36 Lectures 
30 minutes / lecture

The Journey Ahead 
Denizens of the Universe 
Overall Cosmic Properties 
The Stuff of the Universe 
The Sweep of Cosmic History 
Measuring Distances 
Expansion and Age 
Distances, Appearances, and Horizons 
Dark Matter and Dark Energy—96%! 
Cosmic Geometry—Triangles in the Sky 
Cosmic Expansion—Keeping Track of Energy 
Cosmic Acceleration—Falling Outward 
The Cosmic Microwave Background 
Conditions during the First Million Years 
Primordial Sound—Big Bang Acoustics 
Using Sound as Cosmic Diagnostic 
Primordial Roughness—Seeding Structure 
The Dark Age—From Sound to the First Stars 
Infant Galaxies 
From Child to Maturity—Galaxy Evolution 
Giant Black Holes—Construction and Carnage 
The Galaxy Web—A Relic of Primordial Sound 
Atom Factories—Stellar Interiors 
Understanding Element Abundances 
Light Elements—Made in the Big Bang 
Putting It Together—The Concordance Model 
Physics at Ultrahigh Temperatures 
Back to a Microsecond—The Particle Cascade 
Back to the GUT—Matter and Forces Emerge 
Puzzling Problems Remain 
Inflation Provides the Solution 
The Quantum Origin of All Structure 
Inflation's Stunning Creativity 
Fine Tuning and Anthropic Arguments 
What's Next for Cosmology? 
A Comprehensible Universe?



Benyamin Mohammadi
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