
Classical Stuff You Should Know 9: The Spheres
Nov 7, 2017
A tour of medieval cosmology and how earlier worldviews shape reading of ancient texts. The episode traces Mesopotamian and Greek flat-disk models into the Ptolemaic spherical system and the layered medieval cosmos. It explores the primum mobile, planetary order, music of the spheres, angelic inhabitants and how planets were thought to influence metals, health and temperament.
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Gilgamesh Crossing The Mountain Barrier
- A.J. recounts parts of the Epic of Gilgamesh where Gilgamesh passes mountains to reach the gods' realm and Utnapishtim.
- The example shows ancient cosmologies pictured a flat disk bounded by mountains and a cosmic sea.
Greek Disk And The Ocean River
- A.J. describes the Greek flat-disk model with an encircling Ocean River and the sun rising from and setting into it.
- He links Odysseus's underworld journey to passing this river and emerging among people of darkness.
Layered Geocentric Universe
- Medieval cosmology pictured a layered, geocentric universe with Earth at the bottom and heavenly spheres above moving toward God.
- A.J. explains the Ptolemaic model and the primum mobile as a harmony of motion driven by love for God.









