Tycho Brahe

From Conservapedia

Tycho Brahe (Dec 14, 1546 in Knudstrup - Oct 24, 1601 in Benátky near Prague) was a Danish astronomer who did the most precise measurements prior to the invention of the telescope. In 1572, he observed a super nova. He became court astronomer of the emperor Rudolf II in 1599. Here, in Prague, Johannes Kepler was his assistant. Brahe's astronomical observations permitted Kepler to derive his Laws of Planetary Motion.