The International Astronomical Union (IAU) unites national
astronomical societies from around the world. It also acts as the internationally recognized authority for assigning designations to celestial bodies (
stars,
planets,
asteroids, etc.) and any surface features on them, and is a member of the
International Council for Science (ICSU). The main aim of the IAU is to promote and safeguard the science of astronomy in all its aspects through international cooperation. Headquartered in Paris, France, its individual members are professional astronomers from all over the world, at the Ph.D. level or beyond, and active in professional research and education in astronomy. The IAU maintains friendly relations with organizations that include amateur astronomers in their membership. National Members are usually those with a significant level of professional astronomy.
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