Basics of cosmology
The Distance Ladder — Parallax, Cepheids and Type Ia Supernovae
The Milky Way — Disc, Bulge, Halo and Where the Sun Sits
Types of Galaxy — Spirals, Ellipticals and Hubble's Tuning Fork
Galaxy Rotation Curves and Dark Matter: Why the Outer Disc Does Not Slow Down
Hubble's Law — Redshift, the Expanding Universe and the Age It Implies
The Cosmic Microwave Background — Recombination, the 2.7 K Glow and Its Blotches
Big Bang Nucleosynthesis — Why a Quarter of the Universe Is Helium
The Accelerating Universe — Distant Supernovae and Dark Energy
The Contents and Fate of the Universe — Critical Density, Omega and a Flat Space
Large-Scale Structure — Clusters, Filaments, Voids and the Frame of Dark Matter