Tag: HW2
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Historical Astronomers in Context: Johannes Kepler
Background Johannes Kepler (December 27, 1571 to November 15, 1630) was important to astronomy for several reasons. He is most well-known for developing a model of planetary motion that fit Tycho’s data. Kepler’s first law states that the orbit of each planet is an ellipse with the Sun at one focus. His second law states…