Historical Timeline- AGE OF REASON
388 BC
Astronomy begins in Greece.
A Greek philosopher, Plato,was the founder of the Platonic Academy. This academy influenced people for the next two millenniums! He promoted the idea of the Earth being the center of the universe, and that everything revolves around it while it stays still (The Geocentric Theory)
335 BC - 323 BC
Aristotle, student of Plato, believed the same as Plato, that the earth is the center of the universe and everything revolves around it. He promoted Plato's Geocentric theory!
AD 98 - AD 168
Ptolemy was a Greek astrologer, mathematician, geographer, and astronomer. He was the person who discovered Retrogade motion. Retrogade motion is motion in the opposite direction to the movement of something else, and is the opposite of direct or Prograde motion.
1473 AD
Copernicus was a German mathematician and astronomer. He formed a heliocentric model, putting the sun in the center, not Earth. He wrote a book called "De Revolutionibus". But people did not receive it well
1572 AD
Tycho Brahe discovered a comet, and disapproved the Geocentric theory. He measured all eight planets in our solar system, using Kepler to calculate the mathematics.
1571-1630 AD
Kepler creates the three planetary laws:
1. Planets revolve around the sun in elliptical orbits
2. Equal area=equal time
3. For any planet, the square of its period of revolution is directly proportional to the cube of its mean distance from the sun.
1. Planets revolve around the sun in elliptical orbits
2. Equal area=equal time
3. For any planet, the square of its period of revolution is directly proportional to the cube of its mean distance from the sun.
1632 AD
Galileo was an Italian physicist, mathematician, astronomer, and philosopher. He is known for writing the book about the Heliocentric theory in Italian so that more people can grasp the knowledge.
Newton was said to be one of the most influential scientists in history! He proved the planetary motion theory using his theory of gravity! That proved the Heliocentric theory as correct. He created the Universal law of Gravitation, and the three laws of motion. He also invented calculus!