The Astronomisches Rechen-Institut , or ARI, is a research institute in Heidelberg, Germany. The ARI is currently part of the Zentrum für Astronomie der Universität Heidelberg ". Formerly, the ARI belonged to the state of Baden-Württemberg.
The ARI has a rich history. It was founded in 1700 in Berlin-Dahlem by Gottfried Kirch. It had its origin in a patent application by Frederick I of Prussia, who introduced a monopoly on publishing star catalogs in Prussia. In 1945 the Institute was moved by the Americans nearer to their headquarters in Heidelberg. Since January 1, 2005 the ARI has been integrated into the Zentrum für Astronomie . The other two institutes in the ZAH are the Institut für Theoretische Astrophysik and the Landessternwarte Heidelberg-Königstuhl .
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