For the first time, astronomers have detected the presence of arsenic and selenium, neighboring elements near the middle of the periodic table, in an ancient star in the faint stellar halo that surrounds the Milky Way. Arsenic and selenium are elements at the transition from light to heavy element production, and have not been found in old stars until now.

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  • Old star, new trick
    Astronomers analyze starlight to determine the chemical ... astronomers have detected the presence of arsenic and selenium, neighboring elements near the middle of the periodic table, in an ancient star in the faint stellar halo that surrounds the Milky ...
    05/2/2012 - 1:45 pm | View Link
  • Old star, new trick: Astronomers have detected arsenic and selenium in ancient star for first time
    For the first time, astronomers have detected the presence of arsenic and selenium, neighboring elements near the middle of the periodic table, in an ancient star in the ... 13.7 billion years. Astronomers analyze starlight to determine the chemical ...
    04/30/2012 - 6:33 am | View Link
  • Old star, new trick
    Now for the first time, astronomers have detected the presence of arsenic and selenium, neighboring elements near the middle of the periodic table, in an ancient star in the faint stellar halo that surrounds the Milky Way. Arsenic and selenium are elements ...
    04/29/2012 - 1:00 pm | View Link
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