tag:blogger.com,1999:blog-3407624264627208128.post828634003376311683..comments2024-01-26T21:38:25.924-08:00Comments on Duane's PoeTree: Eliza Segiet writesDuanesPoeTreehttp://www.blogger.com/profile/17053093400086634552noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-3407624264627208128.post-17220913129846582892019-05-20T17:07:00.552-07:002019-05-20T17:07:00.552-07:00Klaudios Ptolemaios was a 2nd-century astronomer i...Klaudios Ptolemaios was a 2nd-century astronomer in Alexandria. His "Mathematike Syntaxis" (Mathematical Treatise, known as the "Almagest" -- "Almagestum" was a 12th-century Latin re-translatiion of the Arabic "al-Majisti"; the original Greek version would not be rediscovered until the 15th century) detailed a universe in which the stars and planets revolved around a motionless Earth. Ina later work he developed the notion that each planet moves on a small circle, called an epicycle, that moved on a larger one called a deferent. In 1660 Andreas Cellarius published "Harmonia Macrocosmica," which contained illustrations of various planetary theories, including the Ptolemaic conception. DuanesPoeTreehttps://www.blogger.com/profile/17053093400086634552noreply@blogger.com