The International Union star astronomy (IAU), in the year 1319, was established. The goal of the organization's progress and maintain knowledge of Astronomy in all areas flared at the international level.

the members of this union in all over the world, the metal professionals that are degree Ph. D (doctoral) or higher and are in the activities of professional and teaching astronomy to participate. Of course, the IAU close relationships with organizations that are in the field of astronomy has..

Also, the IAU, as the reference valid in the astronomy task of naming celestial bodies and any side effects surface them.

scientific and educational activities of IAU by 11 academic departments, it can be done. And in that Section, more than 40 commissions, specialized in all fields of astronomy (including more than 70 groups) planned and executed) work.

the policies work long-term IAU by the General Assembly of the modal can be used by the executive to perform the looks. The tasks to be performed in the IAU day-to-day by the authorities do, and can be controlled. The focal point of all activities and research, the secretariat of the IAU in the Institute in France.