Geocentric model wasn't until Kepler demonstrated a physical observation that could show that the physical sun is directly involved in determining an orbit that a new model was required. The Ptolemaic order of spheres from Earth outward is: Ptolemy did not invent or work out this order, which aligns with the ancient Seven Heavens religious cosmology common to the major Eurasian religious traditions. It also follows the decreasing orbital periods of the moon, sun, planets and stars. Muslim astronomers generally accepted the Ptolemaic system and the geocentric model, but by the 10th century texts appeared regularly whose subject matter was doubts concerning
Central Illinois Regional Airport for the Central Illinois Air Derby. Billed at the time as the greatest such event in Illinois outside of Chicago, the show included four U.S. Army "ships" from Chanute Field in Rantoul, civilian aviators from places like Aurora, Champaign, Joliet and Kankakee, aerial "stunting" contests and races, parachutists and an air parade over downtown Bloomington. Despite the efforts of local aviation enthusiasts and the business community, attempts to establish long-term passenger service at the Normal field ended in failure. In the fall of 1931, Century Air Lines added Bloomington to its Chicago-to-St. Louis route, and the little grassy square (recently