As I stated in the earlier post, stars are made up of the same chemical elements as earth, though in different amounts. Most stars are made up of about 90% hydrogen. They also contain helium. The rest of a star's composition is usually oxygen, followed by carbon, neon, and nitrogen. Of the metals stars contain, iron is the dominant element.
But, to put it in proportion, the Sun contains only one atom of oxygen for every 1200 atoms of hydrogen and only one iron atom for every 32 oxygen atoms.
However, there are many stars that do not follow this trend. Depending on their age or position in the Galaxy, it can deviate drastically.
These chemical elements are only discovered from the star's spectra.
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