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…
PowerPoint Presentation 1 What is it…? A Duck, or a Rabbit?! Pythagoras: “All is Number” the “Music of the Spheres” Intervals between harmonious musical notes…
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…