Geocentric model fire being lighter than air. Beyond the layer of fire, were the solid spheres of aether in which the celestial bodies were embedded. They, themselves, were also entirely composed of aether. Adherence to the geocentric model stemmed largely from several important observations. First of all, if the Earth did move, then one ought to be able to observe the shifting of the fixed stars due to stellar parallax. In short, if the Earth was moving, the shapes of the constellations should change considerably over the course of a year. If they did not appear to move, the stars are either
Catholic (term) then also to the teaching of the church fathers and the councils". The term "Catholic" is commonly associated with the whole of the church led by the Roman Pontiff, the Catholic Church. Other Christian churches that use the description "Catholic" include the Eastern Orthodox Church and other churches that believe in the historic episcopate (bishops), such as the Anglican Communion. Many of those who apply the term "Catholic Church" to all Christians object to the use of the term to designate what they view as only one church within what they understand as the "whole" Catholic Church. In the English