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From Citizendium, the Citizens' Compendium

This is a list of astronomical organisations around the world.

International Organisations

• IAU - International Astronomical Union
• AURA - Association of Universities for Research in Astronomy
• IOAA - International Olympiad of Astronomy and Astrophysics

Space Agencies

• NASA - National Aeronautics and Space Administration (USA)
• ESA - European Space Agency

Others

• AAVSO - American Association of VAriable Star Observers
• RAS - Royal Astronomical Society
• Webb Society