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Eratosthenes was the first to calculate the tilt of the Earth's axis. This helped us understand the seasons on Earth.
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Claudius Ptolemy compiled a star catalog and the earliest surviving table of a trigonometric function and established mathematically that an object and its mirror image must make equal angles to a mirror. His work enabled astronomers to make accurate predictions of planetary positions and solar and lunar eclipses
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First to propose that all planets revolve around the sun. This discovery helped us understand our place in the solar system.
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Tyco Brahe made observation of a supernova. This observation contributed to the understanding of the birth and death of stars.
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Johannes Kepler created the 3 laws of planetary motion that help us understand the function of our solar system.
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Sir Isaac Newton created the 3 laws of motion. This helped us understand the functionality of objects on earth.
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Albert Einsteins most notable contribution was his development of the Special Theory of Relativity. This helped us explain the behavior of objects in space and time.