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He calculates the Earth's circumference.
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Ptolemy proposed his refined geocentric model.
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Copernicus finished the first manuscript of his book in which he established that the planets orbited the sun.
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Published the Tychonic system, scheme for the structure of the solar system. Essentially a diagram where it shows that the Sun was the center.
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Improved the telescope.
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Kepler published Astronomia Nova, which talked about his discoveries, which are now called Kepler's two laws of planetary motion.
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Discovered the Baconian method, also known as the scientific method.
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Discovered analytic geometry. Descartes also introduced the Cartesian Doubt, along with the idea of skepticism.
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Published the theory of gravity.
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Wrote his Second Treatise of Government at the time of England's Glorious Revolution, which overthrew the rule of James II.
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Published the Periodic Table.
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The Curies discover the existence of the elements radium and polonium.
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Discovered about 2,400 variable stars.
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Proposed his theory of continental drift.
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Discovered that countless galaxies exist beyond our galaxy.
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Proposed the seafloor spreading hypothesis.
