astronomical catalogs

Astronomical catalogs are comprehensive lists of celestial objects, such as stars, galaxies, and nebulae, organized by their positions and properties. These catalogs are created through observations from telescopes and help astronomers locate and study different objects in the universe. Each object is assigned a unique identifier, making it easier for researchers to share and compare data. Notable catalogs include the Messier Catalog, which lists bright objects visible from Earth, and the Hipparcos Catalog, focused on star positions. By providing standardized information, these catalogs are essential tools for advancing our understanding of the cosmos.