The United States Naval Observatory (USNO) is a scientific agency of the U.S. Navy located in Washington, D.C. Established in 1830, it plays a crucial role in timekeeping and celestial navigation. The USNO maintains precise time standards and provides astronomical data to support various military and civilian applications. In addition to timekeeping, the USNO conducts research in astronomy and astrophysics. It operates telescopes and engages in projects that enhance our understanding of celestial bodies. The observatory also contributes to the global positioning system (GPS) and collaborates with other scientific organizations to advance space science.