Arthur Koestler's - The Sleepwalkers, Part Three: The Timid Canon, with Guided Notes (The Arm Chair Astronomy Series Book 5)

The purpose of the Arm Chair Astronomy series is to make available well-written essays in popular astronomy created by expert astronomers and astrophysicists.

To advance the reading and understanding, Guided Notes are provided with this essay in the series.

Volume Five of the Arm Chair Astronomy Series features The Timid Canon, Part Three of Arthur Koestler’s The Sleepwalkers: A History of Man’s Changing Vision of the Universe, Hutchinson of London, London UK, 1959

The Timid Canon is Nicolas Copernicus. This part of Koestler's Sleepwalkers is a well written description of the life and work of Copernicus and is a critical assessment of the strengths and weaknesses of his' heliocentric model of the solar system.

Koestler's book Sleepwalkers is considered one of the finest treatises about the history of 16th and 17th century Astronomy.