[meteorite-list] Meteorites from Outside the Solar System

From: Martin Horejsi <martinh_at_meteoritecentral.com>
Date: Thu Apr 22 10:08:27 2004
Message-ID: <B9AE045A.4674%martinh_at_isu.edu>

Hi Rafael and all:

We do have meteorites from outside our solar system, sort-of. Actually some
parts of meteorites are from outside the SS. They are in the form of
Interstellar Grains. I've read that anyone with a thin section of Murchison
can most likely find one in the field of view of their microscope.

Also, there are interstellar grains in many other meteorites besides the
enigmatic Murchison.

Additionally, the STARDUST mission is gathering and studying interstellar
dust as we speak and will so through this December.

Here is a quote from the STARDUST site:

"A Dust Flux Monitor Instrument (DFMI) on Stardust will be used to monitor
interstellar dust particle encounters. In addition, a Cometary and
Interstellar Dust Analyzer instrument (CIDA) will intercept and perform
real-time compositional analysis on this dust. The findings of both
instruments will be sent back to Earth for further analysis."

Here is a link to more information on that:

http://stardust.jpl.nasa.gov/science/dust.html

Cheers,

Martin





 gathering On 9/18/02 8:22 AM, "Rafael B. Torres"
<spacecollection2001_at_hotmail.com> wrote:

> Hello List Good Morning to all and happy day=A1=A1=A1. I was reading Rocks from
> Space and looking at my collection, thinking about meteorites. In one par=
t
> of the book Norton says that asteroids in early solar system were perturb=
ed
> by Jupiter's gravity, sending them aoutside the solar system=A1...I thought=
 a
> bout that, there must be several asteroids from Earth that are wandering =
and
> traveling somewhere there aoutside our solar system within out Milky
> Way....If thats possible, maybe the other way is too=A1=A1=A1=A1.
>=20
> This is what I mean, there are millions of stars in our Milky WAy, which
> thousands (and more=A1=A1) may have planets forming or formed, there are also
> millions of dark bodies, and gas clouds, where asteroids or planetesimals
> may be forming, well if a star passes near one of them or just another bi=
g
> planet, they might be millions of pieces of rock wandering our Milky WAy,
> what are the chances of one entering the solar system, making its way
> through Earth and more important what chracteristics should it
> show?????...Is there any expert on this topic that can answer this, maybe
> they have an older isotopic record, but the isotopes and daughter maybe a=
re
> destroyed after several million years, do we have any chances to idenify =
an
> intruder from outside the Solar System??????
>=20
> Maybe we have a meteorite from Outside the Solar System in our collection=
s,
> but we don't know, maybe we should look closer and remenber that next tim=
e
> we hold a NWA meteorite. Thats what I like of NWA meteorites, we never kn=
ow
> what have they seen=A1=A1=A1=A1
>=20
>=20
> Rafael B. Torres
> 2001 Space Collection
> http://www.geocities.com/rafael_blando
>=20
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>=20
>=20
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Received on Wed 18 Sep 2002 12:22:18 PM PDT