His next step was to build his own equipment and observatory on the small island of Hven in Copenhagen Sound between Sweden and Denmark. It was here that Kepler would visit, scrutinize Brahe's data and then publish his three laws of planetary motion.
Today tourists may visit Hven. Though Danish, the ferry departs from the Swedish side of the Sound. No automobiles are permitted on the island.
Tourists may also visit Brahe's burial memorial in the Church of Our Lady before Tyn near the center of Prague's main square. A Danish flag stands beside his grave.