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Chemical composition of solar system

  1. Nov 20, 2009 #1
    If our solar system originated from the same dust / gas cloud, why do we see such differences in abundance of elements from one body to another. I can come up with two possible answers:

    1. Rotation of cloud centrifuged heavier elements towards edge (Almost certainly not true, because it would need to overcome gravity, and composition of solar system bodies does not follow that pattern)

    2. At some point in solar system formation original dust cloud, which presumably consisted of mainly light elements, interacted with another material, probably much smaller in quantity, and different in origin.

    I am only guessing, so any help on this is welcome.
  2. jcsd
  3. Nov 20, 2009 #2

    D H

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    Why guess when you can easily find the answers on the 'net?

    Google (or pick your favorite search engine) the following terms:
    planet formation
    frost line planet formation
    planet migration
  4. Nov 20, 2009 #3


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    Gold Member


    Solar wind
    terrestrial planets versus jovian planets
    rocky planets versus gaesous planets
  5. Nov 20, 2009 #4
    Yes, that's nice, but if you start to google things, you get bunch of information, not necessary consistent with each other, although they are all from trustworthy sources.
    One of them being that Earth's and Mars's composition is different, especially Fe/Si ratio, and that C1 model does not hold on Mars. Other thing is water splashing formed Earth from outer solar system. I see that I oversimplified things, but it seems that this issue is far from resolved.
    Last edited: Nov 20, 2009
  6. Nov 20, 2009 #5
    What is the mechanism that made young Sun eject heavy elements?
  7. Nov 20, 2009 #6


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    It didn't. The heavy metals were in the protostellar dust cloud when the sun formed. They were formed during the nova deaths of older stars.
  8. Nov 20, 2009 #7
    No, not asking when they were synthesized. Some article I stumbled upon, claims that young Sun ejected what was already in there of heavier elements, not describing mechanism, but I can't see how.
    So what would be a book to read on stellar formation?
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