Associations
American Association Of Variable Star Observers (AAVSO)
Professional and Amateur collection, research, and analysis of variable star observations.
American Astronomical Society (AAS)
Established 1899, AAS is the major professional organization in North America for astronomers, other scientists and individuals interested in astronomy.
Association of Lunar & Planetary Observers
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…
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 Association of Geodesy
Member information, meeting announcements, publications and reports, awards, and links to related sites.
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.
Joint Organization for Solar Observations (JOSO)
Facilitates collaboration in solar phvsics among European solar astronomers. Contains details about JOSO's aims, structure, meetings and working groups.
Night Sky Live
A network of volunteers have cameras focused on the sky to create a 360 degree map of the planets and stars at one time. Data is fed into a computer and filtered for atmospheric i…
Royal Astronomical Society of Canada
Key activities include research and observing planets, stars, celestial phenomena and the abatement of light pollution.
Scientific Committee on Solar-Terrestrial Physics
Promotes international interdisciplinary programs in solar-terrestrial physics, and organizes and coordinates such programs. Site has a newsletter, meetings and events, member dir…
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.
The Webb Society
An international society of amateur and professional astronomers specialising in the observation of double stars and 'deep sky' objects, founded in 1967.
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