Documents Astro-2: History of the Universe Lecture 9; May 9 2013.

Presentation for perspective graduate students 2006 Astro-2: History of the Universe Lecture 9; May 9 2013 1 Previously… on Astro-2. Helium abundance. Helium is too abundant…

Documents Astro-2: History of the Universe

Presentation for perspective graduate students 2006 Astro-2: History of the Universe Lecture 9; May 9 2013 1 Previously… on Astro-2. Helium abundance. Helium is too abundant…