The Danish Astronomer Who Was Given an Entire Island by the King of Denmark in 1576 to Build the Largest Pre-Telescopic Observatory in History
King Frederick II of Denmark granted Tycho Brahe the island of Hven in the Øresund Strait in February 1576 with funding to build a state-supported astronomical observatory. The resulting Uraniborg and Stjerneborg observatories operated from 1576 to 1597 and produced the most accurate pre-telescopic positional astronomy in history. The data set was the foundation on which Kepler's three laws of planetary motion were derived.
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