Web Directory by Internet-Web-Directory.com

The American Association of Variable Star Observers: Professional and Amateur collection,research, and analyses of variable star observations. Professional and Amateur collection, research, and analysis of variable star observations.

Established 1899, AAS is the major professional organization in North America for astronomers, other scientists and individuals interested in astronomy.

The Astronomical Society of the Pacific is an international nonprofit scientific and educational organization founded in 1889 that works to increase understanding and appreciation of astronomy. Disseminates astronomical information. The ASP has become the largest general astronomy society in the world, with members from over 70 nations.

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 the Earth's orientation for current use and long-term studies. Site describes the group's structure and function.

The International Occultation Timing Association, Inc. 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 occultations of stars by asteroids and planets, information on observing equipment and techniques, and reports to the members of observations made.

Facilitates collaboration in solar phvsics among European solar astronomers. Contains details about JOSO's aims, structure, meetings and working groups.

The Royal Astronomical Society of Canadais dedicated to the advancement of astronomy and allied sciences.Research and observing of planets, stars, stellar phenomena, galaxies,and other celestial bodies and the abatement of light pollution arekey activities. The RASC publishes the Observer's handbook, the JRASC, andBeginners Observing Guide. Key activities include research and observing planets, stars, celestial phenomena and the abatement of light pollution.

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, Regions, Astronomy Day, Awards.

The Astronomical Society of South Australia Web Site. 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 nights, circulating current astronomical information, and encouraging popular interest in Astronomy.

founded in 1919, has a mission to promote and safeguard the science of astronomy in all its aspects through international cooperation. With now over 8,300 individual members and 60 Adhering Countries worldwide, the IAU plays a key role in promoting and coordinating worldwide cooperation in astronomy. The IAU is also the sole internationally recognised authority for assigning designations to celestial bodies and surface features on such bodies.