American Association Of Variable Star Observers (AAVSO)
Professional and Amateur collection, research, and analysis of variable star observations.
Astronomical Society of the Pacific
Disseminates astronomical information. The ASP has become the largest general astronomy society in the world, with members from over 70 nations.
European Association for Astronomy Education
Improves and promotes astronomical education at all levels in all institutions involved in teaching astronomy in Europe. Contains membership information, the group's history, news…
European Astronomical Society (EAS)
An association founded under the Swiss Civil Code in 1990. Its purpose is to contribute to and promote the advancement of astronomy in Europe.
International Earth Rotation Service (IERS)
Works to maintain the International Celestial Reference System and Frame, and the International Terrestrial Reference System and Frame, and to provide timely and accurate data on t…
International Occultation Timing Association - European Section (IOTA/ES)
Key activities include research and observing planets, stars, celestial phenomena and the abatement of light pollution.
International Occultation Timing Association (IOTA)
was established to encourage and facilitate the observation of occultations and eclipses. It provides predictions for grazing occultations of stars by the Moon and predictions for …
International Organisations for Archaeoastronomy / Cultural Astronomy
An association founded under the Swiss Civil Code in 1990. Its purpose is to contribute to and promote the advancement of astronomy in Europe.
The Astronomical League
is composed of over two hundred local amateur astronomical societies from all across the United States. Find out about our GREAT national conventions (ALCons)! Member Societies, Re…
The Astronomical Society of South Australia
founded in 1892, is the oldest society of its kind in Australia. Its objectives are to promote the Science of Astronomy and all its branches by holding regular meetings and viewing…
The International Astronomical Union (IAU)
Founded in 1919, has a mission to promote and safeguard the science of astronomy through international cooperation. The organization is also the internationally recognized authorit…
The Planetary Society
A nonprofit organization that promotes exploration of the solar system and the search for extraterrestrial intelligence.
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