American Association of Variable Star Observers (AAVSO) – Professional and amateur collection, research, and analyses of variable star observations.
Association of Universities for Research in Astronomy – AURA is a consortium of universities, and educational and other not-for-profit institutions, that operates world-class astronomical observatories.
The American Meteor Society – A non-profit scientific organization established to encourage and support the research activities of both amateur and professional astronomers who are interested in the fascinating field of Meteor Astronomy.
The American Association of Amateur Astronomers – Information about the association, observing programs, and an excellent guide to the constellations and the planets.
Students for the Exploration and Development of Space – SEDS is an independent, student-based organization that promotes the exploration and development of space.
St. Louis Astronomical Society – The website contains meeting announcements, clear sky clocks, and a list of regional and national star parties.
Astronomical Association of Northern California – The AANC was created to facilitate the flow of astronomical information among the various segments of the astronomical community in the Northern California area.
The Albuquerque Astronomical Society (TAAS) – A non-profit, all volunteer organization that promotes astronomy education in the community through school star parties, public astronomy opportunities, and operation of an observatory facility near Albuquerque, New Mexico.
Amateur Astronomers, Inc. – One of the largest astronomy clubs in the United States, located at William Miller Sperry Observatory in Cranford, NJ.
Amateur Observers’ Society of New York – Created in order to bring together astronomy enthusiasts and people of all ages who enjoy sharing their fascination with anything related to astronomy.
Northern Colorado Astronomical Society – Includes meeting information, newsletter, calendar of events and links to various astronomy websites.
Bucks-Mont Astronomical Association – A group of amateur astronomers in Southeastern Pennsylvania.
Kalamazoo Astronomical Society – The Society hosts many exciting and informative activities for stargazers both young and old at the Kalamazoo Nature Center in Michigan.
Everett Astronomical Society – The Society consists of a group of about 45 individuals in and around Everett and the Snohomish County.
Museum Astronomical Resource Society – Provides news and astronomical information to the membership and public located in Tampa, Florida.
Rose City Astronomers – RCA, located in Portland, Oregon, is the largest amateur astronomy club in the Pacific Northwest.
Astronomical Society of Long Island – One of the most active clubs in the tristate area for beginners and advanced amateurs.
South Shore Astronomical Society – Active amateur astronomy club based in Norwell, Massachusetts. Check out the upcoming events page for observing sessions.
Charlottesville Astronomical Society – An organization founded to promote the enjoyment of astronomical observing and learning in the Central Virginia area.
Astronomical Society of the Pacific – An international nonprofit scientific and educational organization founded in 1889, that works to increase understanding and appreciation of astronomy.
Big Bend Astronomical Society – A group of amateur and professional astronomers that host regularly scheduled star parties in the Alpine, Texas vicinity.
Amateur Astronomers Association of New York City – Information about the association, observing tips and articles.
Sonoma County Astronomical Society – Organization for those interested in astronomy and telescope making, with meetings for lectures, demonstrations, star parties and more.
Central Texas Astronomical Society – Promotes interest and research in astronomy in Central Texas and throughout the world.
Von Braun Astronomical Society – A volunteer organization of amateur and professional astronomers located in Huntsville, Alabama.
Arkansas Oklahoma Astronomical Society – Not-for-profit organization with a primary focus in the region around Fort Smith, Arkansas.
Central Coast Astronomical Society – Sharing the night sky with residents of San Luis Obispo County, California, since 1979.
Westchester Amateur Astronomers, New York – A not-for-profit organization open to all with a desire to learn more about astronomy and telescopes.
Lake County Astronomical Society – Information about the society and a great deal of resources for amateur astronomers.
Calumet Astronomical Society – A non-profit society with the purpose of pursuing the study of astronomy and promoting the education of astronomy and space science.
Penn State Astronomy Club – Club history, calendars of events, and an astrophotography gallery.
Amateur Astronomers Association of Pittsburgh – Promoting popular astronomy in western Pennsylvania.
Skokie Valley Astronomers – A club devoted to amateur astronomy, located in Deerfield, Illinois.
Wabash Valley Astronomical Society – Observatory information, activities and first telescope tips.
Central Valley Astronomers – A group of astronomy enthusiasts, located in Fresno area of California Central Valley.
EAS Home Page – Web page of the Everglades Astronomical Society in Naples, Florida.
Battle Point Astronomical Association – A non-profit amateur astronomy organization, located in Bainbridge Island, Washington.
Ohio Valley Astronomical Society – A Huntington, West Virginia – based Astronomical Society serving the Tri-State area.
Baton Rouge Astronomical Society – The site contains astrophotos taken by members and monthly observing information.
Muskegon Astronomical Society – The activities of the society give amateur astronomers, from the Muskegon Michigan area, opportunities to meet and share experiences with others interested in amateur astronomy.
Student Astronomers at Harvard-Radcliffe – A student organization aimed at providing opportunity for the Harvard community to learn more about astronomy as well as enjoy looking at the night sky.
Aldrich Astronomical Society – An amateur astronomy club that is based in the Worcester Massachusetts area.
North Houston Astronomy Club – A non-profit organization sponsored by Kingwood College, dedicated to increasing the awareness and knowledge of the science of Astronomy.
Delaware Valley Amateur Astronomers – A group of enthusiastic hobbyists who live in and around Philadelphia, Pennsylvania.
Fraser Valley Astronomers Society – A dedicated and active astronomy club, which prides itself on education, telescope making, and preserving the night sky.
Royal Astronomical Society of Canada, Montreal Centre – The website gives astro information, an image gallery, observing tools, and a members only section.
Royal Astronomical Society of Canada, Edmonton Centre – Dedicated to the advancement of astronomy and informing the general public about astronomy.
Astro Club Borealis – The amateur astronomy club in New Brunswick.
Victoria Centre, RASC – Victoria Centre is part of the national Royal Astronomical Society of Canada, which is dedicated to bringing information about astronomy to the general public.
Hamilton Amateur Astronomers – Information about the club and its members, astronomy news and astrophotography galleries.
Blackpool and District Astronomical Society – Society formed in November 1986 by a small group of keen amateur astronomers living in Blackpool.
Wolverhampton Astronomical Society – An amateur astronomical society with over 50 years experience in promoting astronomy and space exploration.
Macclesfield Astronomical Society – The Macclesfield Astronomical Society, founded in 1990, meets three times a month for a Beginners class, Workshop and a main Lecture.
Bristol Astronomical Society – Dedicated in educating the public to the splendours of the night sky and all aspects of astronomy.
South West Herts Astronomical Society – Information about the society, as well as images and observation log books contributed by members.
Eastbourne Astronomical Society – Web page of the Eastbourne Astronomical Society in East Sussex.
Knowle Astronomical Society – Includes information about the society, articles, monthly sky maps, and a picture gallery.
Sunderland Astronomical Society – Astronomical Society founded in 1993 by a group of enthusiastic local amateur astronomers.
Manchester Astronomical Society – Information about the society, articles and astronomy links.
International Meteor Organization – This is the best resource for the latest information regarding meteor showers. You will also find a huge archive of observations collected from amateur astronomers.
Ioffe Department of Theoretical Astrophysics – Research activities, publications and electronic resources.
Canberra Astronomical Society – Serving the needs of amateur astronomers within the Australian Capital Territory and surrounding regions.
Southern Astronomical Society – Amateur astronomy club serving Brisbane, Gold Coast, and East Queensland enthusiasts.
South East Queensland Astronomical Society – Located in Queensland, Australia, the society consists of a group of amateur astronomers who get together and share their views, ideas, and telescopes with friends and fellow members.
Jordanian Astronomical Society – Astronomical events and articles on various astronomy topics.
Isle of Man Astronomical Society – History of the society, gallery, articles, and links to other astronomy sites.
ASSA Bloemfontein Centre – Homepage of the Astronomical Society of Southern Africa, Bloemfontein Centre.
Kerry Astronomy Club – A small but active club in cloudy southwest Ireland.