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Do we all belong to the same star?

  1. Mar 29, 2015 #1
    I recently read this kind of question on Quora and found it interesting. Do all of the Earth's materials(and therefore humans) belong the same star of different star? What's more likely?

    In my opinion, the chances of all of the material belonging to one star are pretty slim because a complex organism like humans require a lot of of different elements and it is unlikely that a single star will contain all of his elements.
     
  2. jcsd
  3. Mar 29, 2015 #2
    The solar system formed from a nebula that would have most likely contained material originating from several previous stars.
    That and quite a lot of interstellar hydrogen which never was previously in a star.
     
    Last edited: Mar 29, 2015
  4. Mar 29, 2015 #3

    russ_watters

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    The sun is believed to be a 3rd generation star.
     
  5. Mar 30, 2015 #4
    So?
     
  6. Mar 30, 2015 #5

    russ_watters

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    So it contains materials from at least 2 other stars.
     
  7. Mar 30, 2015 #6
    And what evidence do we have for it?
     
  8. Mar 30, 2015 #7

    russ_watters

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    The mixture of elements in the sun and solar system. A first generation star doesn't have any heavier elements, so can't have any rocky planets around it.

    See: http://en.m.wikipedia.org/wiki/Sun
    Under the sub-header "characteristics."
     
  9. Mar 30, 2015 #8

    Chronos

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    The universe was over 9 billion years old by the time the sun formed, and our galaxy was around 8 billion years old at that time. The lifespan of stars massive enough to produce heavy elements is measured in a handful of millions of years. This makes it a virtual certainty the solar system contains remnants of many stars.
     
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