Source Readings
- Ptolemy, Almagest (c. A.D. 150)
- Nicolaus Copernicus, Commentariolus (1514)
- Galileo Galilei, Dialogue Concerning the Two Chief World Systems (1632)
- Edwin Hubble, The Realms of the Nebulae (1937)
- Fred Hoyle, The Nature of the Universe (1950)
- Steven Weinberg, The First Three Minutes: A Modern View of the Origin of the Universe (1977)
- Robert Jastrow, Red Giants and White Dwarfs (1980)
- Stephen Hawking, A Brief History of Time (1988)