How did Tycho Brahe improve the accuracy of astronomical observations?

Tycho Brahe significantly improved the accuracy of astronomical observations through his dedication to developing innovative instruments and establishing a systematic approach to recording celestial data. Recognizing that existing almanacs and ephemerides were often inaccurate, he devoted his career to accumulating precise measurements of the heavens.1

His key methods for improving accuracy included:

• Advanced Instrumentation: Brahe designed and utilized sophisticated tools, such as large quadrants, to measure the positions of stars and planets with unprecedented precision. His measurements achieved an accuracy of approximately 2 arc minutes, which remained the highest level of precision possible before the invention of the telescope.12
• Dedicated Observatories: He established Uraniborg, a state-of-the-art observatory on the island of Ven, which served as a center for regular, long-term celestial monitoring.1
• Systematic Data Collection: By surrounding himself with assistants and craftsmen, Brahe ensured that observations were conducted consistently and recorded meticulously. This comprehensive study of the solar system and the positions of over 777 fixed stars provided the empirical foundation that later allowed Johannes Kepler to formulate his laws of planetary motion.1