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Reference.org
Rudolphine Tables
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<p> The <i>Rudolphine Tables</i> consist of a <a href="/facts/Star_catalogue/7XwPwSjE">star catalogue</a> and planetary tables published by <a href="/facts/Johannes_Kepler/wk6GTN3C">Johannes Kepler</a> in 1627, using observational data collected by <a href="/facts/Tycho_Brahe/HroPxnCq">Tycho Brahe</a> (1546–1601). The tables are named in memory of <a href="/facts/Rudolf_II%2c_Holy_Roman_Emperor/XoKJsYAd">Rudolf II, Holy Roman Emperor</a>, in whose employ Brahe and Kepler had begun work on the tables. The main purpose of the Rudolphine tables was to allow the computation of the positions of the then known <a href="/facts/Planet/rbPjE6Bx">planets</a> of the <a href="/facts/Solar_System/QIcLSazQ">Solar System</a>, and they were considerably more precise than earlier such tables. </p>