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240 BCE
Eratosthenes
He was the first to calculate the circumference of the Earth. Also created the first map of the world. He also was able to figure out the exact tilt of the Earth. These measurements of the Earth are still in place till this day. -
150
Claudius Ptolemy
He wrote the Almagest. This treatise has defined astronomy for over 1,000 years. It included over 1,000 stars. It served as a basic guide for Islamic and European astronomers. -
1543
Nicolaus Copernicus
He discovered the heliocentric theory of the solar system. He argued about how Earth turns around an axis daily. He also demonstrated the correct order of all the planets. All the planets revolve around the Sun. The heliocentric theory did end up being true. -
Nov 11, 1572
Tycho Brahe
Tycho Brahe was able to discover The New Star just from observing the sky from his uncle's home. What he discovered went against the teachings of Aristotle. -
Johannes Kepler
He was best known for his planetary motion discovery. His discovery helps describe the orbit of planets around the sun. -
Sir Isaac Newton
He discovered the laws of physics and gravity. He helped shape what modern physics is today. -
Albert Einstein
He discovered the Theory of Relativity. It explains that everything is moving relative to everything else. It has changed our view on space and time indefinitely.