International and multinational organizations
- International Astronomical Union (IAU) – Established in 1919; a global federation of professional astronomical societies and institutions that coordinates astronomical research, naming conventions, and standards.
- International Astronomical Union’s Working Group on the History of Astronomy (IAU‑HISTORY) – Facilitates collaboration among historians and astronomers worldwide.
North America
- American Astronomical Society (AAS) – United States, founded 1899; the principal professional organization for astronomers in the U.S., publishing The Astrophysical Journal and Astronomical Journal.
- Astronomical Society of the Pacific (ASP) – United States, founded 1889; originally a professional society, now focused on education and public outreach, publishing Planetary Science Journal.
- Royal Astronomical Society of Canada (RASC) – Canada, founded 1903; national organization for professional and amateur astronomers, with regional branches across the country.
- Society for Astronomical Sciences (SAS) – United States, founded 1972; primarily supports small‑telescope research and promotes collaboration among professional and amateur observers.
Europe
- Royal Astronomical Society (RAS) – United Kingdom, founded 1820; a leading professional society that publishes Monthly Notices of the Royal Astronomical Society and Geophysical Journal International.
- British Astronomical Association (BAA) – United Kingdom, founded 1890; the largest UK amateur astronomy society, organizing observations, meetings, and publications such as JBAA.
- Société astronomique de France (SAF) – France, founded 1887; promotes astronomy to the public and supports both amateur and professional activities.
- Astronomische Gesellschaft (AG) – Germany, founded 1863; one of the world’s oldest professional societies, co‑organizer of the annual meeting “Astronomy Day” and publisher of Astronomische Nachrichten.
- Italian Astronomical Society (Società Astronomica Italiana, SAIt) – Italy, founded 1993; serves professional and amateur astronomers, organizing conferences and public events.
- Netherlands Astronomical Society (Nederlands Astronomisch Genootschap, NAG) – Netherlands, founded 1899; provides a forum for Dutch astronomers and publishes Astronomie, Verhandelingen en Verslaggeving.
Asia
- Astronomical Society of Japan (ASJ) – Japan, founded 1930; a professional society publishing Publications of the Astronomical Society of Japan.
- Indian Astronomical Society (IAS) – India, founded 1948; promotes research and education in astronomy, publishing the Journal of the Indian Academy of Sciences (Astronomy & Astrophysics).
- Chinese Astronomical Society (CAS) – China, founded 1979; the principal professional body for Chinese astronomers, coordinating national research programs.
- Korean Astronomical Society (KAS) – South Korea, founded 1974; facilitates collaboration among Korean astronomers and hosts annual scientific meetings.
Oceania
- Astronomical Society of Australia (ASA) – Australia, founded 1966; a professional organization that publishes Publications of the Astronomical Society of Australia.
- New Zealand Astronomical Society (NZAS) – New Zealand, founded 1975; supports both professional and amateur astronomers, organizing outreach events and conferences.
Africa
- South African Astronomical Society (SAAS) – South Africa, founded 1905; serves the professional astronomy community, publishing South African Journal of Science (Astronomy section).
- Egyptian Astronomical Society (EAS) – Egypt, founded 1991; promotes astronomy research and education within Egypt and the Arab world.
South America
- Brazilian Astronomical Society (Sociedade Brasileira de Astronomia, SBA) – Brazil, founded 1991; coordinates professional activities and public outreach across Brazil.
- Argentinian Astronomical Society (Sociedad Argentina de Astronomía, SAA) – Argentina, founded 1931; organizes conferences and publishes Boletín de la Sociedad Argentina de Astronomía.
Other notable national or regional societies
- Polish Astronomical Society (Polskie Towarzystwo Astronomiczne, PTA) – Poland, founded 1923.
- Czech Astronomical Society (Česká astronomická společnost, ČAS) – Czech Republic, founded 1923.
- Swedish Astronomical Society (Svenska Astronomiska Sällskapet) – Sweden, founded 1915.
- Finnish Astronomical Society (Suomen Tähtitieteellinen Yhdistys) – Finland, founded 1922.
These societies collectively support research, education, and public outreach in astronomy across the globe. Their activities include organizing conferences, publishing scientific journals and newsletters, providing awards and grants, and fostering collaboration among amateur and professional astronomers.
