The Tycho Catalog

The Tycho Catalog is a detailed astronomical database that contains precise information about over a million stars in our galaxy. Created from data collected by the Hipparcos satellite in the late 1980s and early 1990s, it includes star positions, brightness, and movement. This catalog helps astronomers study the universe, track stellar motions, and navigate space. It's a fundamental resource for understanding the structure and dynamics of our galaxy, providing accurate measurements that support both scientific research and practical applications like telescope calibration and space exploration.