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194 BCE
Eratosthenes
-Made the first measurement of the Earth. This was important because it showed us how big our planet was. -
170
Claudius Ptolemy
- Made a star catalog. This was important because it shows it how many stars and where the stars were.
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May 24, 1543
Nicolaus Copernicus
- Proposed that the sun was in the center of the universe. This is important because it was a major true discovery.
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Tycho Brahe
- discovered the “New Star.” It was important because the star was farthest from the moon.
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Johannes Kepler
- He was best known for his laws of planetary motion. This was important because it helped us know how our planet and the planets around us moved.
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Sir Isaac Newton
- Created Newton’s method. It was important because it shows us the root of math problems.
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Albert Einstein
-Developed the theory of relativity. This was important because it proved that gravity moves instead of being straight lines.