Geocentric model knew about Tusi's work or that of the Maragha school. Not all Greeks agreed with the geocentric model. The Pythagorean system has already been mentioned; some Pythagoreans believed the Earth to be one of several planets going around a central fire. Hicetas and Ecphantus, two Pythagoreans of the 5th century BC, and Heraclides Ponticus in the 4th century BC, believed that the Earth rotated on its axis but remained at the center of the universe. Such a system still qualifies as geocentric. It was revived in the Middle Ages by Jean Buridan. Heraclides Ponticus was once thought to have proposed
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