[meteorite-list] Titanium Reveals Explosive Origins of the Solar System

From: Steve Dunklee <sdunklee72520_at_meteoritecentral.com>
Date: Wed, 22 Apr 2009 01:46:15 -0700 (PDT)
Message-ID: <303096.19915.qm_at_web33207.mail.mud.yahoo.com>

This is a very interesting subject! Heavy elements produced by super nova at a steady state ! is the ratio of the two types of nova observed at the same ratio as the isotopes found? Lightning here on earth has been measured to have temp as hot as the surface of the sun. Could lightning in larger planets like Saturn have enough energy to produce heavier elements? Imagine how powerful lightning would be if it formed in the sun? if it has sun like temp's on earth how hot and how much pressure would it produce inside a star? where does the carbon inside burned out light bulbs come from?
some day we may know?
have a great day!
Steve


--- On Sun, 4/19/09, Ron Baalke <baalke at zagami.jpl.nasa.gov> wrote:

> From: Ron Baalke <baalke at zagami.jpl.nasa.gov>
> Subject: [meteorite-list] Titanium Reveals Explosive Origins of the Solar System
> To: "Meteorite Mailing List" <meteorite-list at meteoritecentral.com>
> Date: Sunday, April 19, 2009, 9:28 PM
>
> http://www.newscientist.com/article/dn16969-titanium-reveals-explosive-origins-of-the-solar-system.html?
>
>
> Titanium reveals explosive origins of the solar system
> by Rachel Courtland
> New Scientist
> 16 April 2009
>
> The solar system emerged from a well-blended soup of dust
> and gas
> despite being cobbled together from the remains of multiple
> exploded
> stars, new meteorite measurements suggest.
>
> Meteorites form a fossil record of the conditions that
> existed when they
> formed. By looking at the chemical makeup of some rocks,
> evidence has
> mounted in recent years that sun and the rest of the solar
> system formed
> from a cloud of debris blasted away from a number of
> supernovae.
>
> But it is still unclear what that cloud - the solar nebula
> - looked like
> or how many stars might have been involved in the Sun's
> birth. Now, a
> team led by Martin Bizzarro of the Natural History Museum
> of Denmark has
> found one clue.
>
> Bizzarro and colleagues measured the levels of titanium in
> meteorites
> from the moon and Mars as well as inclusions in some
> meteorites that are
> thought to be the oldest rocks in the solar system.
> ? ? ?
> Stable forms
>
> Titanium is a good probe for conditions billions of years
> ago because it
> does not evaporate easily. It also has a number of stable
> isotopes -
> forms of the element that contain different numbers of
> neutrons - that
> can be used to cross-check each other.
>
> Although the concentration of titanium varied from rock to
> rock, the
> team found that two isotopes of titanium - titanium-50 and
> titanium-46 -
> were always found in the same ratio.
>
> "It is quite astonishing," since these two different
> isotopes probably
> formed in different stellar explosions, Bizzarro told New
> Scientist.
> Titanium-46, which contains 22 protons and 24 neutrons, is
> created
> inside the cores of massive collapsing stars.
>
> Titanium-50, which contains 22 protons and 28 neutrons, is
> commonly
> created when white dwarf stars explode as type Ia
> supernovae
> after gorging on a companion star.
> ? ? ?
> Well mixed
>
> If these two types of titanium come from two sources but
> are always
> found in the same ratio, the solar nebula must have been
> very well
> mixed. The level of mixing seems to exceed what meteorite
> researchers
> have seen in the isotopes of other elements, Bizzarro
> says.
>
> "People thought that the isotope anomalies typically
> reflected that the
> cloud from which the solar system formed was not very well
> homogenised,"
> says Bizzarro. He suspects the differences that are seen
> between the
> planets, asteroids, and other rocks came later, when the
> young sun was
> more active, sending out vaporising solar flares.
> ? ? ?
> Stray cloud
>
> But there may be alternative explanations for the seemingly
> universal
> ratio of titanium concentrations.
>
> The mix could also be explained if a stray cloud of dust
> containing both
> varieties of titanium hit the early solar system, says Jeff
> Hester of
> Arizona State University in Tempe.
>
> "Then you could have wild inhomogeneity in how the dust was
> distributed
> in the solar disc, while preserving the association between
> the two
> isotopes of titanium," he says.
>
> Journal reference: Science <www.sciencemag.org> (vol
> 324, p 374)
>
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Received on Wed 22 Apr 2009 04:46:15 AM PDT