[meteorite-list] Lunar capture theory

From: Ken O'Neill <kenoneill_at_meteoritecentral.com>
Date: Thu Apr 22 10:21:03 2004
Message-ID: <001801c347f6$cbf16e30$c56bdac3_at_btek.org>

Hi Tom & list
It's beyond me as well ! Robert Matson seems very much on the debris side, I
was just wondering if the debris was correct should there be little
difference in the chemical make up of the Moon and Earth ? What is the
comparison ? How different are they ? Its just a general question for the
list.

Regards

Ken O'Neill
Ken O'Neill Computing - The Small Business & Education IT Specialists
Networks - email - Internet Access - PC's - Security - Cost Efficient IT
Solutions
www.kenoneill.com <http://www.kenoneill.com>
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-----Original Message-----
From: Tom aka James Knudson [mailto:knudson911_at_frontiernet.net]
Sent: 11 July 2003 22:40
To: Ken O'Neill
Subject: Re: [meteorite-list] Lunar capture theory


Hello Ken, I hope your not directing this question to me, It is beyond my
knowledge! What do you think of the same debris theory, that as far as I
know I first came up with a few minutes ago?
Thanks, Tom
Peregrineflier
The proudest member of the IMCA 6168
----- Original Message -----
From: Ken O'Neill <kenoneill_at_kenoneill.com>
To: Meteorite-List (E-mail) <meteorite-list_at_meteoritecentral.com>
Sent: Friday, July 11, 2003 2:19 PM
Subject: RE: [meteorite-list] Lunar capture theory


> Hi List,
>
> Would there be anything in the geological comparison between Earth and
Moon
> that would lean toward the "capture" rather than "same debris" theory or
> vice versa ?
>
> Regards
>
> Ken O'Neill
>
>
>
> -----Original Message-----
> From: meteorite-list-admin_at_meteoritecentral.com
> [mailto:meteorite-list-admin_at_meteoritecentral.com]On Behalf Of Tom aka
> James Knudson
> Sent: 11 July 2003 21:48
> To: Matson, Robert; meteorite-list
> Subject: Re: [meteorite-list] Lunar capture theory
>
>
> Hello Robert and list, My understanding of planet formation in a nutshell
is
> that debris orbiting the Sun gradually merged and formed planets. Right?
> Why couldn't two bodies have formed from the same debris in the same
> orbit and orbiting around the sun together in the same direction and the
> same orbit, Gradually the Moon slowly caught up with the earth and got
> caught up in the earths gravity? Or the earth came up behind the Moon and
> captured it?
>
> Thanks, Tom
> Peregrineflier
> The proudest member of the IMCA 6168
> ----- Original Message -----
> From: Matson, Robert <ROBERT.D.MATSON_at_saic.com>
> To: meteorite-list <meteorite-list_at_meteoritecentral.com>
> Sent: Friday, July 11, 2003 1:01 PM
> Subject: [meteorite-list] Lunar capture theory
>
>
> > Tom wrote:
> >
> > > I do not believe the moon was made by a asteroid impact on the
> > > earth.
> >
> > What, specifically, about this theory bothers you?
> >
> > > I would first stand by the theory that it was caught up in our
> > > gravity.
> >
> > While this is a ~possible~ scenario, you have to understand how
> > extremely unlikely graceful capture is compared to impact.
> > The capture idea also has a difficult time explaining why the
> > Moon doesn't have a normal-sized core for a body of its size,
> > which the impact theory explains nicely. Finally, why the
> > oxygen-isotope similarity of earth and the Moon if the two
> > bodies formed in different parts of the solar system?
> >
> > Prior to the Apollo sample return missions (and the discovery
> > of our beloved lunar meteorites), the capture theory at least
> > had some wobbly legs to stand on. But O-isotope analysis of
> > the moon rocks knocked one leg out, and the other leg was swept
> > away by Lunar Prospector's confirmation that the moon's core
> > comprises less than 3% of the moon's mass.
> >
> > --Rob
> >
> >
> >
> > ______________________________________________
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> >
>
>
>
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Received on Fri 11 Jul 2003 05:52:56 PM PDT