The Geocentric Model

The model, codified by Ptolemy, in which the Earth sits motionless at the centre of the cosmos while the Sun, Moon, planets, and stars revolve around it on a system of circles and epicycles. It explained the observed motions well enough to dominate astronomy for over 1,400 years before being overturned by heliocentrism.

• The Galilean Moons of Jupiter1610 CE
• The Phases of Venus1610 CE

• Almagestc. 150 CE

• Refuted byThe Galilean Moons of Jupiter
• Refuted byThe Phases of Venus
• Introduced byAlmagest
• Developed byPtolemy
• Part ofGreek Astronomy