This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Almagestplanets.svg en Diagram of the geocentric epicyclic planetary model used in the en Almagest to describe the longitudinal motion of Venus Mars Jupiter and Saturn The Earth is represented by and the planet is represented by The direction is fixed and the lines labeled and are fixed in length The angles and increase at constant