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International Astronomical Union

association of professional astronomers

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 21, 2026
Entity authorityQ6867 ↗
Source-derived summary

The International Astronomical Union (IAU; French: Union astronomique internationale, UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded on 28 July 1919 in Brussels, Belgium, and is based in Paris, France.

The IAU is composed of individual members, who include both professional astronomers and junior scientists, and national members, such as professional associations, national societies, or academic institutions. Individual members are organised into divisions, committees, and working groups centered on particular subdisciplines, subjects, or initiatives. As of May 2024, the Union had 85 national members and 12,734 individual members, spanning 90 countries and territories.

Among the key activities of the IAU is serving as a forum for scientific conferences. It sponsors nine annual symposia and holds a triannual General Assembly that sets policy and includes various scientific meetings. The Union is best known for being the leading authority in assigning official names and designations to astronomical objects, and for setting uniform definitions for astronomical principles. It also coordinates with national and international partners, such as UNESCO, to fulfill its mission.

The IAU is a member of the International Science Council, which is composed of international scholarly and scientific institutions and national academies of sciences.

Editorial summary

“International Astronomical Union” enters the record as association of professional astronomers. Crown Archives preserves that source wording while asking what International, Astronomical and Union can confirm, complicate or overturn.

Editorial reviewA strong contextual entry point for chronology, institutions and public events when official records are distinguished from later interpretation. The current lead gives the account dated anchors—1919, 2024—that can be checked directly. The selected authority fields contribute no independent date. Its strongest next move is a source search built around International, Astronomical and Union.
Editorial analysis

Why this record matters

“International Astronomical Union” is worth following because a concise public description often conceals a longer documentary argument. Here, International, Astronomical and Union provides the most credible route into that argument.

Evidence profile

Contemporary correspondence, administrative files and participant testimony can test how later narratives organized the event or institution. The source revision retrieved here is dated Sep 21, 2026. The linked authority identifier is Q6867. The first chronological checks are 1919 and 2024.

Critical limits

Later summaries often reconcile disputed chronology or motive more neatly than the contemporary record permits. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Compare institutional narratives with records created by participants and affected communities. Dates and formal titles are useful anchors, but not substitutes for context.

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  • Event chronology
  • Institutional context
  • Locating named record creators
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Contemporary correspondence, government or organizational records, oral histories and cited historical scholarship.

Three-step research path

  1. Establish the record: confirm the title “International Astronomical Union”, its source revision and the description used here.
  2. Expand the search: follow International Astronomical Union primary sources, International Astronomical Union archive and International research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “International Astronomical Union”?
  2. Which voices are present, absent or mediated by the institution?
  3. What chronology connects this entry to wider political or social change?
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Source & attribution

This entry incorporates text from “International Astronomical Union” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.