International Astronomical UnionThe International Astronomical Union (IAU) was founded in 1919. Its mission is to promote and safeguard the science of astronomy in all its aspects, including research, communication, education and development, through international cooperation. Its individual Members — structured into Divisions, Commissions, and Working Groups — are professional astronomers from all over the world, at the Ph.D. level and beyond, who are active in professional research, education and outreach in astronomy. The IAU also has Junior Members. The IAU has a total membership of 12754. The Individual and Junior Members Directory contains 12383 names in 92 countries worldwide. These Members are labeled as "active" in the IAU database meaning they have a valid email (are able to vote and stay connected to the IAU activities) and are affiliated to at least one Division. IAU membership spans 92 countries. Out of those countries, 85 are National Members. In addition, the IAU collaborates with various scientific organizations all over the world.