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240 BCE
The measure of Earth
Eratosthenes used the Sun to measure the Earth when everyone thought the Earth was flat, he was only 211 miles away from the true measurement. -
Period: 127 BCE to 141 BCE
Ptolemaic System
Claudius Ptolemy represented the epitome of knowledge of Grecian astronomy. -
1543
Model of the Solar System
Nicolaus Copernicus made a model of the Solar System in which the Earth revolved around the Sun, this changed the way many scientists viewed the solar system. -
Period: 1546 to
Earth was the center of the universe
Tycho Brahe labored to proof that Earth was the center of the universe and his data was eventually used by Kepler -
The three Laws of Planetary motion
With Johannes Keplers' laws of Planetary motion he was able to predict the future positions of planets with much greater accuracy. -
Period: to
Laws of Motion
Sir Isaac Newton published "Philosophiae Naturalis Principia Mathematica" which is perhaps the greatest scientific work in history. -
Period: to
Space-time
Albert Einstein proposed a new way of looking at the universe that went beyond current understanding