International Astronomical Union

• 1. Founding And Early History

  ›

  The International Astronomical Union opened its doors on the 28th of July 1919 in Brussels, Belgium. This meeting marked a new era for global astronomy after World War I ended just months earlier. Seven nations formed the initial core: Belgium, Canada, France, Great Britain, Greece, Japan, and the United States. Italy and Mexico joined shortly after these founding members. Benjamin Baillaud from France served as the first President while Alfred Fowler from the UK acted as General Secretary. William Campbell from the US, Frank Dyson from the UK, Georges Lecointe from Belgium, and Annibale Riccò from Italy became vice presidents. Thirty-two Commissions were appointed at this Brussels assembly to handle topics ranging from relativity to minor planets. The first General Assembly took place in Rome, Italy between the 2nd and the 10th of May 1922. By that time ten additional countries had joined including Australia, Brazil, Czechoslovakia, Denmark, the Netherlands, Norway, Poland, Romania, South Africa, and Spain.

• 2. Governance And Membership Structure

  ›

  As of the 1st of August 2019 the organization counted 13,701 individual members across 102 countries worldwide. Eighty-one point seven percent of those individual members were male while 18.3 percent were female. National members include professional astronomical communities representing their country's affiliation with the Union. Examples include the Australian Academy of Science, the Chinese Astronomical Society, and the French Academy of Sciences. The sovereign body is its General Assembly which comprises all members. Voting rights vary based on the type of business under discussion. Issues of a primarily scientific nature allow only individual members to vote. All other matters restrict voting to representatives of national members. Budget votes carry weight according to the relative subscription levels of national members. A second category vote requires at least two-thirds of national members to be valid. An absolute majority suffices for approval except when Statute revision demands a two-thirds majority. Equality in votes resolves through the President of the Union casting the deciding ballot.

• 3. Naming Authority And Standards

  ›

  The IAU serves as the recognized authority for assigning designations and names to celestial bodies. This includes stars planets asteroids and any surface features found upon them. The Working Group for Planetary System Nomenclature maintains these conventions for planetary bodies. Another group called the Working Group on Star Names catalogues and standardizes proper names for stars. The organization also coordinates with partners like UNESCO to fulfill its mission. In 2015 and 2019 the Union held NameExoWorlds contests to name exoplanets. Starting in 2024 the Union partnered with the United Nations to develop legislation for lunar industrialization. These efforts ensure uniform definitions exist for astronomical principles across the globe. The Minor Planet Center operates under the IAU as a clearinghouse for all non-planetary or non-moon bodies in the Solar System.

• 4. Scientific Commissions And Working Groups

  ›

  The International Central Bureau of Astronomical Telegrams initially sat in Copenhagen, Denmark following the 1919 founding. Today it produces and distributes astronomical telegrams on behalf of the Union. The Minor Planet Center functions as a central hub for tracking objects outside our solar system's major bodies. Commission 46 plays a special role in discussing astronomy development with governments and scientific academies. Teaching Astronomy for Development targets countries where there is currently very little astronomical education. The Galileo Teacher Training Program emerged from the International Year of Astronomy 2009 initiative. Hands-On Universe concentrates resources on education activities for children and schools designed to advance sustainable global development. A strategic plan covering the period 2010, 2020 has been published by this commission. These groups allow astronomers to focus their research while maintaining standardized protocols globally.

• 5. General Assemblies And Global Conferences

  ›

  Since 1922 the General Assembly meets every three years except during World War II between 1938 and 1948. An Extraordinary IAU General Assembly occurred in September 1973 in Warsaw Poland to commemorate Nicolaus Copernicus. This meeting followed the regular session held earlier that year in Sydney Australia. The first assembly took place in Rome Italy while subsequent meetings visited Cambridge England Leiden Netherlands and Cambridge Massachusetts. Later gatherings included Stockholm Sweden Zürich Switzerland Dublin Ireland Moscow Soviet Union and Berkeley California. Recent history shows meetings in Beijing China Rio de Janeiro Brazil and Busan South Korea. The upcoming 34th General Assembly will take place in Santiago Chile in 2030. These triennial events set policy and include various scientific meetings that shape international astronomy standards.

• 6. Education Initiatives And Outreach Programs

  ›

  Commission 46 seeks to develop information or improve astronomical education worldwide. Part of its work involves the Teaching Astronomy for Development program in countries with minimal existing instruction. The Galileo Teacher Training Program focuses on transferring tools into classroom science curricula effectively. Hands-On Universe concentrates resources on education activities for children and schools designed to advance sustainable global development. A strategic plan for the period 2010, 2020 has been published by this commission. In 2004 the IAU contracted with Cambridge University Press to publish the Proceedings of the International Astronomical Union. The Communicating Astronomy with the Public Journal Working Group prepared a study assessing feasibility in 2007. These initiatives encourage countries to become members of the IAU through educational engagement.