Metallicity

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The globular cluster M80. Starns in globular clusters are mainly aulder metal-puir members o Population II.

In astronomy an pheesical cosmology, the metallicity or Z is the fraction o mass o a starn or ither kind o astronomical object that isna in hydrogen (X) or helium (Y).[1][2]

References[eedit | eedit soorce]

  1. ↑ D. Kunth & G. Östlin (2000). "The Most Metal-poor Galaxies". 10 (1). The Astronomy and Astrophysics Review. Retrieved 3 February 2015. Cite journal requires |journal= (help)
  2. ↑ W. Sutherland (26 March 2013). "The Galaxy. Chapter 4. Galactic Chemical Evolution" (PDF). Retrieved 13 January 2015.
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