31 min listen
Episode 20: The Theory of Epicycles & Deferents
Episode 20: The Theory of Epicycles & Deferents
ratings:
Length:
47 minutes
Released:
Aug 13, 2022
Format:
Podcast episode
Description
In the Hellenistic Era the astronomer Apollonius of Perga (maybe) developed the model of epicycles and deferents that was to dominate Western astronomy for more than 1500 years. Around the same time, Eratosthenes, woh was the head librarian at the Library of Alexandria, developed a novel technique to measure the circumference of the Earth and arrived at a suspiciously accurate result.
Released:
Aug 13, 2022
Format:
Podcast episode
Titles in the series (41)
Episode 1: The Heavens & History: How should we approach the history of astronomy?  How have the questions that astronomers have asked changed through the ages?  We look at some of these questions and sketch out the broad arc of this field from antiquity to the present day. by The Song of Urania