FYI: Dark Matter Lecture

• "The Cosmic Cocktail: Three Parts Dark Matter"
• Prof. Katherine Freese (U Texas)
• Physics Colloquium: online 4pm Wed Apr 13

Density and Destiny

• critical density
• estimates of Omega, e.g., from clusters
• current (bizarre) status: cosmic pie chart
• cosmic histories plotted

The Cosmic Past

• recent past
• distant past
• the big bang (pardon my French)

The Cosmic Microwave Background: Discovery and Average Properties

• discovery; Nobel-prize winning 1.5-page paper
• temperature
• spectrum: purely thermal within current limits