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Aristotle creates the first model of the solar system, a geocentric model.
Aristotle is born
Aristotle introduces the idea that the Earth is spherical.
Ptolemy is born
Copernicus presents his heliocentric theory.
Ptolemaic system is introduced, showing the Earth as a stationary object at the center of the universe. Unlike Aristotle's geocentric model, the orbits of the Sun, Moon, and other planets are ecliptic.
Copernicus is born
Copernicus publishes his heliocentric model (the book is banned by the Catholic Church in 1616)
Galileo is born
Galileo discovers the 4 main moons of Jupiter and the phases of Venus. He also invents the most powerful telescope at the time.
Brahe is born
Brahe publishes his modified Copernican model, in which the planets orbit the Sun, which revolves around a stationary Earth (Part heliocentric, part geocentric).
Kepler is born
Kepler publishes his three laws of planetary motion.
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