... was an astronomer of Denmark, ordered the building of the Uraniborg, and owned a printing press. Nicholas Copernicus, born on February 19, 1473, was a mathematician, an astronomer, and a doctor, developed the Heliocentric Theory, thereby pushing astronomy far ahead. Johannes Kepler, an assistant of Tycho Brahe, was an astronomer and mathematician, and greatly helped the Scientific Revolution. Paracelsus was an alchemist and physician, changed his name twice ... , and invented the word alcohol (wikipedia.org). Important Renaissance authors were Andrea Alciato, Ludovico Ariosto, Leonardo B...

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