Geocentric model and planets were holes in invisible wheels surrounding Earth; through the holes, humans could see concealed fire. About the same time, Pythagoras thought that the Earth was a sphere (in accordance with observations of eclipses), but not at the center; they believed that it was in motion around an unseen fire. Later these views were combined, so most educated Greeks from the 4th century BC on thought that the Earth was a sphere at the center of the universe. In the 4th century BC, two influential Greek philosophers, Plato and his student Aristotle, wrote works based on the geocentric model.
Aisle (political term) Aisle (political term) In the United States, the two major political parties, the Republicans and the Democrats, are often referred to as "the two sides of the aisle." Usage of the term "aisle" comes from the United States Congress. In the Senate, desks are arranged in the chamber in a semicircular pattern and the desks are divided by a wide central aisle. By tradition, Democrats sit on the right of the center aisle (as viewed from the presiding officer's chair) while Republicans sit on the left. Unlike in the Senate, there are no assigned desks in the House of Representatives