Hanapin
Epicycle
01
epiklo
(astronomy) a secondary circular orbit embedded within a primary circular orbit
Example
In his astronomical work the Almagest, Ptolemy used a system of deferents and epicycles to explain the observed motions of planets across the night sky.
Copernicus disagreed with the Ptolemaic model adding unnecessary epicycles, believing instead that planets revolve in simpler circular orbits around the Sun.
02
epicyclo
a small circle whose center moves around the circumference of a larger circle
Example
The concept of an epicycle allows for the modeling of complex periodic movements in geometry and astronomy.
The motion of a point on an epicycle can be described mathematically by combining the rotations of the smaller circle and the larger circle.
The geometric properties of an epicycle can be explored by examining the resulting curves and paths generated by its motion.
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