not replied |
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New Cat's Eye
Inactive Member
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Message 6 of 47 (735165)
08-06-2014 12:41 PM
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Reply to: Message 3 by Tangle
07-31-2014 10:58 AM
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Squee!
Getting closer:
Also, here's a cool animation of the trajectory: Rosetta’s twelve-year journey in space - 421241 - ESA embed video
| This message is a reply to: | | | Message 3 by Tangle, posted 07-31-2014 10:58 AM | | Tangle has replied |
| Replies to this message: | | | Message 7 by Tangle, posted 08-06-2014 12:45 PM | | New Cat's Eye has replied | | | Message 10 by RAZD, posted 08-06-2014 3:36 PM | | New Cat's Eye has replied |
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Tangle
Member Posts: 9504 From: UK Joined: 10-07-2011 Member Rating: 4.8
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Re: Squee!
Where can I buy me a "gravity assist?"
Life, don't talk to me about life - Marvin the Paranoid Android "Science adjusts it's views based on what's observed. Faith is the denial of observation so that Belief can be preserved." - Tim Minchin, in his beat poem, Storm.
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New Cat's Eye
Inactive Member
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Message 8 of 47 (735167)
08-06-2014 12:57 PM
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Reply to: Message 7 by Tangle
08-06-2014 12:45 PM
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Re: Squee!
Where can I buy me a "gravity assist?" Your wife should be sufficient. Hey-yo!
| This message is a reply to: | | | Message 7 by Tangle, posted 08-06-2014 12:45 PM | | Tangle has not replied |
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Dr Adequate
Member (Idle past 307 days) Posts: 16113 Joined: 07-20-2006
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Message 9 of 47 (735168)
08-06-2014 1:54 PM
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Reply to: Message 1 by Tangle
07-20-2014 12:33 PM
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Arewethereyet arewethereyet arewethereyet?
| This message is a reply to: | | | Message 1 by Tangle, posted 07-20-2014 12:33 PM | | Tangle has replied |
| Replies to this message: | | | Message 13 by Tangle, posted 08-06-2014 4:45 PM | | Dr Adequate has not replied |
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RAZD
Member (Idle past 1427 days) Posts: 20714 From: the other end of the sidewalk Joined: 03-14-2004
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Re: Squee!
Somebodies spents lotsa time on that path .... 
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New Cat's Eye
Inactive Member
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Message 11 of 47 (735179)
08-06-2014 4:00 PM
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Reply to: Message 10 by RAZD
08-06-2014 3:36 PM
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Re: Squee!
Somebodies spents lotsa time on that path .... Makes you wonder how all those brain-washed scientists figured it out when there's nobody out there in space to witness all of it 
| This message is a reply to: | | | Message 10 by RAZD, posted 08-06-2014 3:36 PM | | RAZD has replied |
| Replies to this message: | | | Message 12 by RAZD, posted 08-06-2014 4:06 PM | | New Cat's Eye has not replied |
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RAZD
Member (Idle past 1427 days) Posts: 20714 From: the other end of the sidewalk Joined: 03-14-2004
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Re: Squee!
they musta been stoned man 
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Tangle
Member Posts: 9504 From: UK Joined: 10-07-2011 Member Rating: 4.8
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Dr A writes: Arewethereyet arewethereyet arewethereyet? Yes. Let's we play 'eye spy.' i spy with my little eye something beginning with 'm' Meteor Bugger.
Life, don't talk to me about life - Marvin the Paranoid Android "Science adjusts it's views based on what's observed. Faith is the denial of observation so that Belief can be preserved." - Tim Minchin, in his beat poem, Storm.
| This message is a reply to: | | | Message 9 by Dr Adequate, posted 08-06-2014 1:54 PM | | Dr Adequate has not replied |
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Tangle
Member Posts: 9504 From: UK Joined: 10-07-2011 Member Rating: 4.8
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Message 14 of 47 (735195)
08-07-2014 4:21 AM
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Well Rosetta has arrived and is in orbit around the meteor
The lander doesn't deploy until November...pfnnrr
Life, don't talk to me about life - Marvin the Paranoid Android "Science adjusts it's views based on what's observed. Faith is the denial of observation so that Belief can be preserved." - Tim Minchin, in his beat poem, Storm.
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Dr Adequate
Member (Idle past 307 days) Posts: 16113 Joined: 07-20-2006
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Message 15 of 47 (735239)
08-07-2014 6:00 PM
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Reply to: Message 14 by Tangle
08-07-2014 4:21 AM
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As the bartender said to the bear, why the big pause?
| This message is a reply to: | | | Message 14 by Tangle, posted 08-07-2014 4:21 AM | | Tangle has not replied |
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