A "Star Catalog" is a systematic list of stars, often organized by specific criteria such as brightness, position, or distance from Earth. These catalogs serve as essential tools for astronomers, helping them identify and study celestial objects. Some well-known examples include the Hipparcos Catalog and the Henry Draper Catalog, which provide detailed information about thousands of stars. Star catalogs typically include data such as the star's name, coordinates, and brightness. They can also contain additional information like spectral type and distance. By using these catalogs, astronomers can better understand the structure and evolution of our Milky Way Galaxy and the universe beyond.