Supplementary Reading for Lecture 4

A nice introduction to coordinates on the celestial sphere. 

A course on History and Civilization. For an interesting and controversial possible connection with precession see Section 12: Roman Cults and Worship.

A nice discussion of Hipparchus and precession.

David Ulansey has proposed that Mithraism is connected with precession.

See also a criticism by a well-known scholar of ancient astronomy, Noel Swerdlow, and Ulansey’s reply.