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A very comprehensive collection of information useful and interesting to amateur astronomers, especially those located in Utah. Includes events, news, data and reference materials, and a weekly viewing conditions forecast. Has a special section about light pollution.
www.utahskies.org
American Astronomical Society (AAS)
Established 1899, AAS is the major professional organization in North America for astronomers, other scientists and individuals interested in astronomy.
www.aas.org
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 authority for assigning designations to celestial bodies and surface features on such bodies.
www.iau.org
Association of Lunar & Planetary Observers
www.lpl.arizona.edu
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 occultations of stars by asteroids and planets, information on observing equipment and techniques, and reports to the members of observations made.
www.occultations.org
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.
www.astroleague.org
American Association Of Variable Star Observers (AAVSO)
Professional and Amateur collection, research, and analysis of variable star observations.
www.aavso.org
International Organisations for Archaeoastronomy / Cultural Astronomy
www.le.ac.uk
A nonprofit organization that promotes exploration of the solar system and the search for extraterrestrial intelligence.
planetary.org
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 nights, circulating current astronomical information, and encouraging popular interest in Astronomy.
www.assa.org.au
An international society of amateur and professional astronomers specialising in the observation of double stars and 'deep sky' objects, founded in 1967.
www.webbsociety.freeserve.co.uk
Royal Astronomical Society of Canada
Key activities include research and observing planets, stars, celestial phenomena and the abatement of light pollution.
www.rasc.ca
International Occultation Timing Association - European Section (IOTA/ES)
www.iota-es.de
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.
joso.oat.ts.astro.it
International Association of Geodesy
Member information, meeting announcements, publications and reports, awards, and links to related sites.
www.gfy.ku.dk