[meteorite-list] Science Journal: Earth's water didn't come from comets, scientists now say

From: Count Deiro <countdeiro_at_meteoritecentral.com>
Date: Fri, 12 Dec 2014 16:48:21 -0800 (GMT-08:00)
Message-ID: <3287700.1418431702046.JavaMail.root_at_wamui-hunyo.atl.sa.earthlink.net>

Namaste...My children. There is no need to disturb your first Shakra. All of us here at the Ashram in the Berkely of California know that water has always come from the dark clouds of the heavens in quatities that used to be more than enough, but Shivasathadpura will correct this error soon, and you will be engulfed again. Shubhamastu. Swami Rashneesh Fulloscat.

-----Original Message-----
>From: Chris Peterson via Meteorite-list <meteorite-list at meteoritecentral.com>
>Sent: Dec 12, 2014 3:36 PM
>To: meteorite-list at meteoritecentral.com
>Subject: Re: [meteorite-list] Science Journal: Earth's water didn't come from comets, scientists now say
>
>There is nothing definitive about it. The paper describes many factors
>that could change the D/H ratio in different samples, and is much more
>cautious in its conclusions than the typical press reports suggest:
>
>"From the ROSINA measurements on comet 67P/Churyumov-Gerasimenko, we
>conclude that the D/H values of JFCs [Jupiter family comets] may be
>highly heterogeneous, possibly reflecting the diverse origins of JFCs.
>If this is the case, then the new measurement supports models advocating
>an asteroidal (i.e., carbonaceous chondrite-like), rather than cometary
>origin for the oceans, and by extension for the terrestrial atmosphere."
>
>Chris
>
>*******************************
>Chris L Peterson
>Cloudbait Observatory
>http://www.cloudbait.com
>
>On 12/12/2014 1:50 PM, Michael Mulgrew via Meteorite-list wrote:
>> I am curious how such a definitive conclusion can be reached from the
>> analysis of a singular cometary body? How many comets are out there
>> floating around the solar system? I guess they are assuming all
>> comets have the same make-up? Seems a bit short sighted to me,
>> considering, for example, how diverse asteroidal composition is.
>> Imagine if we landed a probe on one asteroid, then extrapolated the
>> results of that landing to apply to all asteroids, what a gross
>> neglect of diversity that would be.
>>
>> Hopefully I'm missing something here and someone will chime in and
>> explain it to me.
>>
>> Michael in so. Cal.
>
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Received on Fri 12 Dec 2014 07:48:21 PM PST