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Author Topic:   Rosetta, Philae, Comet 67P & life.
Tangle
Member
Posts: 9530
From: UK
Joined: 10-07-2011
Member Rating: 4.9


(1)
Message 1 of 47 (733725)
07-20-2014 12:33 PM


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.

Replies to this message:
 Message 4 by herebedragons, posted 07-31-2014 11:25 PM Tangle has not replied
 Message 9 by Dr Adequate, posted 08-06-2014 1:54 PM Tangle has replied

  
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Message 2 of 47 (733727)
07-20-2014 5:00 PM


Thread Copied from Proposed New Topics Forum
Thread copied here from the Rosetta, Philae, Comet 67P & life. thread in the Proposed New Topics forum.

  
Tangle
Member
Posts: 9530
From: UK
Joined: 10-07-2011
Member Rating: 4.9


(1)
Message 3 of 47 (734593)
07-31-2014 10:58 AM


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.

Replies to this message:
 Message 6 by New Cat's Eye, posted 08-06-2014 12:41 PM Tangle has replied

  
herebedragons
Member (Idle past 934 days)
Posts: 1517
From: Michigan
Joined: 11-22-2009


Message 4 of 47 (734646)
07-31-2014 11:25 PM
Reply to: Message 1 by Tangle
07-20-2014 12:33 PM


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:
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Replies to this message:
 Message 5 by NoNukes, posted 08-01-2014 1:04 AM herebedragons has not replied

  
NoNukes
Inactive Member


Message 5 of 47 (734647)
08-01-2014 1:04 AM
Reply to: Message 4 by herebedragons
07-31-2014 11:25 PM


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.

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New Cat's Eye
Inactive Member


Message 6 of 47 (735165)
08-06-2014 12:41 PM
Reply to: Message 3 by Tangle
07-31-2014 10:58 AM


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

  
Tangle
Member
Posts: 9530
From: UK
Joined: 10-07-2011
Member Rating: 4.9


Message 7 of 47 (735166)
08-06-2014 12:45 PM
Reply to: Message 6 by New Cat's Eye
08-06-2014 12:41 PM


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.

This message is a reply to:
 Message 6 by New Cat's Eye, posted 08-06-2014 12:41 PM New Cat's Eye has replied

Replies to this message:
 Message 8 by New Cat's Eye, posted 08-06-2014 12:57 PM Tangle has not replied

  
New Cat's Eye
Inactive Member


(1)
Message 8 of 47 (735167)
08-06-2014 12:57 PM
Reply to: Message 7 by Tangle
08-06-2014 12:45 PM


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

  
Dr Adequate
Member (Idle past 361 days)
Posts: 16113
Joined: 07-20-2006


Message 9 of 47 (735168)
08-06-2014 1:54 PM
Reply to: Message 1 by Tangle
07-20-2014 12:33 PM


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

  
RAZD
Member (Idle past 1481 days)
Posts: 20714
From: the other end of the sidewalk
Joined: 03-14-2004


Message 10 of 47 (735174)
08-06-2014 3:36 PM
Reply to: Message 6 by New Cat's Eye
08-06-2014 12:41 PM


Re: Squee!
Also, here's a cool animation of the trajectory:
Rosetta’s twelve-year journey in space - 421241 - ESA embed video
Somebodies spents lotsa time on that path ....

we are limited in our ability to understand
by our ability to understand
RebelAmerican☆Zen☯Deist
... to learn ... to think ... to live ... to laugh ...
to share.


Join the effort to solve medical problems, AIDS/HIV, Cancer and more with Team EvC! (click)

This message is a reply to:
 Message 6 by New Cat's Eye, posted 08-06-2014 12:41 PM New Cat's Eye has replied

Replies to this message:
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New Cat's Eye
Inactive Member


(1)
Message 11 of 47 (735179)
08-06-2014 4:00 PM
Reply to: Message 10 by RAZD
08-06-2014 3:36 PM


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:
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RAZD
Member (Idle past 1481 days)
Posts: 20714
From: the other end of the sidewalk
Joined: 03-14-2004


Message 12 of 47 (735180)
08-06-2014 4:06 PM
Reply to: Message 11 by New Cat's Eye
08-06-2014 4:00 PM


Re: Squee!
they musta been stoned man

we are limited in our ability to understand
by our ability to understand
RebelAmerican☆Zen☯Deist
... to learn ... to think ... to live ... to laugh ...
to share.


Join the effort to solve medical problems, AIDS/HIV, Cancer and more with Team EvC! (click)

This message is a reply to:
 Message 11 by New Cat's Eye, posted 08-06-2014 4:00 PM New Cat's Eye has not replied

  
Tangle
Member
Posts: 9530
From: UK
Joined: 10-07-2011
Member Rating: 4.9


Message 13 of 47 (735182)
08-06-2014 4:45 PM
Reply to: Message 9 by Dr Adequate
08-06-2014 1:54 PM


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

  
Tangle
Member
Posts: 9530
From: UK
Joined: 10-07-2011
Member Rating: 4.9


(2)
Message 14 of 47 (735195)
08-07-2014 4:21 AM


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.

Replies to this message:
 Message 15 by Dr Adequate, posted 08-07-2014 6:00 PM Tangle has not replied

  
Dr Adequate
Member (Idle past 361 days)
Posts: 16113
Joined: 07-20-2006


Message 15 of 47 (735239)
08-07-2014 6:00 PM
Reply to: Message 14 by Tangle
08-07-2014 4:21 AM


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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