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240 BCE
eratosthenes
found out the size of the earth through mathematical equations, this was important because it showed just how big our earth was -
136
claudius ptolemy
believed that the earth was in the center of the universe, turns out his theory was wrong -
1532
nicolaus copernicus
said that the earth makes a full rotation daily and revolves around the sun annually, this is important because people now knew that a year is one rotation around the sun -
1546
Tycho brahe
during his time people believed earth was in the center and the sun rotated around us, Tycho proved this theory wrong. this discovery was important because people realized earth wasnt in the cetner -
johannes kepler
Keplerian Telescope was developed also known as a refracting telescope, this was important because it let him view objects in space and was one of the first telescopes -
Isaac Newton
Most known for his law of gravitation which was important and figuring out why planets revolve around the sun -
Albert Einstein
came up with the theory of relativity, this was important because it showed no matter if the speed of light is in a vacuum at which the observer travels