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Keyword: sdssj102915172927

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  • Astronomy Picture of the Day -- SDSS J102915+172927: A Star That Should Not Exist

    09/07/2011 1:17:20 AM PDT · by SunkenCiv · 37 replies
    NASA ^ | September 07, 2011 | (see photo credit)
    Explanation: Why does this star have so few heavy elements? Stars born in the generation of our Sun have an expected abundance of elements heavier than hydrogen and helium mixed into their atmospheres. Stars born in the generation before our Sun, Population II stars, the stars that created most of the heavy elements around us today, are seen to have some, although less, elements heavier than H and He. Furthermore, even the elusive never-seen first stars in the universe, so-called Population III stars, are predicted to have a large mass and a small but set amount of heavy elements. Yet...