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240 BCE
Eratosthenes
He invented a system of longitude and latitude and made a map of the world. He made his discovery in 240 BC and its important because he made the map of our known world right now. -
127 BCE
Claudius Ptolemy
Claudius made astronomical observations from Alexandria in Egypt during 127-41 AD. This is important because it was the first observation that we can date happen. -
1508
Nicolaus Copernicus
Nicolaus discovered every planet revolves around the sun in 1508-1514. His discovery was important because he was the first European to prove the planets revolve around the sun. -
1572
Tycho Brahe
Astronomical Discover: He discovered a new star called the Cassiopeia formation in 1572. This discovery is important because it proved the star was farther away then the moon among the stars. -
Johannes Kepler
Johannes discovered that planets move faster in their orbits when they are close to the sun in 1605. This is important because he discovered the orbit of Mars. -
Sir Isaac Newton
Newton discovered the laws of gravity and he worked on multiple principles of visible light. This is important because he made principles of the laws of motion. -
Albert Einstein
Albert Einstein published his theory of relativity in 1919. His discovery was important because his theory was a true understanding of space.