Welcome to the universe: an astrophysical tour

Pt. I, Stars, planets, and life :

The size and scale of the universe

From the day and night sky to planetary orbits

Newton's Laws

How stars radiate energy (I)

How stars radiate energy (II)

Stellar spectra

The lives and deaths of stars (I)

The lives and deaths of stars (II)

Why Pluto is not a planet

The search for life in the galaxy.

Pt. II, Galaxies :

The interstellar medium

Our milky way

The universe of galaxies

The expansion of the universe

The early universe

Quasars and supermassive black holes.

Pt. III, Einstein and the universe :

Einstein's road to relativity

Implications of special relativity

Einstein's general theory of relativity

Black holes

Cosmic strings, wormholes, and time travel

The shape of the universe and the big bang

Inflation and recent developments in cosmology

Our future in the universe

Appendix 1: Derivation of E=mc2

Appendix 2: Bekenstein, entrophy of black holes, and information.