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240 BCE
Eratosthenes
He measured the size of earth in 240 B.C. This is important because he also made longitude and latitude which help us know exact locations. -
127
Claudius Ptolemy
He thought that the planets orbited around earth and made a model. This is important because even thought it's wrong, we know what past astronomers visualized the universe to be like. -
1514
Nicolaus Copernicus
Copernicus wrote a book and made a theory in which the earth revolved around the sun. This is important because during this time, many thought that earth was the center of the universe. -
1572
Tycho Brahe
He proved that the universe changed. Before, people thought that the heavens never changed. -
Johannes Kepler
Kepler discovered that planets orbited in ellipses. He also said that the sun was at the center of the solar system and that planets didn't all orbit at the same rate. However, many disagreed but he stuck to his theories. -
Sir Isaac Newton
He came up with 3 laws of motion. He basically theorized the concept gravity. Without his discoveries, the science field would be very different and we wouldn't have things like calculus. -
Albert Einstein
Einstein came up with the laws of physics. His laws are important because they were used to make things like television and even the big bang theory.