[meteorite-list] Re: [meteorite-list]Atmospheric Blowout( was Cosmos 96/Kecksburg-Venus Question)

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From: E.J <jonee_at_meteoritecentral.com>
Date: Thu Apr 22 10:28:34 2004
Message-ID: <3F9700F0.70401_at_epix.net>

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Yes ordinarily the atmosphere's density on Venus makes for a formidable
obstacle.  Be it remembered, that with a huge impact event there is
theorized to be a blowout over the impact site.  We think this plume of
ejecta can reach the top of the atmosphere, plus exceed escape velocity. 
 
As for Mercury my recollection is that it has a micro atmosphere and
wouldn't be a factor in reaching escape velocity. It is hard to rule
out  that nothing could escape  both Mercury and the Sun.  I think the
masses of the Moon and Murcury are nearly the same.  I'll have to think
on the Sun catching everything  however it does make it a lot more
remote that we on Earth catch anything liberated from either innner
planet. 
 
So I am not ready to rule out the  possibility that Venus of Mercury 
have releases meteor-oids into the solar system. 
 
Elton 
 
 
Bernhard "Rendelius" Rems wrote: 
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 I
thought about the chances for meteorites from Venus or even Mercury a
couple of
days ago, too. My conclusion (which isn’t a scientific one, just an
educated guess): Venusian atmosphere is so dense that it will slow down
an
impacting body considerably (reducing his energy) and slow down ejecta
as well
(making it impossible to reach escape velocity). With Mercury, I guess
the sun
will be the “big catcher” that will collect all ejected material.<o:p></o:p>
 <o:p> </o:p>
 But
once again, I am not a scientist J<o:p></o:p>
 <o:p> </o:p>
 Bernhard<o:p></o:p>
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Received on Wed 22 Oct 2003 06:13:04 PM PDT

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