[meteorite-list] a serious meteorite question!
From: MexicoDoug_at_aol.com <MexicoDoug_at_meteoritecentral.com>
Date: Thu Apr 22 10:17:45 2004 Message-ID: <186.23044607.2d0aa8f2_at_aol.com> --part1_186.23044607.2d0aa8f2_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hello Tom, It is often said that the total mass of all the asteroids is less than that of our Moon. And Ceres and Vesta are what...perhaps half of it? There are three main classes of asteroids, C, S, M. C (Carbonaceous) are the most common and predate the Earth...4.6 billion years old. S (Silicate) are similarly ages but reflect more. Finally M (Metal) are the metallic ones that you mention and are about the proportion of meteorite falls ---low in the single digits. So there ain't much out there, that could have been a differentiated planet as your daughter envisioned. And regarding the meteorites, I'm sure the more experts on the list will do better...but of course there are plently of meteorites believed known from the same bodies - like (4) Vesta. Scientists believe that Ceres and Vesta differentiated on their own...and contrary to your theory...should have formed a planet, but never did because Jupiter didn't let them settle together. Check out the Dawn mission design. Saludos Doug Dawn Mexico En un mensaje con fecha 12/11/2003 10:52:01 PM Mexico Standard Time, knudson911_at_frontiernet.net escribe: > Hello List, > My daughter and I were discussing iron meteorites, and she came up with > a question that I couldn't answer, and I was hoping one of you could. > Some people think that there was a large planet between Jupiter and > Saturn and it was destroyed by a cataclysmic catastrophe of biblical > proportions which resulted in the asteroid belt where most of our meteorites > are believed to come from. Does this sound right so far? > Iron meteorites are believed to be from the core of a planet such as the > one that was destroyed by the cataclysmic catastrophe. > Is it thought that some of our iron meteorites come from the asteroid > belt? If so, it would seem like different iron falls would match beings > they came from the same iron core? > Has any two irons from separate falls been matched? It would seem like > more than one iron meteoroid would have came from the asteroid belt and end > up an iron meteorite. Am I missing something? > > Thanks, Tom > --part1_186.23044607.2d0aa8f2_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable <HTML><FONT FACE=3Darial,helvetica><FONT SIZE=3D2 FAMILY=3D"SANSSERIF" FACE= =3D"Arial" LANG=3D"0">Hello Tom,<BR> <BR> It is often said that the total mass of all the asteroids is less than that=20= of our Moon. And Ceres and Vesta are what...perhaps half of it? =20= There are three main classes of asteroids, C, S, M. C (Carbonaceous) a= re the most common and predate the Earth...4.6 billion years old. S (S= ilicate) are similarly ages but reflect more. Finally M (Metal) are th= e metallic ones that you mention and are about the proportion of meteorite f= alls ---low in the single digits. So there ain't much out there, that=20= could have been a differentiated planet as your daughter envisioned. A= nd regarding the meteorites, I'm sure the more experts on the list will do b= etter...but of course there are plently of meteorites believed known from th= e same bodies - like (4) Vesta. Scientists believe that Ceres and Vest= a differentiated on their own...and contrary to your theory...should have fo= rmed a planet, but never did because Jupiter didn't let them settle together= . Check out the Dawn mission design.<BR> <BR> Saludos<BR> Doug Dawn<BR> Mexico<BR> <BR> <BR> En un mensaje con fecha 12/11/2003 10:52:01 PM Mexico Standard Time, knudson= 911_at_frontiernet.net escribe:<BR> <BR> <BLOCKQUOTE TYPE=3DCITE style=3D"BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT= : 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Hello List,<BR> My daughter and I were discussing iron meteorites, and she came up wi= th<BR> a question that I couldn't answer, and I was hoping one of you could.<BR> Some people think that there was a large planet between Jupiter and<B= R> Saturn and it was destroyed by a cataclysmic catastrophe of biblical<BR> proportions which resulted in the asteroid belt where most of our meteorites= <BR> are believed to come from. Does this sound right so far?<BR> Iron meteorites are believed to be from the core of a planet such as=20= the<BR> one that was destroyed by the cataclysmic catastrophe.<BR> Is it thought that some of our iron meteorites come from the asteroid= <BR> belt? If so, it would seem like different iron falls would match being= s<BR> they came from the same iron core?<BR> Has any two irons from separate falls been matched? It would se= em like<BR> more than one iron meteoroid would have came from the asteroid belt and end<= BR> up an iron meteorite. Am I missing something?<BR> <BR> Thanks, Tom<BR> </BLOCKQUOTE><BR> <BR> </FONT></HTML> --part1_186.23044607.2d0aa8f2_boundary-- Received on Fri 12 Dec 2003 12:15:30 AM PST |
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