The International Astronomical Union (IAU) is a worldwide organization established in 1919, focused on advancing and protecting the science of astronomy. It brings together professional astronomers from across the globe to collaborate on research, education, and outreach initiatives. One of the IAU’s most notable roles is the official naming and classification of celestial bodies, such as stars, planets, and asteroids, ensuring consistent and accurate astronomical nomenclature. Additionally, the IAU sets standards for astronomical constants, coordinates scientific conferences, and works to engage the public in the wonders of astronomy. The IAU’s efforts contribute to the global development and dissemination of astronomical knowledge.