Stjerneborg is an astronomical observatory located on the island of Ven in Sweden. Built in the 16th century by the Danish astronomer Tycho Brahe, it served as a research facility for his studies of the stars and planets. The observatory features a series of towers and buildings designed to facilitate precise astronomical observations. The name "Stjerneborg" translates to "Star Castle," reflecting its purpose as a center for celestial studies. Tycho Brahe's work at Stjerneborg laid the groundwork for modern astronomy, influencing later scientists like Johannes Kepler. Today, the site is a historical landmark and attracts visitors interested in astronomy and history.