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View Diary: Stellar Evolution Measured on Earth: Clues from Ti-44 "Nuclear Fossils" (53 comments)

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    •  Stopped reading partway in to get down here (5+ / 0-)
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      NNadir, bythesea, Bob Love, ybruti, Athenian

      to request that you do some serious editing, starting with a spel-chekur ("existance," "fundemental"), & continuing thus:

      The only truly stable element is iron, since its binding energy is such that lighter elements that fuse into it (or lower elements) will release energy, and heavier elements splitting to form it will absorb energy.
      I gather you're trying to express the fact that since iron lies at the bottom of the curve of binding energy, producing it (via fission or fusion) will release energy & producing anything from it (via fission or fusion) will absorb energy? In which case, isn't the part in bold, um, incorrect? (Or am I missing the point here?)

      Also--

      Even though hydrogen is largely depleted at this phase, traces of it still exist, and when residual hydrogen (or helium or other elements) fuse with iron (or when other other elements close in weight to iron fuse) the resulting nuclei can be heavier than hydrogen.
      That last "hydrogen" ought to be "iron," n'est-ce pas? I know, it's late, we're tired, etc.

      (OK. Going back now to finish what has been a very interesting diary...)

      snarcolepsy, n: a condition in which the sufferer responds to any comment with a smartass comeback.

      by Uncle Cosmo on Tue Jun 07, 2011 at 08:36:32 PM PDT

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    •  Also-- (2+ / 0-)
      Recommended by:
      NNadir, bythesea
      Ultimately such stars run out of helium.
      --you meant hydrogen, nyet? (Since you hadn't gotten to the triple-alpha process at this point?)

      Sorry if it seems like nitpicking, but I appreciate your diaries & want them to be spiffy & sparkling in every way so that others will as well...

      snarcolepsy, n: a condition in which the sufferer responds to any comment with a smartass comeback.

      by Uncle Cosmo on Tue Jun 07, 2011 at 08:39:19 PM PDT

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    •  Edit needed? (0+ / 0-)

      8th paragraph?

       If deuterium were not a trace isotope in the solar region (which is not every in the universe) it is very unlikely that life as we know it could exist.

      (bold mine)

      everywhere? even? Could have very different meanings!

      Darn those spellcheckers?

      Otherwise, very interesting read!

      I am much too liberal to be a Democrat.

      by WiseFerret on Tue Jun 07, 2011 at 09:50:27 PM PDT

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