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Title page for the 'Rudolphine Tables' (Tabulae Rudolphinae, 1627) by German astronomer Johannes Kepler (1571-1630). Using observations by Danish astronomer Tycho Brahe (1546-1601), these astronomical tables were the most accurate of the time. Kepler (who had worked with Tycho on the later observations) took 26 years to finish the task, the completion of which was entrusted to him by Tycho on his deathbed. The tables were completed in 1624 and published three years later. They were named for Holy Roman Emperor Rudolf II, and also funded by his successors Matthias and Ferdinand II. The three imperial patrons are named at centre.
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