Johannes Kepler by Daniel E. Harmon

112 pages first pub 2017 (editions)

nonfiction biography science technology young adult medium-paced
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Johannes Kepler was just twenty-three years old when he became a teacher of mathematics and astronomy at the university in Graz, Austria, in 1594. For the next thirty-five years, his intensive research based on the theories of Nicolaus Copernicus ...

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