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The Astronomical Society of South Australia was founded in 1892 and is the oldest society of its kind in Australia.

Key activities include research and observing planets, stars, celestial phenomena and the abatement of light pollution.

International Occultation Timing Association Administrative Website

an international society of amateur and professional astronomers specialising in the observation of double stars and deep sky objects

The world's largest and most popular trivia website with over one million trivia questions and quizzes.

Stellt verschiedene Webprojekte vor.

Works to maintain the International Celestial Reference System and Frame, and the International Terrestrial Reference System and Frame, and to provide timely and ...

Composed of over two hundred local amateur astronomical societies from across the United States. Information on national conventions (ALCons), member societies ...