[Observation] Size of deferents, epicycles [Modeling mechanism] Only ratio between radius of deferent and associated epicycle determined; absolute distances not determined in theory. [Object(s)] 
Planets
S t a r s
S u n
M o o n
T h e 5 p l a n e t s
P l a n e t s
I n t e r i o r p l a n e t s
E x t e r i o r p l a n e t s