linkedin post 2018-02-04 06:22:39

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SO ENDS this contemplation of the origin of the elements. Is it just the way that the human mind works that makes a seemingly chaotic universe appear orderly, when we can arrange the elements in an exquisitely logical and orderly sequence called the Periodic Table, or is there a genuine order to that swirling universe? Or that we can take a burning dying star and infer such linear equations of elemental synthesis from a planetary body in collapse? An important but hard to answer question. View in LinkedIn
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linkedin post 2018-02-04 06:17:55

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CHEMICAL EVOLUTION OF GALAXIES. “Galactic chemical evolution (GCE), in particular, has provided stringent constraints on stellar yields. Different elements are produced from stars on different timescales. Therefore, elemental and isotopic abundance ratios evolve as a function of time in a galaxy.” https://lnkd.in/gg9biYa View in LinkedIn
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linkedin post 2018-02-04 06:16:11

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“THE CNO CYCLE refers to the Carbon-Nitrogen-Oxygen cycle, a process of stellar nucleosynthesis in which stars on the Main Sequence fuse hydrogen into helium via a six-stage sequence of reactions.” C12 —> N13 —> C13 —> N14 —> O15 —> N15 —> C12. “Thus, the carbon-12 nucleus used in the initial reaction is regenerated in the final one and hence acts as a catalyst for the whole cycle. Stars of lower mass convert hydrogen to helium via an alternative process known as the ‘proton-proton chain’.“ https://lnkd.in/gfyaz5f View in LinkedIn
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