[meteorite-list] "Flaming rocks"???

From: Rhett Bourland <rbourlan_at_meteoritecentral.com>
Date: Thu Apr 22 09:41:08 2004
Message-ID: <IOEBKAHMGFBDJMOFGDFNCEKICEAA.rbourlan_at_evansville.net>

I remember reading an article not too long ago about the ALH84001 meteorite.
The experiment was to prove that bacteria could survive the enty to earth
without heating to much. When magnetite is free here on earth it orients
itself to the magnetic poles. The magnetite on the inside of the meteorite
was not oriented yet. The researchers then proceeded to heat the meteorite
until it was hot enough for it to orient itself. They found that once it
got up to around 100 degrees fahrenhite the magnetite would reorient itself.
In comparison that's about how hot you car would get on hot summer day. The
outside of the meteorite does get very hot. That's how fusion crust is
formed. But what's been show to happen is once the material gets hot enough
it ablates away leaving the ice cold rock that has been floating around in
the coldness of space for billions of years.

Rhett Bourland
www.evansville.net/~rbourlan

-----Original Message-----
From: meteorite-list-admin_at_meteoritecentral.com
[mailto:meteorite-list-admin_at_meteoritecentral.com]On Behalf Of
Meteordealer
Sent: Saturday, February 10, 2001 2:43 AM
To: Meteorite-list_at_meteoritecentral.com
Subject: Re: [meteorite-list] "Flaming rocks"???


  So why is it exactly that meteorites are believed to be cold when they
fall? The exterior skin of supersonic aircraft becomes so hot during flight
that people are unable to touch them when they land. They actually have to
sit and cool down before the pilots can exit them. From what i understand
this is due to the air friction that the aircraft undergoes during high
speed flight. Why wouldn't the same thing happen to a meteorite? Also, why
would space junk be hot after entering the atmosphere but not meteorites??

Brad Sampson
meteor.dealer_at_gte.net

----- Original Message -----
From: "David Freeman" <dfreeman_at_fascination.com>
To: "Walter Branch" <waltbranch_at_earthlink.net>
Cc: <Meteorite-list_at_meteoritecentral.com>
Sent: Friday, February 09, 2001 8:13 PM
Subject: Re: [meteorite-list] "Flaming rocks"???


> Dear Walter and All,
> So, is this how some sleeping dogs die and some do not, by the "flame" of
> the rock?
> Dog lives!
> Ruff,
> Dave F.
>
> Walter Branch wrote:
>
> > > > 16-year old Shawn Coleman was walking home from a friends hour--
> > > > when he saw something shooting down from the sky--into his front
> > > > yard. Shawn kicked snow on the flaming rock to cool it off--then
> > > > ran in to show his family.
> > >
> > > When is this myth about hot meteorites going to die??!
> > > "Flaming rocks"? We have Hollywood to thank for this
> > > misconception. --Rob
> >
> > Maybe this is how Egyptian dogs get turned into ashes. . .
> >
> > (please, I'm only kidding)
> >
> > -Walter
> >
> > -------------------------------------------------
> > Walter Branch, Ph.D.
> > Branch Meteorites
> > 322 Stephenson Ave., Suite B
> > Savannah, GA 31405 USA
> > http://branchmeteorites.com
> > ----- Original Message -----
> > From: "Matson, Robert" <ROBERT.D.MATSON_at_saic.com>
> > To: <Meteorite-list_at_meteoritecentral.com>
> > Sent: Friday, February 09, 2001 2:36 PM
> > Subject: [meteorite-list] "Flaming rocks"???
> >
> > >
> > >
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Received on Sat 10 Feb 2001 01:50:14 PM PST