Astronomical data refers to the collection and analysis of data related to celestial objects and events in the universe. This includes data gathered from telescopes, satellites, and other astronomical instruments, as well as theoretical models and simulations. Astronomical data is used to study the properties and behaviors of planets, stars, galaxies, and other cosmic phenomena, and to understand the origins and evolution of the universe. Researchers use advanced computer algorithms and data analysis techniques to process and interpret astronomical data, leading to new discoveries and advancements in the field of astronomy.