-
276 BCE
eratosthenes
discovered the size of the earth, could help us understand how gravity works -
130
claudius ptolemy
said earth is center of the solar system was false but helped us realize we aren't the only planet -
1500
nicolas copernicus
believed the sun was the center of the solar system, brought new ideas to the table and inspired Kepler and tycho early 1500s -
1500
tycho brache
discovered that the planets do not travel in a circular shape but a ellipse helped Kepler discover the three laws of planetary motion late 1500s -
johannes kepler
discovered the three laws of planetary motion, helped newton discover gravity -
sir isaac newton
discovered universal gravity, helps us understand why we stay close to the earth and the planets stay close -
albert einstein
discovered the mass and energy equivalence formula, E=mc2, helps us understand speed light late1800s early 1900s